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1.Calculate the required area of an air to air heat exchange to cool 20,000 cfm from 1200 F to 400 F. Assume ambient air at 80 F will be heated to 800 F by the exchange. Assume heat losses are 10 % and that the overall heat transfer coefficient is 1.0 Btu/hr-ft^2- °F
2.Argon is expanded in an isentropic turbine from 2 MPa and 500oC to 200 kPa. Determine the outlet temperature and the work produced by this turbine per unit mass of argon.
3.Saturated R-134a vapor enters a compressor at 0 degrees F. At compressor exit, the specific entropy is the same as that at the inlet, and the pressure is 60 psia. Determine the R-134a exit temperature and the change in the enthalpy of R134a.
4.A large steel tower is to be supported by a series of steel wires; it is estimated that the load on each wire will be 19,000N. Determine the minimum required wire diameter assuming a factor of safety 5 and that the yield strength of the steel is 900MPa.
If a watershed of drainage area 100 mi^2 has abstractions of 2.5 in/hr, what runoff volume will show up in the nearby stream in addition to baseflow for a rainfall of 5-hr duration with an intensity of 4 in/hr
Estimate the number of filters required and calculate the area of each filter (ft2), assuming that a length-to-width ratio (L:W) of 4:1 is employed in constructing the rapid sand filters and suing a filtration rate of 6 gpm/ft2.
the device shown is used in the semiconductor industry to polish silicon wafers. the wafers are placed on the faces of
Write out the steps for the aldol condensation reaction between the enolate anion of propanal with pentanal.
Calculate the percipitable water (mm) in a 10-km high standard atmoshperic column if the surface conditions are temperature=20 degrees C, pressure=101.3 kPa and the laspe rate is 6.5 degrees C/km.
How does the engineering classification of soils differ from he engineering classification of rocks
The bar is prevented from rotating by the two pegsA and B fixed to the plate. Determine the acceleration a of the plate for which no force is exerted on the bar by either peg A or B.
a vertical triangular orifice in the wall of a reservoir has a base 0.9m long0.6m below its vertex and 1.2 m below the
A particle is traveling in a straight line at a constant speed of 22.9 m/s. Suddenly, a constant force of 10.7 N acts on it, bringing it to a stop in a distance of 63.6 m.
The inflow to a small reservoir during a storm may be described by the equations Q=1000(1-e^-kt) where Q= flow in cfs k= runoff rate = 1.0 per hour t = time in hours The outflow through the dam gates is held constant at 800 cfs.
Use Stoke’s Law to calculate the settling velocity (m/s) of a spherical particle with a diameter of 1.0 mm and a density of 3 g/mL in water at a temperature of 30?C. The dynamic viscosity of water at 30?C is 0.798 x 10-3 N s/m2. The density of water ..
1. the u.s. has produced the following quantity of gauges and potatoes with the price of each listed in dollar
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