Answer:
a)
, b) 
Explanation:
a) The potential energy is:



b) Maximum final speed:

The final speed is:


The total capacitance of two 15uF capacitors connected in parallel is <em>30 μF</em> .
Answer:
light doesn't need a medium through which to travel because the speed of light is experimentally constant
Answer:
-0.045 N, they will attract each other
Explanation:
The strength of the electrostatic force exerted on a charge is given by

where
q is the magnitude of the charge
E is the electric field magnitude
In this problem,

(negative because inward)
So the strength of the electrostatic force is

Moreover, the charge will be attracted towards the source of the electric field. In fact, the text says that the electric field points inward: this means that the source charge is negative, so the other charge (which is positive) is attracted towards it.
Answer:
this is a difficult question but I will try to answer it answer for this is 3220 a + b b u s y d l new