What frequency is heard by a stationary observer
A fire engine has a siren whose frequency is 600Hz. What frequency is heard by a stationary observer when the engine moves toward him at 25.0m/s is the temperature outside is 40 degrees Celsius, speed of sound 355m/s?
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Two horizontal forces, 249 N and 165 N, are exerted in opposite directions on a crate. What is the net horizontal force on the crate? Be sure to indicate the direction of the net force. (Assume that the 249 N force is in the positive direction.)
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What frequency is heard by a stationary observer when the engine moves toward him at 25.0m/s is the temperature outside is 40 degrees Celsius, speed of sound 355m/s?
At the same time, a stationary trumpeter played the same note. Ballot heard 4 beats/s. How fast was the train moving toward him? The speed of sound in air is 343 m/s .
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Roger sees water balloons fall past his window. He notices that each balloon strikes the sidewalk 1.1 s after passing his window. Roger's room is on the fifth floor, 25 m above the sidewalk. Assuming the balloons are being released from rest, fro
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