AFTER a ringing tuning fork passes very quickly in front of a stationary observer... a) The sound waves are equally spaced out b) The sound has a lower pitch c) The sound waves have equal amplitudes d)

AFTER a ringing tuning fork passes very quickly in front of a stationary observer...

a) The sound waves are equally spaced out
b) The sound has a lower pitch
c) The sound waves have equal amplitudes
d) all could apply

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