1.

Assume that temperature varies linearly with height near the Earth's surface. Considering temperature at the surface of the Earth T_1 and T_2at a height h above the surface, calculate the time t needed for a sound wave produced at a height. x. to reach the Earth's surface. Velocity of sound at the Earth's surface is c.

Answer»

`t = (2h)/(c ) (sqrtT_1)/((T_2 - T_1)) [ sqrtT_1- sqrt((T_2 - T_1)/(H))x + T_1]`
`t = (2h)/(c ) (sqrtT_1)/((T_1 - T_2)) [sqrtT_1 - sqrt((T_2 - T_1)/(h))x + T_1]`
`t = (3H)/( c) (sqrtT_1)/((T_2 - T_1)) [ sqrtT_1 - sqrt((T_2-T_1)/(h)) x+ T_1]`
`t = (6h)/(c )(sqrtT_1)/((T__2- T_1)) [ sqrtT_1- sqrt((T_2 - T_1)/(h)) x + T_1 ]`

Answer :B


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