40 POINTS
Which of Newton's laws is demonstrated by the "tablecloth trick" ?
A) first law
B) second law
C) third law

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