Question

Absolute Viscosity is difficult to measure because it depend on:
A. Total volume of liquid flowing
B. Pressure on the liquid
C.Radius and length of the tube
D. All the above factors.​

Answer 1

Absolute viscosity is difficult to determine since it is dependent on (B) liquid pressure.

Explanation:

• The force required by a fluid to overcome its own internal molecular friction is known as absolute viscosity.
• The term "ideal" or "inviscid" refers to a fluid that has no resistance to shear stress. In superfluids, zero viscosity is only observed at extremely low temperatures.
• Otherwise, the second law of thermodynamics mandates that all fluids have positive viscosity; such fluids are called viscous or viscid in technical terms. Pitch, for example, may appear to be solid due to its high viscosity.