Topic: Fluid Mechanics
Viscosity has the dimension of
- A. $(MT^{2})/L$
- B. $M^{2}/(LT)$
- C. $M/(LT^{2})$
- D. $M/(LT)$
Answer: D. $M/(LT)$
Explanation: Viscosity generally refers to dynamic viscosity $\mu$. The SI unit of dynamic viscosity is kg/(m·s) or Pa·s. Structurally, the dimensional formula for dynamic viscosity is $[M L^{-1} T^{-1}]$, which corresponds to $M/(LT)$.