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A 10-cm-diameter sphere maintained at 30?C is buried in the earth at a place where k =1.2W/m· ?C. The depth to the centerline is 24 cm, and the earth surface temperature is 0?C. Calculate the heat lost by the sphere. 3-12 A 20-cm-diameter sphere is totally enclosed by a large mass of glass wool. A heater inside the sphere maintains its outer surface temperature at 170?C while the temperature at the outer edge of the glass wool is 20?C. How much power must be supplied to the heater to maintain equilibrium conditions?
Determine the minimum dimensions of the crosssection and the radius of curvature at the point of maximum stress.
a cattle watering fountain has a free water surface with a size equal 0.6m x 0.3m with the longer side being parallel
Air at a pressure of 1 ATM, a temperature of 15° C, and a velocity of 10 m/s flows over a 3 m long flat plate that is heated to a uniform temperature of 140° C. What is the local heat transfer coefficient 3m from the leading edge of the plate?
Calculate the static thrust of the turbojet engine having mass flow 88lbm/sec the ratio of air and fuel mass flowing into the turbojet is 50:1 and it's exhaust plane the velocity is 1640 ft/sec and pressure is same as ambient pressure?
Determine the motor torque M which must be supplied to the pinion C. Neglect the weight of bar AB -
Determine the radiation per unit area in the bandwidth of 1 micrometer to 2.5 micrometer in W/m^2 from a balck body at 2500 K.
Calculate the shear force V and bending moment M
The second element of the task is to design a rising rate linkage mechanism that will permit at least 120 mm of rear wheel travel. The above figure can be used as a basis for your design.
A built-up cantilever beam having a bending stiffness of 200 N/m supports a mass of 2 kg at its free end. The mass is displaced initially by 30 mm and released.
The total hot water flow rate is 10 gal/min which is equally divided among 16 plates. The average temperature of hot water is 80C. Calculate the pressure drop.
design a packed tower for the absorption so2 from air. the so2 feed contain 0.0016 mol frac a into pure water in column
a computer consists of an array of five printed circuit boards pcbs each dissipating pb 20w of power. cooling of the
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