Ultrasonic waves are not used in which of the following?

State whether the following statement is true or false: Sound waves are transverse,whereas light waves are longitudinal in nature.

On a slinky,we can produce:

State three factors on which the speed of sound in a medium depends.

$(a)$ Why does the stage of an auditorium have a curved background,curtains,carpets,and a false ceiling?
$(b)$ The sound of a ringing bell inside a vacuum chamber cannot be heard. Why?

$(a)$ What is meant by intensity of sound?
$(b)$ Mention the conditions for an echo to be heard clearly.
$(c)$ $A$ ball is dropped into a pond from a height of $44.1 \, m$. The splash of sound is heard $3.13 \, s$ after the ball is dropped. Determine the velocity of sound in air.