Oil enters a 100-mm-diameter pipe steadily with a velocity of 5 m/s. The gage pressure in the pipe at A and B is 80 kPa. The density of the oil is 900 kg/m3. Neglect gravitational effects. Determine the reaction force exerted on the elbow by the couplings at A and B. Please clearly define the coordinate system and the control volume.

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.

hope this ! this is not copied! search it up, it's free of plagiarism!

total distance/total time

(85 + 82)/(5+3)

167/8

20 just over