Bats Using Ultrasonic Waves

Ultrasonic waves are

The speed of highly penetrating ultrasonic waves is:

Name the system which enables us to locate underwater objects by transmitting ultrasonic waves and detecting the reflecting impulse.

Mention three applications of ultrasonic waves.

What is the name of the device which is used to find the depth of sea (or ocean) by using ultrasonic sound waves?

A bat emits ultrasonic waves of frequency 39 kHz and receives and echo 0.2 s later. If the speed of sound in air is 300 m/s and the speed of electro magnetic waves 3 xx 10^(8) m//s then the distance of the bat from the object producing the echo is

Electromagnetic waves used as a diagnostic tool in medicine are (A) X-rays (B) ultraviolet rays (C) infrared radiation (D) ultrasonic waves

Electromagnetic waves used as a diagnostic tool in medicine are (A) X-rays (B) ultraviolet rays (C) infrared radiation (D) ultrasonic waves