Sound Test - 64...

A particle completes one vibration in 2 secs. How long does it take to vibrate 25 vibrations

A sound wave, whose time period is $$3\ s$$ passes through a medium for $$30\ s$$. The number of waves that had passed through is:

A particle performs $$20$$ vibrations in $$5\ s$$. The time period of vibration is:

A vibrating particle displacement is zero in every 2 secs. The frequency of vibration is

When a sound wave enters from one medium to another, the following parameters will vary

A sonar echo takes $$5s$$ to return from a submarine. If the speed of sound in water is $$1500 \,ms^{-1}$$, then the distance of submarine from the sonar station is:

A wave moving in gas:

The period of a source of a sound wave whose frequency is $$400 Hz$$

The relation  between frequency $$f$$, wavelength $$\lambda$$, and velocity of propagation $$v$$ of a wave is:

Hearing of repetition of sound after reflection from a distant object is called :