f(Hz), where cis the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 5 Hz. Determine with what minimum speed the locomotive was approaching the platform if the person could distinguish the signals, andm/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyHz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfmore than the first: it depends on the speed of the locomotive according to the law(Hz), where cm/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyHz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law(Hz), where cis the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andm/s. Express your answer in m/s.
, where R? (Express your answer in ohms.)
According to Ohm's law for complete chain current strength, measured in amperes, is equal to, where - source emf(in volts),Ohm is its internal resistance,R- circuit resistance (in ohms). At what minimum resistance of the circuit will the current be no more thanfrom current strength short circuit ? (Express your answer in ohms.)
According to Ohm's law for a complete circuit, the current strength, measured in amperes, is equal to, where - EMF of the source (in volts),Ohm is its internal resistance,R- circuit resistance (in ohms). At what minimum resistance of the circuit will the current be no more thanfrom the strength of the short circuit current? (Express your answer in ohms.)
According to Ohm's law for a complete circuit, the current strength, measured in amperes, is equal to, where - EMF of the source (in volts),Ohm is its internal resistance,R- circuit resistance (in ohms). At what minimum resistance of the circuit will the current be no more thanfrom the strength of the short circuit current? (Express your answer in ohms.)
Current in the circuit I, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 4 A. Determine what the minimum resistance must be for an electrical appliance connected to a 220 volt outlet so that the network continues to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 25 A. Determine what the minimum resistance must be for an electrical appliance connected to a 220 volt outlet so that the network continues to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. There is a fuse in the mains that melts if the current exceeds 10 A. Determine the minimum resistance that an electrical appliance connected to a 220 volt outlet must have in order for the network to continue to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 8 A. Determine the minimum resistance that an electrical appliance connected to a 220 volt outlet must have in order for the network to continue to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 27.5 A. Determine what the minimum resistance must be for an electrical appliance connected to a 220 volt outlet so that the network continues to work. Express your answer in ohms.
, where ), - constant parameter,- resonant frequency. Find maximum frequency
, smaller than the resonant one, for which the oscillation amplitude exceeds the value no more than . Express your answer in.
The amplitude of the pendulum oscillations depends on the frequency of the driving force and is determined by the formula, where - frequency of the driving force (in
Answer: 7.
Answer: 12
f c is the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for known value constant Hz:
Answer: 7.
Answer: 6
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Answer: 15
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Answer: 1
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 7 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 2 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 8 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 4 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Answer: .
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 4 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 8 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Answer: 000
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Answer: 7.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep f greater than the first: it depends on the speed of the locomotive according to the law (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m / s. c - the speed of sound in sound (in m / s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine the minimum speed with which the locomotive approached the platform if the person could distinguish the signals, and c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 9 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine the minimum speed with which the locomotive approached the platform if the person could distinguish the signals, and c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, a (Hz), where c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 9 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine the minimum speed with which the locomotive approached the platform if the person could distinguish the signals, and c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine the minimum speed with which the locomotive approached the platform if the person could distinguish the signals, and c is the speed of sound in sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 2 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
This task has not yet been solved, we present the solution of the prototype.
Before departure, the locomotive emitted a beep with a frequency of Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beep is greater than the first: it depends on the speed of the locomotive according to the law (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine the minimum speed with which the locomotive approached the platform if the person could distinguish the signals, a (Hz), where is the speed of sound (in m/s). A person standing on the platform distinguishes signals by tone if they differ by at least 7 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, and m / s. Express your answer in m/s.
Solution.
The problem is reduced to solving the inequality for a known value of the constant Hz:
Thus, the minimum speed of the locomotive should be 3.5 m/s.
Answer: 3.5.
In this series of tasks from the open FIPI bank with practical (physical) content, you must be able to work with algebraic fractions, perform transformations of these fractions. And also do not very complex decimal calculations.
In all the tasks presented below, the formula for calculating the frequency of the diesel locomotive horn is used
Task #41897 Before departure, the locomotive emitted a beep with a frequencyf 0 =447 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepf 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Solution.Substituting all the data into formula (1), we obtain
Tasks for independent work
f 0 =309 fgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 6 c=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =496 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 4 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =597 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =244 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =308 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 7 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =445 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =517 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepf 8 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =190 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=320 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =395 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=320 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =312 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =498 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 2 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =195 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=320 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =292 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 8 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =197 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=320 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =371 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 4 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =596 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 4 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =317 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=320 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =492 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 8 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =594 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =372 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 3 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =366 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 9 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =370 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =340 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =591 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 9 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =195 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =291 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 9 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =519 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=315 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =248 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 2 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyf 0 =593 Hz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law (1). A person standing on the platform distinguishes signals by tone if they differ by at least 7 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andc=300 m/s. Express your answer in m/s.
cis the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 6 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andm/s. Express your answer in m/s.f(Hz), where cis the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 5 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andm/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyHz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law(Hz), where cm/s. Express your answer in m/s.
