In the pipe network shown in the figure, all pipes have the same cross-section and can be assumed to have the same friction factor. The pipes connecting points W,N, and S with point J have an equal length L. The pipe connecting points J and E has a length 10L. The pressures at the ends N, E, and S are equal. The flow rate in the pipe connecting W and Jis Q. Assume that the fluid flow is steady, incompressible, and the pressure losses at the pipe entrance and junction are negligible.
Consider the following statements:
I: The flow rate in pipe connecting J and E is Q / 21.
II: The pressure difference between J and N is equal to the pressure difference between J and E.
Which one of the following options is CORRECT?