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Q. By what percent must one increase the tension in a guitar string to change the speed of waves on the string from 327 m/s to 376 m/s?

Q. Calculate the gravitational potential energy of a 72 kg mass on the surface of the Earth.

Calculate the gravitational potential energy at an altitude of 16 km.

Take the difference between the results for parts (b) and (a), and then compare with mgh, where h = 16 km.

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Category:- Physics
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