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In space ships, heat rejection to the surroundings is by radiation. A radiator in a space ship has an absorptivity α of 0.1 for 0 < λ < 2 μm, and 0.95 for λ > 2 μm. The surface is maintained at 600 K. What is the net heat flux from the surface when solar irradiation on the surface is 1200 W/m2? Assume a sky temperature of 0 K and that the surface is diffuse.
surface geostrophic velocity 0.5 ms density 1026kgm3 gravity 9.8ms ring radius 50km. you take velocity measurment
a house has a composite wall of plaster board lp 10mm k0.72 wm.k fibre glass insulation lb100mm k1.4 wm.k and plywood
calculate the quality of the system to begin with. calculate the amount of liquid water to begin with. calculate the heat transfer during the heating process.
during a plant visit it was noticed that a 12-m-long section of a 12-cm-diameter steam pipe is completely exposed to
a cast-iron cylinder of 300mm bore carries a pressure of 30 newtons per squaremillimetre what should be its thickness
consider an air-standard otto cycle and a modified cycle in which the isentropic compression and expansion processes
a linear motor is built utilizing neodymium permanent magnets supplying a magnetic field of .75t rails with an average
a hand drill is used to drill a holbein a very hard material. because the bit is very dull it spins with out advancing.
the cylinder-piston arrangement contains carbon dioxide at 300kpa and 200 degrees celsius and the volume 0.2m3. weight
a bicyclist leaves from her home at 9 a.m. and rides to a beach 40 mi away. because of a breeze off the ocean the
during this process heat is exchanged with surrounding such that the entire air remains at 30 degree celsius at all times.determine the heat transfer for this process.
the air with constant properties in a steady adiabatic flow enters a system at a pressure of 10 bars and 500 k with a
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