Tunnel b at the arnold engineering development center (aedc) in tennessee is often used for determining the flow field and/or the heating rate distributions. the mach number in the test section is 8. if the stagnation temperature is 700 k and the stagnation pressure can be varied from 5.90 * 106 to 4.90 * 106 what is the range of reynolds number that can be obtained in this facility? assume that the characteristic dimension is 0.75 m, which could be the length of a hypersonic waverider model.

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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