Which of the following can explain the downward motion of water droplets during a rainfall?
Electrostatic
Magnetic
Gravitational
None of these
Which of the following property of water can be used to explain the spherical shape of rain droplets?
(a) Viscosity (b) Surface tension
(c) Critical phenomena (d) Pressure
During summer, Kavita carries water in a transparent plastic bottle to her school. One day, she left her bottle in the school. The bottle still had some water left in it. The following day, she observed some water droplets on the inner surface of the empty portion of the bottle. These droplets of water formed due to ____.
If n identical water droplets falling under gravity with terminal velocity v coalesce to form a single drop which has the terminal velocity 4v. Find the number n.