Physics
The motion of a freely falling body is an example of ________ motion.

Non-uniformly accelerated
Constant velocity
Uniformly accelerated
Constant speed

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Physics
What is a compound microscope?

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

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Physics
Skating on ice is possible because

The pressure on the ice due to skate raises its melting point
The pressure on the ice due to skate melts the ice by lowering its melting point forming a thin film of water
The surface of ice is smooth
Ice is cold

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