Waves Test - 40...

A tuning fork makes 256 vibrations per second in air. When the velocity of sound is 330 m/s, then wavelength of the tone emitted is

A man sets his watch by a whistle that is 2 km away. How much will his watch be in error? (speed of sound in air 330 m/sec)

Angle between wave velocity and particle velocity of a longitudinal wave is

Velocity of sound waves in air is 330 m/sec. For a particular sound in air, a path difference of 40 cm is equivalent to a phase difference of 1.6π. The frequency of this wave is

The wavelength of ultrasonic waves in air is of the order of

The relation between phase difference (∆ɸ) and path difference (∆x) is

A hospital uses an ultrasonic scanner to locate tumours in a tissue. The operating frequency of the scanner is 4.2 MHz. The speed of sound in a tissue is 1.7 km – s^–1. The wavelength of sound in the tissue is close to

The minimum audible wavelength at room temperature is about

The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is

The number of waves contained in unit length of the medium is called