1.

Calculate the time for which the sensation of sound persists in our brain if the minimum distance of the obstacle from the source of sound is 17.2 m (speed of sound in air = 344 m/s)

Answer»

2 d = v × t
2 × 17.2 = 344 × 7
t = \(\frac { 34.4 }{ 344 }\) = 0.1 s



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