Physics
An aircraft can perform aerobatic manoeuvres in a vertical loop because of

Weight
Gravity
Centripetal force
Centrifugal force

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Physics
An integrated circuit is more advantages than a coventional circuit because

They make the electric equipments more reliable and easier for servicing
A faulty part of a conventional circuit may be difficult to locate and repair
If a part of the integrated circuit fails the entire circuit is simply replaced
All listed here

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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 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
The floor and carpet are at different temperatures

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Physics
Super conductors are substances that

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

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