If sound waves are generated in air, what moves away from the source? Is it the air itself or the state of compression and rarefaction created in the air?
How do the following parameters change in, (a) compression, (b) rarefaction when a longitudinal wave propagates in the air? (i) pressure, (ii) density, (iii) volume, (iv) mass.
The change in density/pressure of a medium from maximum value to minimum value and again to maximum value, due to the propagation of a longitudinal wave is called one complete: