Physics
What factors contribute to global winds?

Uneven warming of the earth by the sun
All of these
Convection Cells
Coriolis Effect

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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 ultraviolet light from the sun on atmospheric oxygen.
Action of solar radiations particularly cosmic rays on carbon dioxide present in the atmosphere.
Lightning discharge in atmosphere.

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Physics
Why does bleeding occur through the nose in high mountainous regions ?

The blood pressure of a person increases at high altitudes
The pressure of blood in capillaries is greater than the outside pressure
The pressure at high altitudes is greater than that on the plains
The blood pressure fluctuates and finally decreases drastically

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