Physics · Fluid Mechanics

In a pipe network, all pipes have the same cross-section and 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 J is Q. Assuming 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 the 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 of the options is CORRECT?