Question

Please Help Been Here for a hour!

The sound wave behind a moving sound source would have a ________ wavelength compared to the sound wave in front of the sound source.

shorter

longer

louder

softer

Answer 1

longer

Answer 2

as your speed increases the sound waves get longer and bunch up on the front. Think of a passing train or cop car how the sound changes when they pass you. Now think of a jet's sonic boom, this happens when the jets velocity out runs the speed of sound.