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Q.

Is it true that humans can hear the ultrasound inside the water?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is False.
The human range of hearing is 20 Hz to 20 KHz. While ultrasound are those sounds whose frequency is more than 20 KHz. Inside the water, the frequency of the sounds is increased hence humans can not hear the ultrasound whether inside the water or outside the water.
The correct statement would be that humans can not hear the ultrasound inside the water.
 
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