Question

A quantity describing this phenomenon is estimated iteratively via the reciprocal of its square root with the Colebrook–White equation. A quantity describing this phenomenon appears on the vertical axis of a log–log plot that features a steep line to the left of many nearly parallel decreasing curves to show when that “factor” of this phenomenon equals 64 over the Reynolds number. (20[3])This phenomenon (20[1])drives head loss, which is calculated in the (*) Darcy–Weisbach (10[2])equation. (10[2])A (10[1])form of drag named for this phenomenon (10[3])is driven by turbulence against objects’ (10[1])“skin.” A pipe’s roughness contributes (10[1])to this phenomenon, (10[1])causing energy loss (10[1])during fluid flow. For 10 points, name this (10[1])force (10[1])that is reduced (10[2])by lubricants. (10[1])■END■ (10[15])

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