Physics
Rain drops fall from great height. Which among the following statements is true regarding it?

Their velocity increases and they fall with different velocity on the earth
They fall with same ultimate velocity
Their velocity increases and they fall with same velocity on the earth
They fall with that ultimate velocity, which are different for different droplets

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Physics
On a clean glass plate a drop of water spreads to form a thin layer whereas a drop of mercury remains almost spherical because:

cohesion of water is greater than its adhesion with glass.
cohesion of mercury is greater than its adhesion with glass.
mercury is a metal.
density of mercury is greater than that of water.

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