Someone suggests looking at Earth, to see how lit-up it can look, like Galileo did with Venus. Let's assume you have a telescope that can magnify Earth well enough to see any phases it might have. Would this work well, for trying to tell the difference between the heliocentric and Mercury-centric models

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