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5. Sound
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Q53 of 199 Page 207

Explain how, bats use ultrasound to catch the prey.

The bats emit a very high frequency ultrasonic soundwaves while flying and listen to the echoes produced by the sound emitted by them from any prey. Judging by the time taken by the echo they catches their prey.


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51

Give one use of ultrasound in industry and one in hospitals.

52

How is it that bats are able to fly at night without colliding with other objects?

54

Explain how, flaws (or defects) in a metal block can be detected by using ultrasound.

55

Why are the ceilings of concert halls made curved? Draw a labelled diagram to illustrate your answer.

Questions · 199
5. Sound
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