Physics
On which principle does the hydraulic lift works?

Archimedes's law
Newton's law
Joule's law
Pascal's law

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Physics
The earth is a

Non-absorber of heat
Good absorber and good radiator of heat
Good reflector of heat
Bad absorber and bad radiator of heat

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Physics
Stars twinkle because

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

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