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How do you think we get the tide tables? Plus enables us to see near earth objects,(Things that come close to hitting earth), or may hit earth. or are you talking about on the subatomic level?

2007-03-31 08:14:50 · answer #1 · answered by Anonymous · 0 0

Without awareness of periodic motion, mankind would not be able to measure time. All units of time are based on the periodic motion of something. For example, the year is the periodic motion of the earth about the sun.

2007-03-31 13:01:53 · answer #2 · answered by Fred 7 · 0 0

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