A hammer taps on the end of a 4.10-m-long metal bar at room temperature. A microphone at the other end of the bar picks up two pulses of sound, one that travels through the metal and one that travels through the air. The pulses are separated in time by 11.1 ms .

Speed of sound inside metal is ≅ 8200

Explanation:

Given :

Length of metal bar m

From general velocity equation,

Where speed of sound in air = 343

For finding time from above equation,

sec

Since pulses are separated by     sec

So we take time difference,

So speed of sound in metal is,

-4 on

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