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Sound — PHYSICS STD 9 — Question

ICSE BoardEnglish MediumSTD 9PHYSICSSound1 Mark
Question
How are bats able to avoid obstacles in their way?
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Answer

Bats emit the high frequencies that range between 20 KHz to 75 KHz. The echoes from these sounds help in locating the obstacles in their path and to avoid them.

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