I need this asap thank you :) pl When the spring on a mousetrap car is fully unwound, the force acting on the car is . a. the combination of friction and the force of the lever arm pulling on the axle

b. equal to the input force of the spring

c. only friction

d. gone

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.