Physics
It is difficult to cook rice

At the top of a mountain
Under a mine
Same anywhere
At the sea level

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

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.
His weight may be reduced
No frictional force may be produced between the wheels and the axle

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