Jerry drove from Bright Town to Happy Town at an average speed of 64 km/h. Two hours after Jerry started driving, Harry started driving from Happy Town to Bright Town at an average speed of 96 km/h. When Jerry reached Happy Town, Harry was still 32 km away from Bright Town. What was the distance between the 2 towns

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