A wave is moving in air with a velocity of 340 m/s. Calculate the wavelength if its frequency is 512 vibrations/sec.

When we open a gas tap for a few seconds, the sound of escaping gas is heard first but the smell of gas comes later. Why?

A sound signal of 128 vibrations per second has a wavelength of 2.7 m. Calculate the speed with which the wave travels.

Define the ‘frequency’ and ‘time-period’ of a wave. What is the relation between the two?

Explain why, a ringing bell suspended in a vacuum chamber cannot be heard outside.