A piano wire of length 1.5 m vibrates so that one-half wavelength ...

[Redwolflake15]

Question 1

A piano string of density 0.005 0 kg/m is under a tension of 1 350 N. Find the velocity with which a wave travels on the string.

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260 m/s

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520 m/s

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1 040 m/s

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2 080 m/s

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4 160 m/s

Question 2

A piano wire of length 1.5 m vibrates so that one-half wavelength is contained on the string. If the frequency of vibration is 65 Hz, the amplitude of vibration is 3.0 mm, and the density is 15 g/m, how much energy is transmitted per second down the wire?

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21 W

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11 W

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5.4 W

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2.2 W

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1.1 W

[prumorgan]

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[jajajajjaja]

Thanks so much!