When an atom is placed in a uniform external electric field , the energy levels are shifted—a phenomenon known as the Stark effect (it is the electrical analog to the Zeeman effect). In this problem we analyze the Stark effect for the and states of hydrogen. Let the field point in the z direction, so the potential energy of the electron is

What do you think car designers do if the damage caused by a crash test is too severe?

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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