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posted by Mani on Wednesday, July 6, 2011 at 11:21pm.

1=2pi times the square root of (L/9.8)

Period of pendulum = 1 second what is its length ? 1^2 = (2pi)^2 L/9.8 L = 9.8/(2pi)^2 L = .248 meters or 24.8 cm, about 10 inches

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