Q2. Define the following terms. a) Molecule b) Absolute pressure c) Archimedes' principle d) Heat Capacity e) Thermal Energy (10 Marks) Q3. Solve the following. a) The pressure of a gas contained in a cylinder with a moveable piston is 200Pa. The area of the piston is 0.5 m 2. Calculate the force that is exerted on the piston. b) A tank of oil is 3m deep. If the tank is half full and the density of oil is 875kg/m3. Determine the pressure on the base of the tank.Q4. What is the need for a barometer? Explain the construction and principle of operation of a barometer with the help of a neat diagram. ( 15 Marks) Q5. Explain Conduction, Convection and Radiation methods of heat transfer with the help of one example each. ( 20 Marks) Q6. Solve the following a) The power of the immersion heater is 120 Watts. In 10 minutes, the reading falls from 482g to 474g. What is the specific latent heat of water? b) 5.7MJ of heat energy is supplied to 30kg of aluminium that is initially at a temperature of 20C .If the specific heat capacity of aluminium is 950J/kg C, determine its final temperature ? ( 15 Marks) Q7. With the help of a Heat- Temperature graph for 1g of ice-water- steam, neatly label the graph and explain what is latent heat of fusion, latent heat of vaporization and sensible heat