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9 May 2012
- 15:5015:50, 9 May 2012 diff hist +13,146 N Darcy–Weisbach equation →Head loss form: changed 4f_D fo f_D." h_f = 4f \cdot \frac{L}{D} \cdot \frac{V^2}{2g}" is only valid if f is the fanning friction factor.