Physics
What principle/law explains the working of the hydraulic brakes in automobiles ?

Archimedes' principle
Pascal's law
Posieulle's principle
Bernoulli's law

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Physics
Specific gravity is defined as the ratio of

Density of the substance to the density of water at 0°C
Density of water at 4°C to the density of the substance
Density of the substance to the density of water
Density of the substance to the density of water at 4°C

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