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A light breeze at 10mi/h blows across a metal building in the summer. The height of the building wall is 12t, and the width is 20ft. A net energy flux of 110 Btu/h*ft^2 from the sun is absorbed in the wall and subsequently dissipated of the surrounding air by convection. Assuming that the air is 80°F and 1 atm and blows across the wall as on a flat plate, estimate the average temperature the wall will attain for equilibrium conditions.
Calculate the concentration of vacancies in Pb at its melting temperature of 327oC. Assume an energy for vacancy formation of 0.55 eV/atom. Lead has an atomic weight of 207.2 g/mol and a density of 11.35 g/cm3.
Your engineering firm decides to build a prototype, and needs screw and nut fasteners as well as resistors and LEDs. There are machinists and electronics technicians available for in-house production. What is the most cost-effective way of acquiri..
Solve this problem with a linear programming model. Describe the optimum mix of raw materials and production levels for the products. How much profit does the business make?
Entropy explained in this solution, Liquid H2O at 8 MPa and 40 degrees C is heated reversibly at constant pressure until the temperature reaches 600 degrees C
the traveling crane consists of a 5-m-long beam having a uniform mass per unit length of 20kg/m. The chain hoist and its supported load exert a force of 8 kN on the beam when x=2m. draw the shear and moment diagrams for the beam.
Komodo dragons are the largest lizards known to man. A 250-pound dragon can eat enough food to increase it body weight by 1/2. Which number sentence could be used to find w, the weight of a k0modo dragon after increasing it body weight by 1/2?
Cooling and Heating Load Estimate using CAMEL program library and the data from DA-9
find the total heat loss per m length of the steam line. Find also the temperature at the interface of steam and insulation.
A slotted disk and opto-interrupter outputs pulses at 62 HZ. The disk has only one slot cut in it. what is the rotating speed of the disk in rpm?
Determine the magnitude of tensile force and corresponding normal stress of a wire A 28-ft length of 0.25-in
engine B is supercharged with after cooling and has cylinder inlet condition of 80c and 130 k pa to avoid knock problem it is desirable to have the air-fuel temperature at the start of combustion in engine B to be the same as in engine A calculate..
Plot the lift and drag forces exerted on an airfoil as a function of velocity. Use velocity values going from 0 to 45 m/s on a log-linear plot (log-scale on the y axis).
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