In addition to the electric force law and the magnetic force law, ...

[theo]

In addition to the electric force law and the magnetic force law, the other key principle that is needed to explain electromagnetic waves is
 
  A) electromagnetic forces can be felt across a distance.
  B) Newton's law of motion.
  C) electromagnetic fields are established instantaneously.
  D) forces always come in pairs, so for every sender of electromagnetic force there must be a receiver.
  E) electromagnetic fields are not established instantaneously.

Question 2

How do coal power plants and nuclear power plants differ?
 
  A) One has a stack--i.e., smokestack--and the other doesn't.
  B) They use different fuels.
  C) Both of the above.
  D) One uses a cooling tower or a cooling lake or river, and the other doesn't.
  E) All of the above.

[irishcancer18]

Answer to Question 1

E

Answer to Question 2

C

[theo]

Wow, this really help

[Joy Chen]

Excellent