Question

name four physical quantities which are

dimensionless
​

Answer 1

Answer:

All pure numbers are dimensionless quantities, for example 1, i, π, e, and φ. Units of number such as the dozen, gross, googol, and Avogadro's number may also be considered dimensionless. Coefficient of friction , refractive index are also dimensionless.

Answer 2

Answer:

angle , radian , trigonometric values