Bats Using Ultrasonic Waves

The speed of highly penetrating ultrasonic waves is:

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

(a) What is the difference between infrasonic waves and ultrasonic waves? (b) Choose the infrasonic waves and ultrasonic waves from the following frequencies: (i) 10,000 Hz (ii) 30,000 Hz (iii) 18 Hz (iv) 50,000 Hz (v) 10 Hz

Which of the following rays and waves do not belong to electromagnetic spectrum ? alpha rays , X rays, Ultraviolet rays , Radiowaves , Cathode rays , Ultrasonic waves, Infrared rays and Microwaves

What are ultrasonic waves ?