Physics
An optically plane surface reflects a beam of light

As diffused beams in all directions
As parallel beams in all directions
As a parallel beam in one direction
As a diffused beam in one direction

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Physics
Thermohaline circulation is mainly due to

Winds causing circulation of ocean water
Cold, dense ocean water sinking and warmer water replacing it
Warm water being added to the ocean due to industial waste
Warmer, less dense water sinking in the ocean and cold water replacing it

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