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

The stone conveys the heat away from the feet more rapidly than the carpet
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

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Physics
Pressure Cooker cooks faster because

The material of the cooker is a good conductor
Boiling point decreases with rise of pressure
It cooks the food at low pressure
Higher temperature is attained for cooking

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