Physics
Q = mcdT refers to

Specific Heat formula
Heat Transfer formula
Heat of Vaporization
Enthalpy formula

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

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

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Physics
A boy is swinging a ball attached to a string in a horizontal circle. If the string snaps

None of these
The ball will travel towards the center of the circle and fall down
It will fall down at the same place where the string breaks
It will continue to travel along a tangent to the circle at the point the ball was at the time of snapping and finally fall down

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