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Q. A rod 2.8 m long is made of a metal in which the speed of sound is 2300 m/s. If you hit one end of the rod, when would a microphone at the other end first detect a disturbance?

Q. An 18 g rifle bullet traveling 200 m/s buries itself in a 3.6 kg pendulum hanging on a 2.8 m long string, which makes the pendulum swing upward in an arc. Determine the vertical component of the pendulum's displacement.

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