1- A science is the set of knowledges and doctrines methodically ordered relative to a given subject.
2a- Physics is the science that studies the properties of matter and energy that does not alter its nature.
2b- Mathematics is the science that studies the properties of the quantities expressed by numbers or letters.
3a- Mechanics is the branch of Physics that studies the properties of movement.
3b- Algebra is the branch of Mathematics that studies the quantity in the most general way possible using letters.
Elvis Sibilia
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