The pressure drop needed to force water through a horizontal 1-in.-diameter pipe is 0.60 psi for every 12-ft length of pipe. determine the shear stress on the pipe wall. determine the shear stress at distances 0.3 and 0.5 in. away from the pipe wall. repeat the problem if the pipe is on a 20 degree hill. is the flow up or down the hill? explain.

c because the news are a source of information of things that happen on the daily and shows evidence about that particular topic

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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