Physics
The final image in a simple microscope is

Virtual, diminished and erect
Real, magnified and erect
Virtual, magnified and erect
Real, diminished and inverted

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

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