A railroad whistle is sounded an echo is heard 50 seconds
A railroad whistle is sounded. An echo is heard 5.0 seconds later. If the speed of sound is 343m/s, how far away is the reflecting surface?
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a railroad whistle is sounded an echo is heard 50 seconds later if the speed of sound is 343ms how far away is the
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a homogeneous bar of length l can rotate on a horizontal frictionless plane around a vertical axis passing during one
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