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 has no atmosphere
The moon is cooler than earth
The moon's surface is rough

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Physics
What is a compound microscope?

A microscope that has two sets of lenses : an occular lens and an eyepiece.
A microscope whose lenses are convex.
A microscope whose lenses are concave.
A microscope that has one lens.

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