question_answer

The velocity of sound in a tube containing air at \[{{27}^{\circ }}C\] and a pressure \[\mathbf{76}\text{ }\mathbf{cm}\] of mercury is\[\text{330 m}{{\text{s}}^{\text{-1}}}\]. What will be the velocity of sound when pressure is increased to \[\mathbf{100}\text{ }\mathbf{cm}\] of mercury and the temperature is kept constant?

Answer:

                At a given temperature, the velocity of sound in a gas is independent of pressure. Hence the velocity of sound in the tube will remain\[\text{330 m}{{\text{s}}^{\text{-1}}}\].