Physics
When heated from 0 to 100oC volume of a given mass of water will :

Decrease gradually
Increase gradually
Increase and then will decrease
Decrease and then will increase

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Physics
Stars twinkle because

the distance of the stars from the earth changes with time.
the intensity of light emitted by them changes with time.
None of these
the refractive index of the different layers of the earth's atmosphere ch

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