How is time defined in physics

[From: ] [author: ] [Date: 11-11-09] [Hit: ]

-time is the variable t, and is most commonly refered in seconds, m/s, m/s^2 etc..-Seconds,......

By the period of the radiation waves of a particular radio isotope. Caesium I think.

time is the variable t, and is most commonly refered in seconds, m/s, m/s^2 etc..

Seconds, or the variable of "t"

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