. Chapter Review Questions and Problems 1. Vector A has magnitude of Sunits and makes an angle of 45° with the positive Vector B also has the same magnitude of Sunits and directed along the negative - Find a. The magnitude and direction of A+ B b. The magnitude and direction of A - B - 37 - 41+ 45 R1+30 2 7​

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