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A certain superinsulation material having a thermal conductivity of 2 x 10^-4 W/m.C is used to isulate a tank of liquid nitrogen that is maintained at -196 degrees celcius; 199 kj is required to vaporize each kilogram mass of nitrogen at this temperature. Assuming that the tank is sphere having an inner diameter(ID) of 0.56 m, estimate the amount of nitrogen vaporized per day for an insulation thickness of 2.5 cm and an ambient temperature of 25 degrees celcius. Assume that the outer temperature of the insulation is 25 degrees celcius.
a stone of 20 kg of mass is held 15 m above a tank containing 200 kg of water. the stone water and the air are at the
a loudspeaker is modeled with the following three equations.mx bx blittecoil blxldidt ri va - blxfind a transfer
air with mass flow rate of 0.4 kgs enters an insulated compressor operating at steady state.determine the power
a roughing section of a broach is to remove stock 3.2 mm deep from a steel surface205 mm long x 50 mm wide each tooth
determine the heat transferred and the work done both in kjkg when saturated water vapor in a closed system is
a keg of beer loumlwenbraumlu sg 1.11 has a small pinhole leak in it. the beer sprays vertically into the air to a
What are the forces on the pinion,gear,and shafts?
Evaluate the reduction in pump BHP required by heating the oil from 50° F to 100° F. Suppose efficiency of 80% (HP)
A spherical balloon inflated sos that the volume is increasing at the rate of cubic meter/min. At what rate is the diameter increasing when the diameter is 12 m?
What information has to be obtained in order to ensure that the method will be a satisfactory one and determine changes in composition of a fluid. Define what is meant by refractive index, and give the relationship between the incident and refracte..
an accelerometer was used to measure the vibrations of machinery. the sensor output was acquired during an experiment
Determine if the shaft has infinite fatigue life. If not, determine the number of cycles to failure. Also determine the safety factor for first cycle yield and draw a free body diagram, shear and moment diagrams, and graph the loads on the shaft..
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