Question
Download Solution PDFWhat is the SI unit of viscosity?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is Pascal-second.
Key Points
- Viscosity is a measure of resistance to flow which arises due to the internal friction between layers of fluid.
- This resistance to fluid motion is like internal friction analogous to friction when a solid moves on a surface.
- Strong intermolecular forces between molecules hold them together and resist the movement of layers past one another.
- The SI unit of viscosity is Pascal-second (Pa·s).
- Its other units are N s m-2 or Poiseuille (Pl).
- The dimensions of viscosity are [ML-1T-1].
- 1 poise = 1 g cm–1s–1 = 10–1kg m–1s–1.
Additional Information
- The product of force and time is called impulse, which is the change in momentum.
- Newton-Second is the derived unit of Impulse.
Last updated on May 28, 2025
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