Question

A sound wave is passing through air column in the form of compression and rarefaction. In consecutive compressions and rarefactions,(a) density remains constant(b) Boyle's law is obeyed(c) bulk modulus of air oscillates(d) there is no transfer of heat

Answer 1

I think density remain constant

Answer 2

Answer:

D) No transfer of heat

Explanation:

When a sound wave travels through a medium (air), then the particles of medium are disturbed due to both compression and depression (rarefaction). When air particles come closer it is called compression, whereas when particles go farther than their normal position is called rarefaction. In the event of compression, the molecules of medium come closer to each other and in the condition of depression, the molecules of the medium go farther from each other, as compared to their normal positions.

When a compression takes place in the medium, the density and pressure of the medium also increases, whereas in depression density and pressure of the medium decreases. The increase and decrease in density and pressure is temporary. Thus, the compression is called the region of high density and pressure and depression is called the region of low density and pressure.