Physics
The absorption of ink by blotting paper involves:

Siphon action
Viscosity of ink
Diffusion of ink through the blotting
Capillary action phenomenon

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Physics
Conservation of energy refers to the fact that

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

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