Internal Combustion Engines
The reason for supercharging in any engine is to

Effect fuel economy
Reduce weight and bulk for a given output
Increase power
Increase efficiency

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Internal Combustion Engines
The tangential velocity of the water element having a free vortex is

Inversely proportional to its (distance)2 from the centre
Inversely proportional to its distance from the centre
Directly proportional to its (distance)2 from the centre
Directly proportional to its distance from the centre

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