Bat produces sound while moving in
dark, but we cannot hear it because
a) Its frequency is more than 20000Hz
b) Only bats can hear it
c) Its frequency is less than 20Hz
d) None of these
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Bat produces sound while moving in
dark, but we cannot hear it because
a) Its frequency is more than 20000Hz
b) Only bats can hear it
c) Its frequency is less than 20Hz
d) None of these
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Answer:
c) Its frequency is less than 20Hz
Answer:
c)it's frequency is less than 20hz
Explanation:
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