8. In Fig. 6, water flows steadily from the left pipe section (radius r, = 2.00R), through the middle section (radius R), and into the right section (radius r; = 3.00R). The speed of the water in the middle section is 0.500 m's. What is the net work done on 0.400 me of the water as it moves from the left section to the right section? F Fig. 6