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Question
Describe an experiment to estimate the speed of sound in air.
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Solution
To estimate the speed of sound in air suppose we choose two hills A and B about a kilometer apart. A person at the hill A fires a gun. Another person at the hill B starts a stopwatch as he sees the flash of the fire and stops it on hearing the sound. Thus, he measures the time interval between the seeing of flash and hearing of the sound. Let it bet second. Then measure the distance between the hills A and B. Let it be S meter.
The speed of sound V
= `"Distance (S)"/" Time (t)"`
= `"S"/"t" "ms" ^-1`
Experimentally,it is found that the speed of sound in air is nearly 330 ms-1
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