Answer: D Medium B is denser than Medium A because light bends more in Medium B.
Explanation: The more the light bends the less energy it has
The Correct answer to this question for Penn Foster Students is: 214.4 J
Answer:
(a) 
(b) The force is repulsive
Explanation:
a) According to Coulomb's law, the magnitude of the electrice force that one particle exerts on the other is defined as:

Here k is the coulomb constant,
and
are the signed magnitudes of the charges and d is the distance between them.

b) According to Coulomb's law, if the two charges have the same sign, the electrostatic force between them is repulsive.
Using a=f/m u get 100 bc 5/.05 =100m/s
9.8m/s^2, i’m not sure what you are asking