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