An explosion occurs at an altitude of 312 m above the gro...
An explosion occurs at an altitude of 312 m above the ground. If the air temperature is -10.00°C, how long does it take the sound to reach the ground?
[velocity of sound at 0oC = 331 ms-1]
0.94s
0.96s
0.93s
0.95s
Correct answer is B
d=312m.,T =263-10^°c = -10+273K = 263K, t=?
v= 331√ \frac{T}{273}
⇒ v = 331×√ \frac{263}{273}
⇒ v = 324.88 ms^-1
⇒ v = \frac{d}{t}
t = \frac{d}{t} = \frac {312}{324.88}
t = 0.96s
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