Under steady state, a compressor is used to increase the pressure of an ideal gas air from 100 kpa to 1 mpa. meanwhile the temperature is also raised from 300 k to 500 k. to be safe, a separate stream of water is used to cool the air down to 320 k while the pressure of air remains unchanged during the cooling process. the temperature of the cooling water increases from 15°c to 30°c, while the pressure of the cooling water remains the same at 1 bar approximately. assume the kinetic and potential energy change is negligible, there is no stray heat transfer from the heat exchanger to the surroundings. draw a p-v diagram, one for air identify state 1 to 3 on air p-v diagram. show work for how to obtain relative pressures and temperatures for this p-v diagram.

Multiple choice. choose the one alternative that best completes the statement or answers the question. 1) if the force on an object is in the negative direction, the work it does on the object must be 1) a) negative. b) positive. c) the work could be either positive or negative, depending on the direction the object moves. 2) a truck has four times the mass of a car and is moving with twice the speed of the car. if kt and kc refer to the kinetic energies of truck and car respectively, it is correct to say that 2) a) kt = 16kc . b) kt = 1 2 kc. c) kt = kc . d) kt = 2kc . e) kt = 4kc . 3) you and your friend, who weighs the same as you, want to go to the top of the eiffel tower. your friend takes the elevator straight up. you decide to walk up the spiral stairway, taking longer to do so. compare the gravitational