Problem 1: a small disk 5 mm in diameter is positioned and the center of an isothermal hemispherical enclosure aperture the disk is at 900 k, and has a diffuse gray surface with an emissivity of 0.7. the hemispherical adiabatic enclosure has a radius of r 100 mm and an emissivity 450 of 0.85. the enclosure has a small aperture of 2mm diameter. by radiative network analysis, determine the radiant power leaving the enclosure through the aperture outside the aperture the environment is at 300 k. (let the disk be surface 1, the hemispherical enclosure is surface 2, and the aperture be surface 3)

explanation: magnetic pole, region at each end of a magnet where the external magnetic field is strongest. the south-seeking pole, or any pole similar to it, is called a south magnetic pole. unlike poles of different magnets attract each other; like poles repel each other.

as we know our atmosphere or air have different levels. every level has other gasses, and every gas has another permeability. when the light comes from lower permeability to higher permeability, it changes its direction. so that means that when the light comes from the moon to the earth, it changes it's direction many more times. it basically means that the shape of the light part of the moon is changed on the earth.

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