Question

define physical constant​

Answer 1

Answer:

A physical constant, sometimes fundamental physical constant or universal constant, is a physical quantity that is generally believed to be both universal in nature and have constant value in time. ... Since May 2019, all of the SI base units have been defined in terms of physical constants.

Explanation:

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Answer 2

Answer:

A physical constant sometimes fundamental physical constant or universal constant is a physical quantity that is generally believed to be both universal in nature and have constant value in time

Explanation:

all of SI base units have been defined in term of physical constant