practice:click clear. use what you have learned to find the equivalent resistance of the circuit shown at right. show your work in the space below. use the gizmo to check your answers.

Which of the following best describes internal energy? a. the difference between the kinetic and potential energies of the particles in a system b. the sum of the kinetic and potential energies of the particles in a system c. the sum of the kinetic and thermal energies of the particles in a system d. the difference between the kinetic and thermal energies of the particles in a system