Physics
Damp clothes are dried in spin dryers by the action of

Centripetal forces
Centrifugal forces
Non central forces
Central forces

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Physics
Which of the following is not a property of heavy water ?

Boiling point of heavy water is lower than that or ordinary water
Freezing point of heavy water is higher than that of ordinary water
Density of heavy water is higher than that of ordinary water
It produces corrosion

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Physics
Conservation of energy refers to the fact that

No chemical reaction is 100 percent efficient
If you conserve energy you will not be as tired
The entropy of the universe is always increasing
Energy cannot be created or destroyed but can be converted from one form to another

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