Who would have the most potential energy? A. A 80 kg student sitting in the bottom row of the bleachers.
B. A 80 kg student sitting up in the top row of the bleachers.
C. A 65 kg player running down the court.
D. A 65 kg player walking down the court.

Two identical small charged spheres are a certain distance apart, and each one initially experiences an electrostatic force of magnitude f due to the other. with time, charge gradually leaks off of both spheres. when each of the spheres has lost half its initial charge, the magnitude of the electrostatic force will be

Atomic nuclei of almost all elements consist of

Jenny wants to test the electrical conductivity of two substances dissolved in water. she is preparing the containers for the experiment. which factor is most important for her to control? a) volumes of the solutions b) appearance of the solutions c) temperatures of the solutions d) concentrations of the solutions