Archives: Solution Manual

Problem 9.106 Air, from a 3 cubic meter tank initially at 300 kPa and 200C, blows down adiabatically through a smooth pipe 1 cm in diameter and 2.5 m long. Estimate the time required to reduce the tank pressure to […]

EXERCISE DESCRIPTION To complete this exercise prepare the base for the unit paver project identified in Lab Manual Figure 28–5. The base area will support an 8 foot × 8 foot square patio with a 2 percent (1/4 inch per […]

Air flows through a duct as in Fig. P9.84, where A1 = 24 cm2, A2 = 18 cm2, and A3 = 32 cm2. A normal shock stands at section 2. Compute (a) the mass flow, (b) the Mach number, and […]

Exercise 27 Stairs 111 CAUTION 111 Exercise 27 Stairs OBJECTIVE The objective of this exercise is to properly install butt and interlocking stairs as part of a landscape retaining wall project. being erected, with the first course of the stairs […]

Problem 9.60 When a pitot tube such as Fig. (6.30) is placed in a supersonic flow, a normal shock will stand in front of the probe. Suppose the probe reads po = 190 kPa and p = 150 kPa. If […]

EXERCISE DESCRIPTION To complete this exercise construct two short wall segments, each 8 feet long and three courses high, one with a 4 foot wide set of interlocked stairs in the center of the wall and the second with a […]

Solution 9.37 For a CV around the tank, write the mass and the energy equations: With To(t) known, we could go back and solve the mass relation for po(t), but in fact that is not necessary. We simply use the […]

Exercise 26 Wall Anchoring 107 CAUTION equipment. Use caution when cutting and installing wall materials. Obtain assistance when lifting wall materials. segmental units and buried in the fill material behind a wall. It too provides resistance to forces pushing forward […]

ocean). (c) Compute the speed of sound at 20C and 9000 atm and compare with the measured value of 2650 m/s (A. H. Smith and A. W. Lawson, J. Chem. Phys., vol. 22, 1954, p. 351). Solution 9.12 We may […]

EXERCISE DESCRIPTION To complete this exercise install the anchoring method appropriate for each segment of wall. EXERCISE SETUP Review safety concerns with students before beginning this exercise. The activities of this exercise can be inte- grated into another exercise. To […]

Problem 9.C1 The converging–diverging nozzle sketched in Fig. C9.1 is designed to have a Mach number of 2.00 at the exit plane (assuming the flow remains nearly isentropic). The flow travels from tank a to tank b, where tank a […]

105 105 Retaining Wall Drainage OBJECTIVE The objective of this exercise is to properly install tile drainage behind retaining walls. TEXTBOOK REFERENCE Information related to this activity can be found in the Landscape Construction textbook in Chapter 16, Materi- als […]

Solution 8.104 For this two-dimensional polar-coordinate system, a differential mass is: Problem 8.105 A 22-cm-diameter solid aluminum sphere (SG = 2.7) is accelerating at 12 m/s2 in water at 20C. (a) According to potential theory, what is the hydrodynamic mass […]

EXERCISE DESCRIPTION To complete this exercise install wall drainage behind the segment of wall constructed for Exercise 22, 23, or 24 or for a project. EXERCISE SETUP Review safety concerns with students before beginning this exercise. This exercise should be […]

C12 Chapter 12 Spreadsheet Problem Solutions (C12) 1. There are a number of instructions with which you should be familiar to use these computerized models. These instructions appear in a 2. A graph that shows the expected EPS and standard […]

Solution 8.90 Each configuration has a different advantage: (a) highly maneuverable but unstable, needs Problem 8.91 If  (r,  ) in axisymmetric flow is defined by Eq. (8.72) and the coordinates are given in Fig. 8.28, determine what partial […]

CAUTION equipment. Use caution when cutting and installing wall materials. Obtain assistance when lifting wall materials. TEXTBOOK REFERENCE Information related to this activity can be found in the Landscape Construction textbook in Chapter 18, Segmen- tal Precast Unit Retaining Walls. […]

Problem 8.66* The inviscid velocity along the wedge in Prob. 8.65 has the analytic form U(x) = Cxm, where m = n − 1 and n is the exponent in Eq. (8.53). Show that, for any C and n, computation […]

EXERCISE DESCRIPTION To complete this exercise construct the segment of land- scape retaining wall shown in Lab Manual Figure 24–2. The wall should be constructed three courses high. This wall should include inside and outside radius sections with short straight […]

Problem 8.44 Suppose that circulation is added to the cylinder flow of Prob. 8.43 sufficient to place the stagnation points at  = 35° and 145°. What is the required vortex strength K in m2/s? Compute the resulting pressure and […]

CAUTION Follow manufacturer’s instructions when using equipment. Use caution when cutting and installing wall materials. Obtain assistance when lifting wall materials. whole blocks. • Trim half of the corner angle from each corner block (e.g., for a 90° corner, trim […]

