Four different whistles, when blown, emit pure notes with the frequencies, 0.1 kHz, 1 kHz, 10 kHz, 100 kHz.
How many of the frequencies are above the normal audible range for humans?
(a) 1
(b) 2
(c) 3
(d) 4
Ans 1: (Master Answer)
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Ans 2:
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Class : Class 8
The answer should be 3 because humans can hear sounds ranging from 20 Hz to 20,000 Hz.
Ans 4:
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Ans 7:
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Class : Class 10
Yes the answer should be 3 because human's Audible range is fron 20HZ TO 20KHZ.And here10 khz,0.1 khz and 1 khz comes Under this but not 100khzThanks.