1.

Speed of soundd calculated is roughlyA. `340m//sec`B. `380m//sec`C. `430m//sec`D. None of these

Answer» `l_(1) = 24.0cm`
`l_(2) = 74.0cm`
`v = 2f_(0) (l_(2)-l_(1)) = 2(340) (0.740 - 0.240)`
`= (2) (340) (0.500) = 340m//sec` .


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