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1. A cylinder of 120-mm diameter at 1000 K is quenched in saturated water at 1 atm. Describe the quenching process and estimate the maximum heat removal rate per unit length during the process.
2. A 1-mm-diameter horizontal platinum wire of emis- sivity s = 0.25 is operated in saturated water at 1-atm pressure.
(a) What is the surface heat flux if the surface temper- ature is Ts = 800 K?
(b) For emissivities of 0.1, 0.25, and 0.95, generate a log-log plot of the heat flux as a function of sur- face excess temperature, !l.Te = Ts - Tsat, for 150 Te 550 K. Show the critical heat flux and the Leidenfrost point on your plot. Separately, plot the percentage contribution of radiation to the total heat flux for 150 !l.Te 550 K.
The thrust, T, of a marine propeller is assumed to depend only on its diameter, D, the fluid density, the viscosity, the revolutions per unit time, and its forward velocity, V. Express this dependence in non-dimensional terms. Is one of the ?–product..
Compute the demands for goods 1, 2, and 3. Suppose there is a black market for good 1. For what black market prices q would the consumer buy no more than the one unit of good 1 received at price of 1 under rationing?
Air flows into a heat engine at ambient conditions 100 kPa, 300 K, Energy is supplied as 1200 kJ per kg air from a 1500 K source and in some part of the process a heat transfer loss of 300 kJ/kg airs happens at 750 K. The air leaves the engine at ..
Consider an ideal Brayton cycle executed between the pressure limits of 1100kpa and 100kpa and temperature limits of 20 degrees Celsius and 1200 degrees Celsius with argon as the working fluid. Please find (1) the net work output of the cycle, (2) th..
air at 68 degrees f and 1atm. flows over a flat plate at 114.8 fts. the plate is 29.5 in long and 12 in wide. the plate
A stream of gas flowing at 15,000 scfm contains 20 ppm of toluene. Assuming the process operates 8500 hours per year, calculate the potential emissions of toluene, tons/year. What kind of a system should be considered to control this stream, and why?
a turbojet aircraft is flying with a velocity of 320 ms at an altitude of 9150 m where the ambient conditions are 32
air is considered as an ideal gas. dont use gas table for gas properties just assume that both cv and cp are constants.
a cold air-standard otto cycle operates between temperature limits of 70 and 1500 f. calculate the thermal efficiency
the torsional assembly shown in figure consists of a solid bronze gb 45 gpashaftcd and hollow aluminium alloyga28 gpa
a u-tube manometer is connected to a gas pipe. the level of the liquid in the manometer arm open to the atmosphere is
1 for a separations process it is necessary to determine the vle compositions of a mixture of ethyl bromide and
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