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1. |
Which of the following is the 'Blaussius equation', relating friction factor to the Reynolds number ? |
A. | f = 0.079.NRe-0.25 |
B. | f-0.5 = 4.07 loge (NRef)-0.6 |
C. | |
Answer» B. f-0.5 = 4.07 loge (NRef)-0.6 | |