Physics
A person can jump higher on the moon's surface than on the earth because :

The acceleration due to gravity in moon is smaller than that on the earth.
The moon is cooler than earth
The moon's surface is rough
The moon has no atmosphere

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Physics
Mica is used in electrical appliances such as electric iron because mica is

a bad conductor of heat as well as electricity
a good conductor of heat but a bad conductor of electricity
a good conductor of heat as well as electricity
a bad conductor of heat but a good conductor of electricity

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