Question

1. which pictures on the inside last page of pg. 82 best shows a student listening to a loud sound? * 5 points a b c a + b b + c c + a

Explanation:

Loud sound is associated with sound waves that have large amplitude (wider, more spread-out wave peaks) and the listener will react with visible discomfort, like widened eyes. Image A has wide amplitude waves and a reacting student, Image B has closely packed (high frequency, not loud) waves, Image C has wide amplitude waves and a reacting student. So A and C match the criteria.

Answer:

C+A