Question

define coefficient of viscosity describe rankine's method, method for measuring the coefficient of viscosity of a gas​

Answer 1

What is the coefficient of viscosity?

Ans. The coefficient of viscosity (η) is the ratio of applied stress to the rate of straining (change of strain with time). It is measured in units of poise; one poise equals one dyne-second per square centimetre.

What is viscosity of gas?

Ans. The viscosity of a gas can be thought of as a measure of its resistance to flow and is measured in the CGS unit Poise = dyne sec/cm2. The viscosity of gases near room temperature are in the centiPoise range, so that is a commonly used unit.