Physics
Find the power of a convex lens if the image formed is at a distance of 25 cm from the lens when the object is placed on the other side of the lens at 12 cm from the optical centre?

-12.33 diopters
4.33 diopters
12.33 diopters
-4.33 diopters

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Physics
Conservation of energy refers to the fact that

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

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