Q24 of 54 Page 389

Sometimes our dog beings to bark without any reason. Can you explain, why?

Dogs can hear sounds which are beyond our audible range. So, whenever they hear a sound which is inaudible to us, they bark in a response to it.


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In which case is the speed of sound more; the humming of a bee or the roaring of a lion?

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When is the velocity of sound more; during winters or during summers?