Question

Which of the following is not a scalar (a) viscosity (b) surface tension (c) pressure (d) stress

Answer 1

Answer:

viscosity is not a scalar

Answer 2

Answer:

Viscosity is a Scalar Quantity.

Explanation:

As we know,

Scalar quantities are those quantities that posses only magitude. They are dimensionless quantities.

Vector quantities are those quantities that posses magnitude as well as direction.

Since, Viscosity only occours between the fluid layers or a fluid and a solid surface. It acts like a friction (resistance) between them. It does not have any direction.

Viscosity is represented by 'μ'.

Fluids have a constant viscosity are Newtonian fluids and fluids that have non-constant viscosity are Non - Newtonian fluid.

Rest, surface tension, pressure and stress have directions and hence are vector quantities.