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1.A piston-cylinder device contains helium gas initially at 150 kPa, 20 degrees C, and 0.5 m^3. The helium is now compressed in a polytropic process (PV^n = constant) to 400 kPa and 140 degrees C. Determine the heat loss or gain during this process.
2.A mass of 12 kg saturated refrigerant-134a vapor is contained in a piston-cylinder device at 240 kPa. Now 300 kJ of heat is transferred to the refrigerant at constant pressure while 110-V source supplies current to a resistor within the cylinder for 6 min. Determine the current supplied if the final temperature is 70 degrees C. Also, show the process on a T-v diagram with respect to the saturation lines.
When Eurasia restaurant, serving Eurasian cuisine, first opened along Chicago's Michigan Avenue, its novelty brought many diners.
Input parameters for the function should be the lower and upper bounds of the root. Obtain reasonable values for the lower and upper bounds by graphing the function in Excel. Turn in your code for the VBA function.
Estimate the energy required to raise the temperature of 2 kg (4.42 lbm) of the following materials from 20°C to 100°C (68°F to 212°F): aluminum, steel, soda-lime glass, and high-density polyethylene.
This distance is indicated correctly on a steel surveyor's tape whenused at a temperature of 70 degrees F and subjected to a pull of 10lbs. If in measuring a certain distance the tape indicatesthe distance to be 100 feet
A fine-bubble aeration basin has a flow of 21.5 mgd, an influent BOD of 180 mg/l, 31 mg/l of mmonia, and effluent of 10 mg/l. During the winter, the wastewater temperature of 14.8 degrees C does not nitrify.
What are the effects of degree of hydration on capillary pore volume, capillary pore size, porosity, permeability, and compressive strength of hydrated cement (Degree of hydration: hydrated cement/total cement, increases with time and temperature)
the flow into the lake is from is from a stream is 300 m3/d andthe flow into the lake from runoff averages 20 m3/d. The lake is used for fishing by the local residents but the pesticides from local farms may damage the fish population.
(a) What are some of the important properties of unalloyed copper that make it an important industrial material (b) How is copper extracted from copper suflide ore concentrates
Two piezometers are located 1000 ft apart with the bottom located at depths of 50 ft and 350 ft, respectively, in a 400-ft-thick unconfined aquifer. The depth to the water table is 50 ft in the deeper piezometer and 40 ft in the shallow one.
Need to prepare the CAD drawings
At a temperature of 60 F, a .04 in gap exists between the ends of the two bars. Bar 1 is an aluminum alloy [E=10,000ksi, v=.32, alpha=12.5x10^-6/F] bar with a width of 3 in and a thickness of .75 in.
At a plant making MSG (monosodium glutamate) for use inAsian cooking the waste stream discharged to a nearby streamcontains 100 mg of glutamic acid(C5H9O4N) per liter.
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