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

The floor and carpet are at different temperatures
The human body maintains a constant temperature
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

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Physics
Super conductors are substances that

Offer minimum resistance to flow of electric current
Conduct electricity at high temperature
Offer high resistance to the flow of electric current
Conduct electricity at low temperature

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