what is seconds pendulum. What is the length of a second pendulum on the earth.
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0.994 m
The seconds pendulum (also called the Royal pendulum), 0.994 m (39.1 in) long, in which each swing takes one second, became widely used in quality clocks. The long narrow clocks built around these pendulums, first made by William Clement around 1680, became known as grandfather clocks.
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Answer:
a pendulum is a weight hung from a fixed point in such a way that it can swing freely
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