The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.

The equation relating friction factor to Reynold number, f-0.5 = 4 log

1.	The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.
A.	ikuradse
B.	on-Karman
C.	lausius
D.	olebrook
Answer» B. on-Karman

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The equation relating friction factor to Reynold number, f-0.5 = 4 loge (NRe/√f)-0.4, is called the __________ equation.

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