Find the average magnitude of linear momentum of a helium molecule in a sample of helium gas at 00C. Mass of a helium molecule = 6.64 × 10−27 kg and Boltzmann constant 1.38 ×10−23 J K−1.
The average translational kinetic energy of air molecules is 0.040 eV (1 eV = 1.6 ×10−19 J). Calculate the temperature of the air. Boltzmann constant k = 1.38 ×10−23J K−1