InterviewSolution
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InterviewSolution
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A stone is dropped into a pond from the top of the tower of height h. If v is the speed of sound in air, then the sound of splash will be heard at the top of the tower after a timeA. `sqrt((2h)/g)+h/v`B. `sqrt((2h)/g)-h/v`C. `sqrt((2h)/g)`D. `sqrt((2h)/g)+(2h)/v` |
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Answer» Correct Answer - A Let `t_(1)` be the time taken by the to stone to strike the surface of water in the pond. Using h =`u+1/2"gt"^(2)` `thereforeh=1/2"gt"^(2)` (`becauseu=0`) `or t_(1)=sqrt((2h)/g)` Time taken by sound to reach the top of tower, `t_(2) = h/v` Total time after which splash of sound is heard `t=t_(1)+t_(2)=sqrt((2h)/g)+h/v` |
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