Problem 5. Fluid (r = 56 lbm/ft®) enters a pipe bend of constant 5 in. diameter with velocity of 20 ft/s i. If the pressure P1 = 60 psia and P2 = 50 psia, use the coordinate system shown to find the force required to hold the bend in place. Angle 0 is equal to t/3. %3D V2 P2 P1

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Units and Dimensions

Dimensions are the basic concepts of the measurement of quantities. Units are the means of expressing the dimensions. For instance, an area has a dimension of L2 and a unit of m2.