Which postulate of the kinetic-molecular theory applies to the particles of a liquid? . a)they do not move freely but vibrate in a stationary position.. b)they can be compressed, which causes a large change in volume.. c)they have so much kinetic energy that their intermolecular forces are negligible.. d)they have enough kinetic energy to easily slide by each other.

Determine the maximum r-value of the polar equation r =3+3 cos 0

Could someone me find the answer to this problem.

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