Which of the following equations as suggested by Colebrook and White gives the increase in roughness of a new surface (ε0) with age/time (t) (where, ε = roughness of the surface after time’t’. α = a co-efficient to be experimentally determined) ?
(A) ε = ε0 + α.t
(B) ε = ε0 + α.t2
(C) ε = ε0 + α.t3
(D) ε = ε0 + α.t4
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