Question

Which of the following is NOT a dimensionless quantity?A. angle
B. strainC. specific gravity
D. density

Answer 1

Answer:

DENSITY

Explanation:

Which of the following is NOT a dimensionless quantity?

A. angle  

B. strain

C. specific gravity  

D. density

D. density is the correct answer

Strain is Dimensionless quantity  as it is change in Size.  So it is ratio of two same dimensions , Hence it is dimension less

Specific Gravity  is also Dimensionless quantity  as it is ratio of two Density , Hence it is dimension less

An angle symbolically has dimension .  The SI derived unit of angle is the radian, which is defined as the angle for which the radius equals the arclength.  But L/L  = 1 so its also dimensionless

density has Dimensions as  Density = Mass/Volume

so its dimension = M/L³

Only quantity here which is not dimensionless is Density

Answer 2

Answer:

Density is correct answer