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Consider the chip on the circuit board of Problem 6.39. To ensure reliable operation over extended periods, the chip temperature should not exceed 85°C. Assuming the availability of forced air at T∞ = 25 C and applicability of the prescribed heat transfer correlation, compute and plot the maximum allowable chip power dissipation Pc as a function of air velocity for 1 ≤ V ≤ 25 m/s. If the chip surface has an emissivity of 0.80 and the board is mounted in a large enclosure whose walls are at 25°C, what is the effect of radiation on the Pc - V plot?
a gas stream produced as a by-product of a petroleum processing operation is to be used as a fuel in a small electric
a spaceship of mass 2.00times106kg is cruising at a speed of 5.60times106ms when the antimatter reactor fails blowing
consider the following state of stress mpa sigmasigmax 82 sigmasigmay 16 sigmasigmaz 40 tautaoxy 15 tautaoyz
Wind turbines are becoming more and more common as a method of energy production, wind turbines by their very nature are dynamic and are subject to and create their own internal and external kinematics and kinetics.
Air enters a gas turbine with a velocity of 165m/s and a specific enthalphy of 2800KJ/kg and leaves with a velocity of 135m/s and specific enthalpy of 2175KJ/kg. The heat lost to the surrounding turbine is 32.5KJ/kg. Determine power developed by the ..
Assume the prototype fluid to be seawater at 60 °F. Could any of the liquids with viscosities given in Fig. B.2 in Appendix B be used as the model fluid?
Describe the failure pattern of a ductile material in shear, and predict the failure pattern of a ductile mater material under torsion.
the inner and outer surface temperatures of a glass window 5 mm thick are 15degc and 5degc. what is the heat loss
wind turbines are becoming more and more common as a method of energy production wind turbines by their very nature are
A cylindrical oil-storage tank, whose diameter is 120 ft, is 60 ft deep when it is fully filled with an oil of density 55lbm/ft³. Its top is open to the atmosphere. What is the gauge pressure (psig) at the bottom of this tank?
a short cylindrical block of 6061-t6 aluminum having an original diameter of 25 mm and a length of 125mm is placed in a
If plasma etching is used instead of wet etching, and the degree of anisotropy for plasma etching is infinity, what should be the size of the mask opening?
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