Question 207: Units , Dimensions and Error Analysis

Question

Which one of the following represents the correct dimensions of the coefficient of viscosity?

Accepted Answer

From stokes law, Viscous force F = $$6\pi \eta rv$$
$$ \Rightarrow \eta  = {F \over {6\pi rv}}$$
$$	herefore$$ $$[\eta] = {[{ML{T^{ - 2}}]} \over {[L][L{T^{ - 1}}]}}$$
$$ \Rightarrow [\eta]  = [M{L^{ - 1}}{T^{ - 1}}]$$

Answer

ML
-1
T
-1

Answer

MLT
-1

Answer

ML
-1
T
-2

Answer

ML
-2
T
-2

Units , Dimensions and Error Analysis

Which one of the following represents the correct dimensions of the coefficient of viscosity?

Choose the correct answer: