Help I'm timed!! Phase change materials (PCM) react to weather conditions in which of the following ways? repel moisture to protect the body from inclement weather

provide sun protection to reduce skin damage in sunny weather

store excess heat to warm the body in cold weather

wick moisture to keep the body dry in hot weather

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.