Physics
Vehicle tyres are inflated properly

To avoid skidding and to minimise friction
To allow the vehicle to take more load.
To go fast and save fuel.
To ensure smooth running.

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Physics
Thermohaline circulation is mainly due to

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

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