Pressure Difference in Pipe Flow

In a laboratory experiment, a student is studying the behavior of a fluid flowing through a pipe with varying diameters. The flow rate is constant, and the fluid is incompressible. At one section of the pipe, the diameter is 8 cm, and at a narrower section, the diameter is 4 cm. The student applies the principle of continuity and Bernoulli's equation to determine the pressure difference between the two sections. Given that the density of the fluid is 1000 kg/m³, what is the pressure difference between the wider section and the narrower section of the pipe?