Physics
If you look into a mirror and find that the image (your reflection) is smaller than you, then the type of the mirror is:

Convex mirror
Plane mirror
Concave mirror
Plano-concave mirror

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Physics
A stone floor feels cold to the bare feet but a carpet on the same floor feels warm. This is because

The carpet is a better conductor of heat than the stone
The human body maintains a constant temperature
The floor and carpet are at different temperatures
The stone conveys the heat away from the feet more rapidly than the carpet

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