Physics
According to special theory of relativity the mass of a particle

Is independent of its velocity.
Decreases with increase in velocity.
Decreases with decrease in velocity.
Increases with increase in velocity with respect to an observer.

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Physics
Absolute Zero is defined as

The temperature at which all molecular motion ceases
At which the volume becomes zero
At which liquid Helium boils
At which water boils at 298K

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