Question

10. The force F on a sphere of radius a moving in a medium with
velocity v is given by F = 6n na v. The dimensions of n are
(a) [ML-3) (b) [MLT-?] (C) [MT-11 (d) [ML-'T-']​

Answer 1

Answer:

ANSWER

[F]=[6πηav]

or, MLT

−2

=[η]L.LT

−1

or, [η]=ML

−1

T

−1

Answer 2

d) [ML^-1T^-1]

This is the dimensional formula of coefficient of viscosity (η)