14. Consider a thermodynamic equilibrium of H₂ and O₂ gases. What is the ratio of the root mean square speeds ? (A) 1/16 (B) 16 (C) 1 (D) 1/4 (E) 4

5. A boy stands on a board placed on a ice (frictionless). The mass of the boy including the board is 20 kg. When he throws a ball with mass of 1 kg to the right at the speed of 10 m/s (Fig. 2), what is the velocity of the boy and board? (A) 10 m/s to the left (B) 10 m/s to the right (C) 0.5 m/s to the left (D) 0.5 m/s to the right (E) 0 m/s