C. Making spikes on shoes because it doesn’t cause friction (i think)
fyt as per the question the magnitude of two like charges are given as q1 and q2.the separation distance is given as r unit.hence the potential energy is given as-
here the potential energy is positive which means the force between two charges is repulsive.the potential energy is maximum which indirectly denotes that the system is unstable.due to this repulsion the smaller charge may accelerate.
coming to the same charges of opposite nature i.e unlike charges-here the magnitude of charges are same and separation distance is also are,so the potential energy will be given as-
here the potential energy is negative .so the system of two charges are attracted by each other.
I think it probably because the steel ship has more surface area then the the marble
hope i helped
no because nuclear energy come from kinetic not potential energy. burning a wax candle is an example of heat/thermal energy .