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If dimensions of critical velocity of a ...

If dimensions of critical velocity of a liquid `v_c` flowing through a tube are expressed as `[eta^xrho^yr^z]`, where `eta`, `rho` and `r` are the coefficient of viscosity of liquid, density of liquid and radius of the tube respectively, then the values of `x`, `y` and `z` are given by :

A

1,1,1

B

1,-1,-1

C

`-1,-1,1`

D

`-1,-1,-1`

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