Question

the lower the amplitude (the height) of a sound wave, the quieter the sound. which of the following sound waves illustrates the quietest sound? (wave 1 has an amplitude of 2 cm, wave 2 has an amplitude of 4 cm, wave 3 has an amplitude of 1 cm, and wave 4 has an amplitude of 4 cm)

Explanation:

Step1: Recall the relationship between amplitude and sound loudness

The problem states that the lower the amplitude of a sound wave, the quieter the sound. So we need to find the wave with the smallest amplitude.

Step2: Compare the amplitudes of the waves

Wave 1: amplitude = 2 cm; Wave 2: amplitude = 4 cm; Wave 3: amplitude = 1 cm; Wave 4: amplitude = 4 cm.
Among these, 1 cm (Wave 3's amplitude) is the smallest. So the wave with the smallest amplitude (Wave 3) represents the quietest sound.

Answer:

Wave 3 (the third wave from the top, or the wave with amplitude 1 cm)