An electromagnet is the most powerful type of magnet there is. It is a magnet with a current running through it that can be turned on and off .Why might it be useful to be able to turn the electromagnet on and off? to control the strength of the magnet

to reduce wearing out of the magnet over time

to latch onto and let go of objects

to not waste electricity

Astable electron arrangement for an atom is one that does not easily change. how is this arrangement arrived at? a. valence electrons are transferred or shared to create a full outer shell of electrons. b. valence electrons are discarded into space to create a full outer shell of electrons. c. protons (positive charge) pair with valence electrons (negative charge) to create a strong bond. d. outer shells with valence electrons are transferred or shared.

What is the molarity of the solution produced when 145 g of nacl is dissolved in sufficient water to prepare 2.75 l of solution?

Is a chemical message sent by another individual.