Define unit of time??
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Answer:
The unit of time is second
Explanation:
1 second is described as about 9 billion oscillation of Caesium atom
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A unit of time or midst unit is any particular time interval, used as a standard way of measuring or expressing duration. The base unit of time in the International System of Units (SI) and by extension most of the Western world, is the second, defined as about 9 billion oscillations of the caesium atom.
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