Question

A liquid at 20c has a relative density of 0.80 and kinematic viscosity of 2.3 centistokes. determine unit weight and dynamic viscosity in PSs.

Answer 1

Explanation:

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Answer 2

Dynamic viscosity of the liquid is 92 m/s.

Explanation:

Dynamic viscosity:

• Dynamic viscosity is the force needed by a fluid to overcome its own internal molecular friction so that the fluid will flow.

Kinematic viscosity:

• The other way is to measure the resistive flow of a fluid under the weight of gravity.
• The result is kinematic viscosity.
• This is because kinematic results are dependent on the density of the fluid.

$Dynamic viscosity=\frac{kinematic viscosity*relative density*1000}{density}$

                              $=\frac{2.3*0.8*1000}{20}$

                              $=92 m/s$

Hence, the dynamic viscosity is 92 m/s.