Physics
A cyclist leans inwards when he is negotiating a curve so that

His weight may be reduced
He may increase his speed
Necessary centripetal force may be available from the horizontal component of the normal reaction due to the track to maintain the curved motion.
No frictional force may be produced between the wheels and the axle

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Physics
A white and smooth surface is

Good absorber and bad reflector of heat
Bad absorber and good reflector of heat
Good absorber and good reflector of heat
Bad absorber and bad reflector of heat

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Physics
Which of the following is not a property of heavy water ?

It produces corrosion
Boiling point of heavy water is lower than that or ordinary water
Freezing point of heavy water is higher than that of ordinary water
Density of heavy water is higher than that of ordinary water

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