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Free convection occurs between concentric spheres. The inner sphere is of diameter Di = 50 mm and tem- perature Ti = 50°C, while the outer sphere is main- tained at To = 20°C. Air is in the gap between the spheres. What outer sphere diameter is required so that the convection heat transfer from the inner sphere is the same as if it were placed in a large, quiescent environ- ment with air at Too = 20°C?
An adiabatic constant-volume combustion chamber is filled with a mixture of air and methane; lambda (AFR/AFRs) = 1.3. The initial temperature of the mixture is 25°C, and its pressure is 1 bar.
the initial velocity v0 of a hockey puck is 105 mih. determine a the largest value less than 45deg of the angle a for
The assembly shop of a manufacturer of large air conditioners for commercial and industrial buildings has numerous units at various stages of completion, most sitting unattended for lack of parts. As parts and subassemblies arrive from other departme..
Metals A and B of melting points 700 and 920oC, respectively, are mutually soluble in the liquid state but only partially soluble in the solid state. At 4000C the solubility of B in A is 14 wt%, and the solubility of A in B is 9 wt%; at room temperat..
the conveyor carries cartons down five meters to the first floor delivery room on rollers. the radius of the conveyor
steam at 95 bar and 400 c is supplied in turbine. the condenser pressure is 0.035 bar. if the plant operates as a
a-2-m by 1.5-m section of wall of an industrial furnace burning natural gas is not insulated and the temperature at the
the steel bolt and anchor assembly is used to reinforce the roof of a passageway in an underground coal mine. in
You have been asked to prepare and deliver a presentation to a non-technical manager to justify the hiring of a system architect for a new project. Write a list of bullet points setting out the key points in your presentation. Naturally, you have ..
one half cell of an electrochemical cell consists of a pure iron electrode in a solution of fe2 the other is a tin
how do you find the magnitude of individual vectors when you have the magnitude of the resultant vector. after finding
It takes 15 revolutions of the screws for the full range motion necessary to unload/load a work piece. The DC motor constant, KM, is 0.6 rev/V/s and there is a 20 Volt power supply. Assuming a constant proportional control gain, KP of 4 volts/rev, ho..
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