David pushes on a box with a force of 11 Newtons to the right, and his friend pushes on the box with a force of 8 Newtons to the left. What is the net force acting on the box?

a

explanation:

no diagram was provided, but i'm guessing it's the one i've attached to my answer.

here, a mechanical force turns the rod.   this generates an electric current in the coil, which powers the bulb.

you get 2.3=1.21*\frac{a}2 or 4.6=1.21a or a=3.802 (b)

explanation:

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome