A student plotted the following four graphs, figure. Representing variation of velocity of sound in a gas with the pressure P. Which ons is correct and why?

A student plotted the following four graphs, figure. Representing vari

1.	A student plotted the following four graphs, figure. Representing variation of velocity of sound in a gas with the pressure P. Which ons is correct and why?
Answer» Solution :The speed of SOUND in a gas does not depend upon PRESSURE of the gas, till temperature remains constant, i.e., speed remains the same WHATEVER be the pressure. THEREFORE, graph (d) is correct.