In a production woodworking shop, 50 µm spherical dust particles were blown into the air while a piece of oak furniture was being sanded.

a. find the terminal velocity of the particles as they fall through the air. b. neglecting air currents, how long would it take the cloud of sawdust to settle out of the air and fall 2 m to the ground? the density of dry oak is approximately 750 kg/m3

Steam at a pressure of 100 kpa and a quality of 50% initially fills a rigid vessel having a volume of 0.5 m^3. the steam is then heated, causing the pressure in the vessel to rise to 150 kpa. determine: i. the mass of the steam in the vessel. ii. the temperature and quality of the steam after the heating process. ii the mass of the vapour, mg and liquid, m in the vessel after the heating process. if the steam in the vessel is now further heated, what would the pressure and temperature in the vessel be when all steam has turned into saturated vapour? b. sketch the processes in part (a) and part (b) on p-v and t-v diagrams, indicating clearly the temperatures, pressures and the paths. c. (0.59kg, 111.4°c, 73%, 0.4307kg, 0.1 593kg, 2.11 bar, 121.84°c)