Before departure, the locomotive emitted a beep with a frequencyHz. A little later, a locomotive approaching the platform blew a horn. Due to the Doppler effect, the frequency of the second beepfgreater than the first: it depends on the speed of the locomotive according to the law(Hz), where cis the speed of sound in sound (in m/s). A person standing on a platform distinguishes signals by tone if they differ by more than 10 Hz. Determine with what minimum speed the locomotive approached the platform if the person could distinguish the signals, andm/s. Express your answer in m/s.
, where R? (Express your answer in ohms.)
According to Ohm's law for a complete circuit, the current strength, measured in amperes, is equal to, where - EMF of the source (in volts),Ohm is its internal resistance,R- circuit resistance (in ohms). At what minimum resistance of the circuit will the current be no more thanfrom the strength of the short circuit current? (Express your answer in ohms.)
According to Ohm's law for a complete circuit, the current strength, measured in amperes, is equal to, where - EMF of the source (in volts),Ohm is its internal resistance,R- circuit resistance (in ohms). At what minimum resistance of the circuit will the current be no more thanfrom the strength of the short circuit current? (Express your answer in ohms.)
According to Ohm's law for a complete circuit, the current strength, measured in amperes, is equal to, where - EMF of the source (in volts),Ohm is its internal resistance,R- circuit resistance (in ohms). At what minimum resistance of the circuit will the current be no more thanfrom the strength of the short circuit current? (Express your answer in ohms.)
Current in the circuit I, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 4 A. Determine what the minimum resistance must be for an electrical appliance connected to a 220 volt outlet so that the network continues to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 25 A. Determine what the minimum resistance must be for an electrical appliance connected to a 220 volt outlet so that the network continues to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. There is a fuse in the mains that melts if the current exceeds 10 A. Determine the minimum resistance that an electrical appliance connected to a 220 volt outlet must have in order for the network to continue to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 8 A. Determine the minimum resistance that an electrical appliance connected to a 220 volt outlet must have in order for the network to continue to work. Express your answer in ohms.
Current in the circuit I(in amperes) is determined by the voltage in the circuit and the resistance of the electrical appliance according to Ohm's law:, where U- voltage in volts,R- the resistance of the electrical appliance in ohms. A fuse is included in the mains, which melts if the current exceeds 27.5 A. Determine what the minimum resistance must be for an electrical appliance connected to a 220 volt outlet so that the network continues to work. Express your answer in ohms.
, where ), - constant parameter, no more than . Express your answer in.
The amplitude of the pendulum oscillations depends on the frequency of the driving force and is determined by the formula, where - frequency of the driving force (in), - constant parameter,- resonant frequency. Find the maximum frequency, smaller than the resonant one, for which the oscillation amplitude exceeds the value no more than . Express your answer in.
The amplitude of the pendulum oscillations depends on the frequency of the driving force and is determined by the formula, where - frequency of the driving force (in), - constant parameter,- resonant frequency. Find the maximum frequency, smaller than the resonant one, for which the oscillation amplitude exceeds the valueno more than one fifteenth. Express your answer in.
The amplitude of the pendulum oscillations depends on the frequency of the driving force and is determined by the formula, where - frequency of the driving force (in), - constant parameter,- resonant frequency. Find the maximum frequency, smaller than the resonant one, for which the oscillation amplitude exceeds the valueno more than one third. Express your answer in.
Ohm and
(Ohm), and for the normal functioning of the mains total resistance it should be at least 8 ohms. Express your answer in ohms.
Appliances are connected to the mains socket, the total resistance of which isOhm. In parallel with them, an electric heater is supposed to be connected to the outlet. Determine the smallest possible resistancethis electric heater, if it is known that at parallel connection two conductors with resistances Ohm and Ohm their total resistance is given by the formula(Ohm), and for the normal functioning of the electrical network, the total resistance in it must be at least 9 ohms. Express your answer in ohms.
Appliances are connected to the mains socket, the total resistance of which isOhm. In parallel with them, an electric heater is supposed to be connected to the outlet. Determine the smallest possible resistancethis electric heater, if it is known that when two conductors with resistances are connected in parallel Ohm and Ohm their total resistance is given by the formula(Ohm), and for the normal functioning of the mains, the total resistance in it must be at least 18 Ohms. Express your answer in ohms.
, whereCoefficient useful action(efficiency) of some engine is determined by the formula, where - heater temperature (in degrees Kelvin),- refrigerator temperature (in degrees Kelvin). At what minimum temperature of the heaterThe efficiency of this engine will be no lessif the refrigerator temperatureTO? Express your answer in degrees Kelvin.
The coefficient of performance (COP) of a certain engine is determined by the formula, where - heater temperature (in degrees Kelvin),- refrigerator temperature (in degrees Kelvin). At what minimum temperature of the heaterThe efficiency of this engine will be no lessif the refrigerator temperatureTO? Express your answer in degrees Kelvin.
Lesson 13-15. Solving addiction problems (physical problems).
