Calculate the thermal inertia for water, sand and rock. Then Rank them from low to high. Material Density (kg / m^3) Specific Heat Capacity (J kg^-1 K^-1) Thermal Conductivity (Wm^-1K^-1)

Water 997 4200 0.5918
Sand 1602 830 0.27
Rock 2700 880 2.5

10 kg of co2 is initially contained at 400 kpa and 300 k. the gas constant for carbon dioxide is 189 j/lkg k) and has a specific heat ratio, k, of 1.289. isentropic expansion then occurs until the pressure is 200 kpa. a) determine the initial volume of co2 in m. b) determine the final temperature in k. c) determine the work done by the system during the expansion kl.