Physics
In a refrigerator what produces the cooling ?

None of these
The ice which deposits on the freezer
The evaporation of a volatile liquid
The sudden expansion of a compressed gas

ANSWER DOWNLOAD EXAMIANS APP

Physics
Conservation of energy refers to the fact that

If you conserve energy you will not be as tired
The entropy of the universe is always increasing
No chemical reaction is 100 percent efficient
Energy cannot be created or destroyed but can be converted from one form to another

ANSWER DOWNLOAD EXAMIANS APP