The sound from a moving source will sound _______ as the sound source approaches and_______ as it moves away.

higher, lower
lower, higher
louder, lower
louder, higher
@DanJS @eric_d

Question

The sound from a moving source will sound _______ as the sound source approaches and_______ as it moves away.

 higher, lower
 lower, higher
 louder, lower
 louder, higher
@DanJS @eric_d

zzr0ck3r · Answer

imagine a car flying by you, or a train, what does it sound like?

eric_d · Answer

higher, lower

zzr0ck3r · Answer

http://en.wikipedia.org/wiki/Doppler_effect

anonymous · Answer

what is it? @DanJS

danjs · Answer

Ever heard an ambulance zoom past you

danjs · Answer

higher pitch as it approaches, lower pitch as it recedes

zzr0ck3r · Answer

yeah that's better

anonymous · Answer

so its A?

zzr0ck3r · Answer

or a car horn while you are walking near a road.

danjs · Answer

what, i just said the answer. lol 
yes it correlates to A

anonymous · Answer

thx lol!

zzr0ck3r · Answer

it also gets louder, because its getting closer, and also at the same time gets lower....