Physics
The cause for the Tsunami, as deduced by the seismologists, is

Deformation of sea floor and vertical displacement of water
Gravitational pull of the moon
Sudden change in the monsoon wind
Low pressure trough in the ocean

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Physics
Thermohaline circulation is mainly due to

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

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Physics
Energy in reflected light :

Decreases with the increase in angle of incidence
Becomes maximum for angle of incidence equal to 45°
Does not depends on the angle of incidence
Increases with the increase in angle

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