Atwelve-foot ladder is leaning against a wall. if the ladder reaches ft high on the wall, what is the angle the ladder forms with the ground to the nearest degree?

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