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Steam enters a long, horizontal pipe with an inlet diameter of D1 12 cm at 1 MPa and 300°C with a velocity of 2 m/s. Farther downstream, the conditions are 800 kPa and 250°C, and the diameter is D2 = 10 cm. Determine
(a) The mass flow rate of the steam and
(b) The rate of heat transfer.
Calculate the emissions of sulfur dioxide, particulates (fly ash), and carbon dioxide per kilowatt-hour of electrical energy produced. Assume that all of the carbon in the coal is released to the atmosphere.
A horizontal rectangular concrete channel terminates in a free outfall. The channel is 4m wide and carries a discharge of water 12 cms. What is the water depth 300 m upstream from the outfall
Stripping overburden in the Illinois coal belt, the Dusty Coal Company uses 270-horsepower, track-type tractors (with direct-drive transmissions) and drawn scrapers. The overburden is a very soft loam that weighs 2,800 lb/yd (loose). Estimated RR fac..
A 10-year, 12%, $1,000 bond that pays dividends quarterly can be purchased for $900. If the bond is purchased and pays as scheduled, calculate the nominal and the effective rate of return that the purchaser receives.
Compute the atomic packing factor for the diamond cubic crystal structure. Assume that bonding atoms touch one another, that the angle between adjacent bonds is 109.5, and that each atom internal to the unit cell is positioned a/4 of the distance awa..
A 0.4m^3 moist soil sample has the following: Moist mass = 711.2 kg, Dry mass 623.9 kg, Specific gravity of soil solids = 2.68
Sketch the flow field defined by u=3y, v=2 and derive expressions for the x and y components of acceleration. Find the magnitude of the velocity and acceleration for the point having the coordinates (3,4). Specify units in terms of L and T.
The service loads on a steel truss member are PDL: 120 kips (tension), PLL =240 Kips (tension), PWL = 200 kips (tension/compression). Steel properties are Fy = 46 ksi, Fu = 58 Ksi. Using the tables in the AISC manual, make a preliminary selection of ..
the present worth of an increasing geometric gradient is $23,632. The interest rate is 10% per year, and the rate of change is 4% per year. If the cash flow amount in year 1 is $3000
If we compare brass and bronze having 90% copper, brass (alloy with zinc) will have less yield strength than bronze (alloy with tin). Why?
a 50cm^3 sample of dry soil from an aquifer weighs 100g. when it is poured into a graduated cylinder, it displaces 35cm^3 of water. What is the porosity of the soil. What is the average density of the actual solids contained in the soil
Draw block diagrams of the unit operations necessary to treat the following wastes to effluent levels of BOD5 = 200 mg/L, SS = 100 mg/L, P = 5 mg / L (required for discharge into a sanitary sewer).
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