Swinging of simple pendulum
A simple pendulum is swinging back and forth through a small angle, its motion repeating every 1.33 s. How much longer should the pendulum be made in order to increase its period by 0.29 s?
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The frequency of a steam train whistle as it approaches you is 538Hz. After it passes you, its frequency is 486Hz. How fast was the train moving? (please show work for credit)
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