Acylinder contains a gas at at absolute pressure of 120 kpa. the piston has a mass of 20 kg and the diameter is 25 cm. a) find the local atmospheric pressure. b) if we want to increase the pressure of the gas in the cylinder by three times by adding weight, determine the amount of weights (w) that must be added.

Burgers vector is generally parallel to the dislocation line. a)-true b)-false

Atmospheric air has a temperature (dry bulb) of 80° f and a wet bulb temperature of 60° f when the barometric pressure is 14.696 psia. determine the specific humidity, grains/lb dry air. a. 11.4 c. 55.8 d. 22.5 b. 44.1

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.