How can an electromagnet be made stronger? A. Add more coils of wire.

B. Add an iron core.

C. All the above.

D. Increase the voltage.

All four choices are correct responses. (A), (B), (C), (D)

the focus of lesson 1 is newton's first law of motion - sometimes referred to as the law of inertia. newton's first law of motion is often stated as. an object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.

explanation:

beta is electron from nucleus

something from nucleus has changed, but charge must be same for cons of charge