Question

In which of the following cases will the man hear sound earlier. Case-1-He strikes one end of the pipe and hears it from other side. Case-2-He fill the pipe with oil. He again strikes one end and hears from other end

Answer 1

The man will hear the sound in the Case: 2.

Sound travels faster in a denser medium. Oil is denser than air present in the pipe in Case:1. Hence sound would be heard earlier by him in Case:2

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