Question

Choose the correct statement

• A. Terminal velocities of rain drops are proportional to square of their radii
• B. Water proof agents decrease the angle of contact between water and fibres
• C. Detergents increase the surface tension of water
• D. Hydraulic machines work on the principle of Torricelli’s law
• E. Venturimeter measures the flow speed of compressible fluids

Answer 1

Answer: (A)

Correct answer is (a) Terminal velocities of rain drops are proportional to square of their radii