The difference between the speed of sound in air at 0 degrees Celsius and the speed of sound in air at 20 degrees Celsius is that

Question

A) cooler air molecules move more slowly and respond less readily to the energy of a sound wave

B) cooler air molecules move more quickly and respond less readily to the energy of a sound wave.

C) Cooler air molecules do not move and respond less readily to the energy of a sound wave.

D) cooler air molecules move more randomly and less readily to the energy of a sound wave

I think it is a.

Answer 1

Cool air is denser, and sound does travel faster in denser mediums, but it seems to travel faster, at higher temperatures. This phenomenon occurs because hot air molecules tend to move around faster than they don in cold air. Go with answer a.