Physics
What is the force of attraction between any two bodies by virtue of their masses is called?

Gravitational Force
Centripetal Force
Nuclear Force
Electromagnetic Force

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

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

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