Answer:
180 miles/hr
Explanation:
15 min=1/4 hr
s= distance/time
s=45miles/1/4 hr
s=45miles x 4/1=180 miles/hr
Each electron has a charge of

In this problem, the total charge is

Therefore, the number of electrons contained in this total charge will be given by the total charge divided by the charge of a single electron:

Answer:
2
Explanation:
A rigid body is not elastic.
i.e. it does not change shape.
From my experience, I would say it is true.