Physics
Which of the following is not a valid conservation law of classical physics?

Law of conservation of charge
Law of conservation of current
Law of conservation of energy
Law of conservation of angular momentum

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Physics
It is easier for a man to swim in sea water, than in river water because

The density of sea water is lesser than the density of river water
The sea is wider than the river
The density of sea water is more than the density of river water
The sea is-deeper than the river

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