Answer:
Coulomb's law, mathematical description of the electric force between charged objects. Formulated by the 18th-century French physicist Charles-Augustin de Coulomb, it is analogous to Isaac Newton's law of gravity.
Explanation:
Soo yeah I think this can help you
A temperature change in a reaction indicates a chemical change
The plants without any fertiliser could be the control, to see what the change in the independent variable (fertiliser) does to the growth of the plant (dependant variable).
Hope that helps.
Stirring faster, heating up the substance
By stirring faster, more of the solute/solvent come in contact faster.
By heating up a substance, the same things happens.
Hope this helps!