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[" 16.The prong of a electrically operat...

[" 16.The prong of a electrically operated tuning fork is connected to a long of "mu=1kg/mand" tension "],[25N" .The maximum velocity ofthe prong is "1cm/s" ,then the average power needed to drive the prongis: "],[[" (A) "5times10^(-4)W," (B) "2.5times10^(-4)W," (C) "1times10^(-4)W," (D) "10^(-3)W]]

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