Question

If the terminal speed of a sphere of gold (density=19.5 kgm^-3) is 0.2 ms^-1 in a viscous liquid (density = 1.5 kgm^-3), find the terminal speed of a sphere of silver (density =10.5 kg/m³) of the same size in the same liquid.

(a) 0.4 ms^-1

(b) 0.33 ms-¹

(c) 0.1 ms^-1

(d) 0.2 ms-¹

Answer 1

Correct Option (c) 0.1 ms^-1

Explanation:

Terminal speed of spherical body in a viscous liquid is given by