Physics
For an ideal gas, which one of the following statements does not hold true?

The speed of all gas molecules is same
The kinetic energies of all gas molecules are not same
There is no interactive force between the molecules.
The potential energy of the gas molecules is zero

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Physics
Hydro-electric power is a:

A mixture of renewable and non-renewable natural resource
Renewable natural resource
Neither renewable nor non renewable resource
non-renewable natural resource

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Physics
The wall of a dam is broader at the base

To withstand pressure that is increased with atmospheric pressure
To withstand pressure that increases with depth
To withstand pressure that increases in a horizontal plane
Because streamlining is required

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