Physics
Consider the following statements :1. There is no net moment on a body which is in equilibrium.2. The momentum of a body is always conserved.3. The kinetic energy of an object is always conserved.Which of the statements given above is/are correct?

1, 2 and 3
1 and 2 only
1 only
2 and 3 only

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

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Physics
When a pail of water is swung in a vertical circle, the water does not fall out at the top of the loop when the speed is

Above a certain minimum value irrespective of amount of water in the pail
Above a certain minimum value depending on amount of water in the pail
Below a certain minimum value irrespective of amount of water in the pail
Below a certain minimum value depending on amount of water in the pail

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