The tesla roaster is 1300kg and accelerated at 13.9m/s^2. If the force of friction acting on the car is 2800N, how much force does the engine exert?

when it gains or loses electrons

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

the order for strong to weak forces such as

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

the fundamental forces are those forces that act between to objects or element to make interactions. there are four types of fundamental forces such as strong and weak nuclear forces (due to protons and electrons), electromagnetic force (due to the motion of electrons) and gravitational force (due to orbital movement of the planet). if these forces are arranged on the basis of their maximum strength then the order is

strong nuclear force → electromegnetic force → weak nuclear force → gravitational force

3. dark matter

empty space could also be a simple vacuum