Last Name, First s1

CHE 311 (Fall 2002) ______LAST NAME, FIRST Problem set #2 I. 1.23, 1.24, 1.25, 2.3, 2.5, 2.6 (Text) Note: Read problem 1.25 for the parameters required for problem 1.23. For 1.23 choose D, , and  as the recurring parameters. For 1.24 choose D, U, and  as the recurring parameters

II. Water flows steadily through a 2-in.-inside diameter pipe at the rate of 120 gal/min. The 2- in. pipe branches into two 1-in.- inside diameter pipes. Water viscosity is 1.2210-5 ft2/s. (1 ft3 = 7.48 gal) 1) If the average velocity in one of the 1-in. pipes is 25 ft/s, the average velocity in the other 1-in. pipe is ______

2) The Reynolds number in the 2-in. pipe is ______

III. The U-tube shown in Fig. 1 has legs of unequal internal Fig. 1. U-tube with immiscible liquids diameters d1 = 12 mm and d2 = 8 mm, which are partly 3 filled with immiscible liquids of density 1 = 1,800 kg/m 3 and 2 = 1,000 kg/m , respectively, and are open to the h atmosphere at the top. h A C 1. If an additional 1.2 cm3 of the second liquid is h added to the right-hand leg, hA will change by an amount . B

 (cm) = ______

2. If the level hB falls by 0.6 cm, the level hC will rise by a distance . (cm) = ______3. If hC = 3 cm and hA = 2 cm, then the gage pressure at the bottom of the manometer is ______

4. If hC = 3 cm and hA = 2 cm, then hB = ______

IV. Water flows in a 8-cm-diameter pipe with an average velocity of 10 m/s. It turns a 90o angle and Pipe flows radially between two parallel disks. The distance between the disks is 0.4 cm,

The velocity at a radius of 50 cm is ______disk

V. Rain is falling vertically downward at 5.0 m/s onto a 5000-m2 parking lot in an open rectangular ditch with an average velocity of 1.5 m/s. Estimate the depth of flow in the 1.5-m-wide ditch if two thousand 3-mm-diameter drops of water are contained in each cubic meter of rain Depth = ______

Problem set #3: 2.7, 2.10, 2.12, 2.15, 2.17, 2.19, 2.27, 2.32. Due: 10/11/2002

Problem set #4: 2.35, 2.36, 3.2, 3.3, 3.5, 3.6, 3.7, 3.8. Due: 10/18/2002