Physics
What is the principle of a ''Life Jacket"?

It decreases the volume of the person to keep him afloat
It increases the volume of the person to keep him afloat
The person can sit on it like a raft
It provides oxygen to a drowning person

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Physics
Which of the following options correctly explains the term heat budget?

It is the amount of heat which the surface of earth receives from the sun.
It is the radiation from the earth in the form of long waves.
It is the balance between incoming and outgoing radiation
It is a mode of transfer of heat through matter by molecular activity.

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Physics
Which statement best describes an igneous intrusion?

Magma is exported to an open area and forms iron
Magma explodes to the surface and forms a smooth outer layer of rock
Igneous intrusion for when ice crystals splash into lava
Magma is injected into surrounding rock forming an igneous intrusive

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