1. Standing waves of frequency 52 Hz are produced on a string that has a mass per unit length 0.015 kg/m. With what tension (in N) must the string be stretched between two supports if adjacent nodes in the standing wave are to be 0.74 m apart?

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Chapter1: Units, Trigonometry. And Vectors
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Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...
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1. Standing waves of frequency 52 Hz are produced on a string that has a mass per unit length 0.015 kg/m. With what tension (in N) must the string be stretched between two supports if adjacent nodes in the standing wave are to be 0.74 m apart?

2. You and your surfing buddy are waiting to catch a wave a few hundred meters off the beach. The waves are conveniently sinusoidal, and you notice that when you're on the top of one wave and moving toward your friend, she is exactly halfway between you and the trough of the wave. 1.73 s later, your friend is at the top of the wave. You estimate the horizontal distance between you and your friend at 8.74 m. Find the speed of the waves (in m/s).

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