일반물리학 1 — Fluids: Problem 8

8 In Fig. 14-26, water flows steadily from the left pipe section (radius \(r_1 = 2.00R\)), through the middle section (radius \(R\)), and into the right section (radius \(r_3 = 3.00R\)). The speed of the water in the middle section is \(0.620 \text{ m/s}\). What is the net work done on \(0.700 \text{ m}^3\) of the water as it moves from the left section to the right section?