Physics, 11.12.2019 03:31 yungnoaweo4209
Aperson standing close to a railroad crossing hears the whistle of an approaching train. he notes that the pitch of the whistle drops as the train passes by and moves away from the crossing. the frequency of the approaching whistle is 516 hz, and drops to 494 hz after the train is well past the crossing. what is the speed of the train?
Answers: 3
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The friction of the water on a boat produces an acceleration of -10. m/s2. if the boat is traveling at 30. m/s and the motor is shut off, how long it take the boat to slow down to 5.0 m/s?
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Which of the following best describes the circuit shown below?
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Aperson standing close to a railroad crossing hears the whistle of an approaching train. he notes th...
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