Physics
The Law of Kepler is related with which among the following ?

None
Law of Gravitation
Planetary Motion
Law of Conservation of energy

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Physics
Radiocarbon is produced in the atmosphere as a result of

Collision between fast neutrons and nitrogen nuclei present in the atmosphere.
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
Action of ultraviolet light from the sun on atmospheric oxygen.
Lightning discharge in atmosphere.

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Physics
Hydro-electric power is a:

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

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