A parachutist leaps from a hovering helicopter and after 40
A parachutist leaps from a hovering helicopter, and after 4.0 s of free fall shouts back toward the helicopter. If the shout is emitted at 425 Hz, what frequency is heard on the helicopter? Assume the sound speed in air is 343m/s
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a parachutist leaps from a hovering helicopter and after 40 s of free fall shouts back toward the helicopter if the
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