(Answered) A thin 2m long string with mass 3 g is stretched with a

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A thin 2m long string with mass 3 g is stretched with a tension 90N between two ends. When it vibrates with the third harmonic the amplitude of the string at an antinode A of the standing wave on the string has an amplitude of 5 cm.

a) What is the speed of propagation of waves in the string?

b) What is the maximum transverse speed of this point A on a string?

c) What is the total power of the string vibrations?

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