A 200Hz wave with amplitude 1mm travels on a long string of linear mass density 6 g/m kept under a tension of 60N. The total energy associated with the wave in a 2.0m long portion of the string is?
A
9.4J
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B
9.4mJ
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C
18.8J
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D
18.8mJ
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Solution
The correct option is A9.4J A=1mm=10–3m,m=6g/m=6x10–3kg/m