Engineering, 06.05.2020 03:26 dessssimartinez6780
One kilogram of propane initially at 8 bar and 50 ℃ undergoes a process to 3 bar, 20 ℃ while being rapidly expanded in a piston-cylinder assembly. Heat transfer between the propane and its surroundings occurs at an average temperature of 35 ℃. The work done by the propane is measured as 42.4 kJ. Kinetic and potential energy effects can be ignored. Determine the amount of entropy produced or destroyed and whether it is possible for the work measurement to be correct.
Answers: 2
Engineering, 04.07.2019 18:10
The higher the astm grain-size number, the coarser the grain is. a)-true b)-false
Answers: 3
Engineering, 04.07.2019 18:10
Compute the pressure drop of 30°c air flowing with a mean velocity of 8 m/s in a circular sheet-metal duct 300 mm in diameter and 15 m long. use a friction factor, f 0.02, and pair = 1.1644 kg/m a. 37.26 pa b. 25.27 pa n c. 29.34 pa d. 30.52 pa
Answers: 1
Engineering, 04.07.2019 18:20
Acertain flow of air (at stp) has a velocity distribution given by v i (in ft/s). if this flow is going through a 4 ft square area in the yz-plane (centered at the origin), what is the mass flow rate (in lbm/s)?
Answers: 2
Engineering, 04.07.2019 19:10
An electric kettle is made out of stainless steel, weighs two pounds (when empty) and is equipped with a heating element that consumes 2 kw of electricity. assuming that the water and the kettle are at the same uniform temperature at any moment of time, calculate the shortest possible time to bring 2 quarts of water from room temperature to the onset of boiling
Answers: 2
One kilogram of propane initially at 8 bar and 50 ℃ undergoes a process to 3 bar, 20 ℃ while being r...
Mathematics, 03.07.2020 18:01
Mathematics, 03.07.2020 18:01