Water vapor at 8 mpa and 520°c enters a well-insulated turbine at steady state with a mass flowrate of 4 kg/s and exits at 1 bar and a quality of 95%. kinetic and potential energy effects are negligible. determine the (a) power developed by the turbine, in kw (b) rate of entropy production, in kwik (c) isentropic turbine efficiency

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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pythagoras' theorem

square root (-5^2+9^2)

square root (25+81)

square root (106)

angle is tan^-1(9/5)

neg x, pos y