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Find a combination of these three consta...

Find a combination of these three constants that has the dimensions of time. This time is called the Planck time and represents the age of the universe before which the laws of physics as presently understood cannot be applied.

A

`sqrt((hG)/(c^(4))`

B

`sqrt((hG)/(c^(3))`

C

`sqrt((hG)/C``

D

`sqrt((hG)/(c^(5))`

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