The equation relating friction factor to Reynold number, f = 4 log (N/), is called the __________ equation.

The equation relating friction factor to Reynold number, f = 4 log (N/

1.	The equation relating friction factor to Reynold number, f = 4 log (N/), is called the __________ equation.
A.	Nikuradse
B.	Von-Karman
C.	Blausius
D.	Colebrook
Answer» B. Von-Karman

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The equation relating friction factor to Reynold number, f = 4 log (N/), is called the __________ equation.

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