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) ?

3

4

Ε = Ε0 + Α.T

2

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) ?

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