Engineering, 05.10.2019 14:30 Daud2020
Awell-insulated rigid tank contains 3 kg of saturated liquid-vapor mixture of water at 250 kpa. initially, three-quar- ters of the mass is in the liquid phase. an electric resistance heater placed in the tank is turned on and kept on until all the liquid in the tank is vaporized. assuming the surroundings to be at 25°c and 100 kpa, determine (a) the exergy destruction and (b) the second-law efficiency for this process.
Answers: 1
Engineering, 04.07.2019 18:10
Ariver flows from north to south at 8 km/h. a boat is to cross this river from west to east at a speed of 20 km/h (speed of the boat with respect to the earth/ground). at what angle (in degrees) must the boat be pointed upstream such that it will proceed directly across the river (hint: find the speed of the boat with respect to water/river)? a 288 b. 21.8 c. 326 d. 30.2
Answers: 3
Engineering, 04.07.2019 18:10
Condition monitoring is a major component of. (clo4) a)- predictive maintenance. b)-preventive maintenance c)-proactive maintenance d)-reactive maintenance.
Answers: 1
Engineering, 04.07.2019 18:20
Water vapor initially at 10 bar and 400 °c is contained within a piston-cylinder assembly. the water lost heat to the surrounding according to isochoric (iso-volumetric) process until its temperature is 150 °c. the water is then condensed isothermally to saturated liquid. for the water as a system, calculate the work in kj/kg
Answers: 2
Engineering, 04.07.2019 19:10
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.
Answers: 2
Awell-insulated rigid tank contains 3 kg of saturated liquid-vapor mixture of water at 250 kpa. init...
Mathematics, 18.03.2021 02:50
Chemistry, 18.03.2021 02:50
Engineering, 18.03.2021 02:50
Mathematics, 18.03.2021 02:50
Chemistry, 18.03.2021 02:50
Mathematics, 18.03.2021 02:50
Biology, 18.03.2021 02:50
History, 18.03.2021 02:50