Task 1. For one of the enterprises - monopolists, the dependence of the volume of demand for products q (units per month) on its price p (thousands per month) is given by the formula q=150-10p. Determine maximum level prices p (in thousand rubles), at which the value of the company's revenue for the month r=q. p will be at least 440 thousand rubles.
Solution.
10p2-150p+440=0,
p1=11-maximum value
Task 2. The stone-throwing machine model shoots stones at a certain angle to the horizon with a fixed initial speed. Its design is such that the flight path of the stone is described by the formula
y \u003d ax2 + bx, where a \u003d -1 / m, b \u003d - constant parameters. Which greatest distance(in meters) from the fortress price 8 m high, you need to position the car so that the stones fly over it?
Solution.
We substitute all known quantities into the formula and solve the resulting equation.
-
,
-
,
D=250000-160000=90000=3002.
,
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Answer: 6.25
Task 4. The dependence of temperature (in degrees Kelvin) on time (in minutes) for the heating element of some device was obtained experimentally and on the studied temperature range is given by the expression T(t)=T0+at+bt2, where T0=340K, a=28 K/min , b=-0.2K/min. It is known that at heater temperatures above 1000 K, the device may deteriorate, so it must be turned off. Determine (in minutes) how long longest time after starting work, turn off the device.
Solution.
0.2t2+28t+340=1000.
Having solved the quadratic equation, we get t1=110, t2=30. This means that after 30 minutes of operation, the device must be turned off.
Task 5. Appliances with a total resistance of 80 ohms are connected to the power outlet. In parallel with them, an electric heater is supposed to be connected to the outlet. Determine (in ohms) the smallest possible resistance of this heater, if it is known that when two conductors with resistances R1 and R2 are connected in parallel, their total resistance is given by the formula R=https://pandia.ru/text/80/152/images/image013_35. gif" width="57 height=47" height="47">,
Task 6. For determining effective temperature stars use the Stefan-Boltzmann law, according to which the radiation power of a heated body is calculated by the formula: https://pandia.ru/text/80/152/images/image015_27.gif" width="85" height="23 src="> - numerical coefficient, area is measured in square meters, temperature - in degrees Kelvin, and power - in watts..gif" width="93" height="47">=
Answer: 6000
Task 7. At a temperature of 0°C, the rail has a length of lo = 10 m. When laying tracks between the rails, a gap of 3 mm is left. As the temperature rises, thermal expansion of the rail will occur, and its length will change according to the law l(t)=lo(1+https://pandia.ru/text/80/152/images/image020_22.gif" width="84 height \u003d 23 "height \u003d" 23 "\u003e (оС) -1- coefficient of thermal expansion, to - temperature (in degrees Celsius). At what minimum temperature will the gap between the rails disappear? Express your answer in degrees Celsius.
Solution.
l(t)=(10+3.10-3)m
Substitute the known values into the formula and solve the resulting equation
10+3.10-3=10(1+1,2.10-5t)
10+3.10-3=10+1,2.10-4t
t=https://pandia.ru/text/80/152/images/image022_18.gif" width="15" height="41 src=">, t2=
Task 10. A crane is fixed in the side wall of a high cylindrical tank near the bottom. After it is opened, water begins to flow out of the tank, while the height of the water column in it, expressed in meters, changes according to the law
H(t)=Ho- 
, where t is the elapsed time (in seconds), Ho=5 m is the initial height of the column, k= is the ratio of the areas of the cross sections of the crane and the tank, and g=10m/s2 is the free fall acceleration. By what point in time will there be no more than a quarter of the original volume in the tank? Express your answer in seconds.
Solution.
H= Ho=m, substitute the known values into the formula and solve the resulting equation: https://pandia.ru/text/80/152/images/image029_15.gif" width="29" height="44">. the time (in minutes) that a motorcyclist will be in a cellular coverage area, if the operator guarantees coverage at a distance of no more than 30 km from the city.
Solution. Substitute the known values into the formula and solve the resulting equation: where c is the speed of sound (in m/s) A person standing on the platform distinguishes the signals by tone if they differ by more than 2 Hz Determine the minimum speed with which the locomotive approached the platform if the person could distinguish the signals, and c \u003d 315 m / s. Express your answer in m / s.
Solution.
Deciding given equation, we get v=2.5m/s
Task 13. A car whose mass is m=2000 kg starts moving with an acceleration that remains unchanged for t seconds and travels a distance S=1000 m during this time. The value of the force (in Newtons) applied to the car at this time is F=(H). Determine the longest time after the start of the car movement, during which it will cover the indicated path, if it is known that the force F applied to the car is not less than 1600 N. Give your answer in seconds.
Solution.
Task 14. The ball is thrown at an acute angle to a flat horizontal surface of the earth. The flight time of the ball (in seconds) is determined by the formula . What is the smallest value of the angle (in degrees) for which the flight time will be at least 1.7 s if the ball is thrown with an initial speed vo=17m/s? Consider free fall accelerations g=10 m/s2.
Solution.
https://pandia.ru/text/80/152/images/image038_10.gif" width="63" height="41 src=">,
d/z No. 000-674
