what is the SI unit of time
sonirimjhim54:
second is the si unit of time!
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The second, symbol s, is the SI unit of time. It is defined by taking the fixed numerical value of the caesium frequency Cs. , the unperturbed ground-state hyperfine transition frequency of the caesium-133 atom, to be 9 192 631 770 when expressed in the unit Hz, which is equal to s–1.
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In that sense, one can argue that the base unit of mass for the imperial and US customary systems is the kilogram! The primary unit of mass within the imperial and US customary systems is the pound. From the pound the other imperial and US customary units of mass are defined.
it is correct answer
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