If Elisha's birthday was in 6 days from now, what day would it be on? And if she was born in 2008 how old would she be turning? (I am Elisha Plus I already know the answer)

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