Question

1. which pictures on the inside last page of pg. 82 best shows a student listening to a low frequency sound? a b c a + b b + c c + a

Explanation:

Low frequency sound waves have a longer wavelength (fewer waves per unit distance). Looking at the images:

• Image B has closely spaced waves (short wavelength, high frequency).
• Images A and C have widely spaced waves (long wavelength, low frequency), which match the property of low frequency sound.

Answer:

C+A