If a drop of water falls on a hot plate, it takes long time to evaporate. Why?

Determine the radius of a drop of water falling through air, if it covers 4.1 cm in 4 seconds with a uniform velocity.[density of air 0.001293 g cm^-3 , viscosity of air = 1.8xx10^-4 poise]

Two equal drops of water are falling through air with a steady velocity of 10 cm/s. If the two drops recombine to a single drop, what will be the terminal velocity

Two equal drops of water are falling through air with a steady velocity of 0.1m/s. if the drops coalese, what will be its velocity?

27 identical drops of water are falling down vertically in air with a terminal velocity 0.15 m//s . If they combine to from a single bigger drop, what will be its terminal velocity.

A milkman adds a very small amount of baking soda to fresh milk Why does this milk take a long time to set as curd?

Two drops of water of same size are falling through air with terminal veloity 10m/s. if the two drops coalese to form a single drop, what will be the new ternimal velocity?

A ball is projected horizontally from certain height. At the same time another ball is dropped? Which of the two will land on the ground first? Why?

The triple-point of water is a standard fixed point in modern thermometry.Why? What is wrong in taking the melting point of ice and the boiling point of water as standard fixed points (as was originally done in the Celsius scale)?

Give the magnitude and direction of the net force acting onfa) a drop of rain falling down with a constant speed. (b) a cork of mass 10 g floating on water. (c) a kite skillfully held stationary in the sky. (cf) a car moving with a constant velocity of 30 km/h on a rough road.