A small spherical solid ball is dropped in a viscous liquid. Its journey in the liquid is best described in the figure by :
1. Curve A
2. Curve B
3. Curve C
4. Curve D
Two drops of the same radius are falling through air with a steady velocity of 5 cm per sec. If the two drops coalesce, the terminal velocity would be
(a) 10 cm per sec (b) 2.5 cm per sec
(c) cm per sec (d) cm per sec
Two equal drops of water each of radius r are falling through air with a steady velocity
of 8 cm/s . The two drops combine to form a big drop. The terminal velocity of big
drop will be
(1)
(2)
(3)
(4) 32 cm/s
A ball of mass m and radius r is released in a viscous liquid. The value of its terminal
velocity varies linearly with
(1) 1/r only
(2) m/r
(3)
(4) m only
If the terminal speed of a sphere of gold is 0.2 m/s in a viscous liquid find the terminal speed of a sphere of silver of the same size in the same liquid
1. 0.4 m/s
2. 0.133 m/s
3. 0.1 m/s
4. 0.2 m/s