Question

Which of the following quantities has not been expressed in proper unit?

• A. $\text{torque, newton meter}$
• B. ${\text{stress, newton meter}}^{-2}$
• C. ${\text{modulus of elasticity, newton meter}}^{-2}$
• D. ${\text{surface tension, newton meter}}^{-2}$

Answer 1

The correct option is D ${\text{surface tension, newton meter}}^{-2}$

Surface tension is given as force per unit length, so, its unit will be ${\text{newton meter}}^{-1}$