is inversely proportional to L, the length of the tube (so you double the tube length, the flow rate halves). The flow rate also depends on the following three other quantities: the pressure difference AP between the ends of the pipe, the radius of the pipe R, and the viscosity of the fluid n. The pressure difference is a force per area (and force has units of kg · m/s²). The viscosity has units of kg /(m ·s).
Fig: 1