1. Two identical glass tubes S, and Sz are filled with a small amount of liquid L to the same height. The variation of the density of liquid L between temperatures T, and T2 is shown. density temperature T 2 Objects A and B are at initial temperatures 0, and 02 respectively. S, is put in thermal contact with A, and after attaining thermal equilibrium, the height of liquid column in S, is h . Likewise, S, is put with B and after thermal equilibrium the height of the liquid column in S2 is h2. Assume there is no heat lost to the surroundings and the energy absorbed by the glass tubes is negligible. (a) In which temperature range does liquid L keep expanding with increasing temperature? Why? (2 marks) (b) Peter claims that 'If h, = hy then 0, = 02'. Do you agree? Why? (2 marks) (c) If both A and B are heated, h, will increase and h, will decrease. Referring to the graph, what is/ are the range of values of 0, and @2? (2 marks) (d) Instead of heating A and B, the two objects are put in thermal contact with each other. What happen to h, and hy? Briefly explain