Physics
In the case of bodies falling under gravity which of the following remains constant at a given place?

Potential energy
Acceleration
All listed here
Kinetic energy

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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:

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

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