Nitrogen isotopes don't have a charge.
I'll put my answer in the comments but, part of the question is cut off do you mind putting a more readable and not sideways picture?
Answer:
c. The coefficient of kinetic friction is less than the coefficient of static friction
Explanation:
When the box finally does break loose. Then the component of the box weight which is parallel to the board weight parallel component, is equal to the
.

For the box to acce;erate thee must be non-zero net force acting on the box parallel to the board. Or we can say,

Therefore the force of kinetic friction must be less than the force of static friction. Thus,

Answer:
parallel circuit, hopefully I wasn't late in sending the answer
His new number should be: 239.2 Liters