Explain what is meant by the equivalent length and velocity head approaches to estimating the energy losses in pipe fittings. Determine a relationship between the equivalent length and velocity head...

Explain what is meant by the equivalent length and velocity head approaches to estimating the energy losses in pipe fittings. Determine a relationship between the equivalent length and velocity head methods in terms of Fanning friction factor, f. Explain why inaccuracies occur between the two methods.