Answer:
You just double the number of boxes it goes higher. Then triple the number for the second question. But don't change the time.
To solve this problem we will apply the concept related to the electric field. The magnitude of each electric force with which a pair of determined charges at rest interacts has a relationship directly proportional to the product of the magnitude of both, but inversely proportional to the square of the segment that exists between them. Mathematically can be expressed as,

Here,
k = Coulomb's constant
V = Voltage
r = Distance
Replacing we have


Therefore the magnitude of the electric field is 
Answer:
im pretty sure its c the third answer i got that one right
Explanation:
your welcome :)
Because they have special tool's that help them find out