Sound Test - 8...

Match the following with correct response.

“Due to the high power of ultrasound waves. It is used for breaking and cutting objects”
The above statement is

Statement A: Human beings are ultrasound deaf
Statement B: Ultrasonic waves can travel easily in solid, liquid and gases.
Which of the two statements is true?

Match the following with correct response.
(1) Laws of reflection of sound
(2) An application of multiple reflection of sound
(3) Ultrasound
(4) SONAR

(A) Megaphone
(B) Measures Depth of the sea
(C) To monitor foetus inside mother’s womb
(D) Angle of reflection is equal to angle of incidence

Ultra sound is produced by
(A) Tortoise
(B) Bats
(C) Dolphins
(D) Dogs

A bat hears the echo of its squeak after 0.1 second. How far is the obstacle from the bat? Speed of sound is 344 ms^-1

Sonar stands for ______

The multiple reflection of sound in a hall is called

Statement A: Porpoises use ultrasound for navigation and location of food in dark
Statement B: When you listen to music or watch TV at home, the noise level is 100-120 decibels.
Which of the two statements is true?