Question

Which of the following quantities has a unit but
dimensionless?
(a) Strain
(b) Reynolds number
(c) Angular displacement
(d) Poisson’s ratio

Answer 1

what quantities has a unit but dimensionless

Quantities having units, but no dimensions : Plane angle,angular displacement, solid angle. These physical quantities possess units but they does not possess dimensional formulas. B a physical quntatity neither having units nor dimensions are trigonometric ratios,strain , specific gravity etc.

Answer 2

Answer:

answer is

angular displacement

Explanation:

Angular displacement has unit (degree or radian) but it is dimensionless as it is the ratio of like quantities

The unit for this is Radian or Degrees.

hope this help you