Physics
Who among the following is credited for the Corpuscular theory of light?

James Clerk Maxwell
Albert Einstein
Christiaan Hyugens
Isaac Newton

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Physics
Railway tracks are banked on curves

necessary centripetal force may be obtained from the horizontal component of the weight of the train
the train may not fly off in the opposite direction
to avoid frictional force between the tracks and wheels
necessary centrifugal force may be obtained from the horizontal component weight of the train

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