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Aluminum is to be used as windows for a cell for X-ray absorption measurements with the Ag Ka line. The mass absorption coefficient for aluminum at this wavelength is 2.74; its density is 2.70 g/cm3. What maximum thickness of aluminum foil could be used to fabricate the windows if no more than 3.5% of the radiation is to be absorbed by them?
steam is generated in a boiler. if the initial water enters the boiler as saturated water at 1000 psi a h542.4 btuibm
The heat offusion of aluminum is 3.97 10^5 J/kg; the heat of fusion of mercury is 1.18 10^4. What is the effeciency of this engine?
Steam enters the condenser (heat exchanger) of a steam power plant at 20kPa and a quality of 95% with a mass flow rate of 20,000kg/h. A nearby river is used as a source of cooling water where the water will circulate through the tubes within the cond..
Suggest five possible problems that could arise if a company does not develop effective configuration management policies and processes. What are the benefits of using a change request form as the central document in the change management process?
Hot combustion gases of a furnace are separated from the ambient air and its surroundings, which are at 25 C, by a brick wall that is 0.15m thick. The brick has a thermal conductivity of 1.2 W/mK and a surface emissivity of 0.8.
Calculate the velocity v of the collar as it hits the stop at B if it is elevated from rest at A by the action of the constant 40-N force in the cord. The cord is guided by the small fixed pulleys.
a centrifugal pump has d1 6 inches d2 14 inches b1 5 inches b2 4 inches beta1 20 degrees beta2 45 degress and rotates
Video V1 starts the process with "Introduction to rolling bearings". The video number is noted after the question. 1. List three different types of bearings and one of these specific bearing's properties. V1
A certain u-235 fueled pressurized water reactor is just critical. Suddenly the average coolant temperature falls from 300c to 280c \alphat=-0.0001 \deltak/c. How much reactivity is inserted? What is the new value of keff?
An airplane weighing 70000 lb is in a cruise flight (constant altitude, constant velocity, level flight) at an altitude of 30000 ft, with a velocity of 0.5 Mach. Its wing area is 4000 ft2. Given the drag polar of the airplane as CD=CD,0+0.05CL2; CD,0..
If the sphere is made of steel (E=210 Gpa, poison ratio=0.29 ) and the internal pressure is 10MPa, the radius of the sphere is 0.5m, and the wall thickness is 10mm, what is the stress state in MPa? What is the elastic strain energy per unit volume in..
at a production facility 1.2 in thick 2 ft x 2 ft square brass plates denisty532.5 lbmft3 and cp 0.091 btulbmf that are
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