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A vertical array of circuit boards is immersed in quiescent ambient air at T∞ = 17°C. Although the components protrude from their substrates, it is reasonable, as a first approximation, to assume fla plates with uniform surface heat flux q"s. Consider boards of length and width L = W = 0.4 m and spacing S = 25 mm. If the maximum allowable board temperature is 77°C, what is the maximum allowable power dissipation per board?
Coal gasification is carried out at 850 °C and 40 atmospheres pressure, by reaction of coal with steam and oxygen. The empirical formula of the coal is roughly CH0.8S0.013. What materials of construction would you recommend for:
Demonstrate the principle of the Solovay and Strassen primality test on the number m = 33 The number m has been made small in this problem to keep the calculations simple. So, do not make use of numbers that "incidentally" have a factor in common ..
Develop the four equations and describe the meaning of each term.
A freshly prepared sample of a certain radioactive isotope has an activity of 10 mCi. After 4 h, the activity is 8 mCi.
Determine the synchronous speed in revolutions per minute and the useful torque in new ton meters of a 200-hp, 60-Hz, six-pole synchronous motor operating at its rated full load (1 hp ≅ 746 W).
Compute the power factor for zero voltage regulation on full load.
Make a practice HAZOP study of the plant section and add any instrumentation that is needed to develop the full P and I diagram.
Why fluids are important in chemical engineering - enormous number of materials normally exist as gases or liquids, or can be transformed into such phase and explain systematic description of change in fluid systems, mechanical change
What is the mass of the volume of combined fuel product? What is the total volume of combined fuel allowed on the truck? What is the volume of E100 allowed on the truck? What is the volume of E85 allowed on the truck?
At a pressure of 10 bar, determine the bubble and dew point of a mixture of hydrocarbons, composition, mol%: n-butane 21, n-pentane 48, n-hexane 31. The equilibrium K factors can be estimated using the De Priester charts in Dadyburjor (1978) or fo..
Calculate the amount and composition of vapor and liquid when a solution with z1 = 0.45 is flashed to 40 °C, 0.065 bar.
Develop a set of performance specifications for an electromechanical device to raise and lower the lower leg of a wheelchair user (to prevent edema).
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