BECAUSE
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it can be used to provide accurate |
 note: today we use atomic vibrations for the most accurate clocks. |
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it can be used to measure  (the
acceleration due to gravity) which is important in determining the shape
of the earth and the distribution of materials within it (the science
of geodesy) |
 the pendulum helps scientists determine "g" force which is affected by: 1) distance from center of earth 2) masses attracting upwards (ie. mountains) 3) density of matter around you |
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and also it can be used to show that the
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