Q2: A truck is moving at a speed of 1500 m/min in a 3 m2x10 km subway during a summer day of 30 C and at atmospheric pressure of 0.75 m Hg. The speed of the air (ideal gas) that day was 8200 m/h behind the truck. Calculate, a) the rate of energy needed to push the truck in the direction of the air? b) The outlet cross-sectional area of the subway