Physics
What is the direction of torque?

Parallel to the radius
Same as the direction of applied force
Perpendicular to the direction of applied force
Opposite to the direction of applied force

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Physics
Railway tracks are banked on curves

necessary centrifugal force may be obtained from the horizontal component weight of the train
the train may not fly off in the opposite direction
necessary centripetal force may be obtained from the horizontal component of the weight of the train
to avoid frictional force between the tracks and wheels

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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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