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A desktop computer is to be cooled by a fan. The electronic components of the computer consume 60 W of power under full-load conditions. The computer is to operate in environments at temperatures up to 45 °C and at elevations up to 3400 m where the average atmospheric pressure is 66.63 kPa. The exit temperature of air is not to exceed 60 °C to meet the reliability requirements. Also, the average velocity of air is not to exceed 110 m/min at the exit of the computer case where the fan is installed to keep the noise level down. Determine the flow rate of the fan that needs to be installed and the diameter of the casing of the fan. Assume that there is an increase in internal energy of 10,779 kj/kg.
Refrigerant 134a enters a heat exchanger in a steady state refrigeration system as saturated vapor at 0 °F and exits at 20 °F with no change in pressure.
the position of a crate sliding down a ramp is given by x 0.25t3 y1.5t2 z6-0.75t2.5 all in units of m where t is in
a link AC has uniform rectangular cross section 3mm thick and 25mm wide. Determine the normal stress in the central portion of that link? solution
Two kilograms of air within a piston-cylinder assembly execute a carnot power cycle with maximum and minimum temperatures of 750k and 300k, respectively.
an airplane a takes off as shown with a constant speed equal to v110kmh. the path of the airplane is described in the
tarzan king of the jungle mass 66.2 kg grabs a vine of length 14.6 m hanging from a tree branch. the angle of the vine
minimum weight design of a variable shape three-bar truss.numerical solution using the matlab optimization toolbox
SEM212 - Aim of this demonstration is to use measurements of the load required to propagate a crack (tear) in packaging tape to determine its fracture toughness.
derive the scaling relation for the strain energy release rate of crack extension under fixed displacement. clearly
Important information about Pressure Cooker, Steam is leaving a pressure cooker whose operating pressure is 30 psi. It is observed that the amount of liquid in the cooker has decreased by 0.4 gal in 45 minutes after the steady operating conditions..
assignment 1 product and engineering design reviewmust contain a brief description of the product then delve into
a apply the newton-raphson method to the function fx tanhx2-9 to evaluate its known real root at x3. use an initial
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