Electromagnets can be turned off, this makes it easier to release things from the magnetic field.
Hope this helps :)
Electric energy??? there isn't much information from the question but I can infer it's electricity.
Answer:
Matter can be changed, but not created or destroyed.
Explanation:
Matter can change for through physical and chemical changes, though this happens, matter is conserved. The same amount of matter exists before and after the change.
Answer:
The enthalpy of fusion of a substance, also known as heat of fusion, is the change in its enthalpy resulting from providing energy, typically heat, to a specific quantity of the substance to change its state from a solid to a liquid, at constant pressure.
