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I just noted an error in Equation 24-3. When using the 44 in the equation, the units of velocity must be in mph. When using 64.4 instead of 44 in the equation, then the velocity units are ft/sec. Note that 64.4/44 = 1.466, the conversion factor from mph to ft/sec. 44/(mph) = 64.4/(ft/sec).
Sorry and you have a great Christmas Season and a wonderful New Year 2014.