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Answer» A\xa0seconds pendulum\xa0is a\xa0pendulum\xa0whose period is precisely two\xa0seconds; one\xa0second\xa0for a swing in one direction and one\xa0second\xa0for the return swing, a frequency of 1/2 Hz. A\xa0pendulum\xa0is a weight suspended from a pivot so that it can swing freely.When a pendulum is displaced sideways from its resting equilibrium position, it is subject to a restoring force due to gravity that will accelerate it back toward the equilibrium position. When released, the restoring force combined with the pendulum\'s mass causes it to oscillate about the equilibrium position, swinging back and forth. The time for one complete cycle, a left swing and a right swing, is called the period. The period depends on the length of the pendulum, and also to a slight degree on its weight distribution (the moment of inertia about its own center of mass) and the amplitude (width) of the pendulum\'s swing.\xa0
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