If the time taken to complete 2 waves is 4 seconds. Find the time period of this wave?

If 120 waves are emitted in 1 minute, then the frequency of this source is?

Find the velocity of a wave whose wavelength is 10 m and frequency is 2 Hz?

Find the frequency of a wave whose time period is 5 seconds?

The waves which need a medium to travel are called

Light is a example of

sound travels in the form of

The region of high pressure and density in a medium during sound travel is called

Astronauts cannot hear each other on the moon because

……………. is a device that uses ultrasonic waves to measure the distance, direction and speed of underwater bodies.

The technique of obtaining images of internal organs of the body by using ultrasonic waves is called …………….

Sound of frequency below …………… is called infrasonic sound.

Sound travels through which medium?

 To hear a distinct echo each time interval between the original sound and the reflected sound must be

Sound travels in a medium with a speed of 340 m/s. If an echo is heard after 1 second, find the distance between the source and the observer?

A wave has a frequency of 100 Hz and travels at a speed of 1000 m/s. Find the distance travelled by this wave in 20 vibrations?