Chapter 11 CFIN6 Chapter 11 Solutions 11-1 a. Equation solution (set up):  −  + =+   +    10 10 1 11 (1 YTM) $1,077 $60 $1,000 YTM (1 YTM) PMT = 60 FV = […]

Problem 8.17 Find the position (x, y) on the upper surface of the half-body in Fig. 8.9a for which the local velocity equals the uniform stream velocity. What should the pressure be at this point? This is only half a […]

EXERCISE DESCRIPTION To complete this exercise construct the segment of land- scape retaining wall shown in Lab Manual Figure 23–3. The retaining wall should be constructed three courses high. This wall should include inside and outside angled corners with short […]

Problem 8.C1 Did you know that you can solve simple fluid mechanics problems with Microsoft Excel? The successive relaxation technique for solving the Laplace equation for potential flow problems is easily set up on a spreadsheet, since the stream function […]

CAUTION or stone, and to properly step the first course of the wall as the base grade changes. Locate utilities before beginning construction. Follow manufacturer’s instructions when using equipment. wall base requires that the area under the wall be exca- […]

Problem 7.C1 Jane wants to estimate the drag coefficient of herself on her bicycle. She measures the projected frontal area to be 0.40 m2 and the rolling resistance to be 0.80 N · s/m. The mass of the bike is […]

EXERCISE DESCRIPTION —PART A To complete this exercise prepare a 20 foot long base for a landscape retaining wall (Lab Manual Figure 22–5). This base can be on a level surface that cuts across the run of a slope or […]

Solution 7.106 Since the only unknown is the kite area, this problem is simpler than Prob. P7.85. Convert Problem 7.107 The largest flag in Rhode Island stands outside Herb Chambers’ auto dealership, on the edge of Route I-95 in Providence. […]

88 Exercise 21 Wall Material Calculations OBJECTIVE The objective of this exercise is to correctly calculate wall material quantities. TEXTBOOK REFERENCE Information related to this activity can be found in the Landscape Construction textbook in Chapter 4, Construc- tion Math, […]

Problem 7.89 The AMTRAK Acela train passes through Kingston, RI at 130 mi/h, scaring all the villagers daily. Its total weight is 624 short tons, with a rolling resistance Crr ≈ 0.0024. Estimate the horsepower required to drive the train […]

EXERCISE DESCRIPTION —PART A Using the elevation show in Lab Manual Figure 21–2, calculate the quantities of wall materials required if the wall were constructed of: • Timbers (assuming timbers 8 feet long and 6 inches in height) • Segmental […]

Solution 7.62 For sea-level air, take  = 1.225 kg/m3 and  = 1.78E−5 kg/ms. Convert Problem 7.63 For those who think electric cars are sissy, Keio University in Japan has tested a 22-ft long prototype whose eight electric motors […]

77 CAUTION CAUTION • Connection to the water supply. Connecting to a water source will require plumbing from the water source to a point where a backflow prevention device is installed. An emergency shutoff and drain should also be installed […]

Solution 7.13 The Navier-Stokes equations for cylindrical coordinates are given in Appendix D, with “x” in the Fig. P7.13 denoting the axial coordinate “z.” Assume “axisymmetric” flow, that is, v  = 0 and  /  = 0 everywhere. […]

EXERCISE DESCRIPTION—PART A To complete this exercise, install the basic spray irriga- tion system shown in Lab Manual Figure 20–5. To pro- vide water, connect the system to a water supply using a garden hose. Place the controller on a […]

Atmospheric boundary layers are very thick but follow formulas very similar to those of flat- plate theory. Consider wind blowing at 10 m/s at a height of 80 m above a smooth beach. Estimate the wind shear stress, in Pa, […]

CAUTION Use caution when working with electricity. Verify that electrical circuits have been turned off before working on a lighting system. Exterior lighting systems should be connected only to GFCI circuits. Follow the manufacturer’s instructions for all lighting installations. light, […]

Chapter 10 Spreadsheet Problem Solutions (C10) 1. There are a number of instructions with which you should be familiar to use these computerized models. These instructions appear in a 2. The model is set up to deal with a situation […]

Solution 6.113 For water at 20C, take  = 998 kg/m3 and  = 0.001 kg/ms. For galvanized iron,  = 0.15 mm. Assume turbulent flow, with p the same for each leg: Problem 6.114* A blower supplies standard air […]

EXERCISE DESCRIPTION To complete this exercise install and test a DC exterior lighting system (Lab Manual Figure 19–7). The system should include a controller with two taps, timer, and pho- tocell, spot-lighting, and area lighting. criteria: • Circuits were turned […]

Solution 6.96 For air at 20C and 1 atm, take  = 1.20 kg/m3 and  = 1.8E-5 kg/m-s. The hydraulic diameter Problem 6.97 A heat exchanger consists of multiple parallel–plate passages, as shown in Fig. P6.97. The available pressure […]

68 CAUTION Locate all utilities before beginning construction. will be determined by the trench’s design, which will itself be based on the soil type and the amount of impermeable surface to be drained. General guidelines for a trench in well-drained […]

Chapter 9 CFIN6 Chapter 9 Solutions 9-1  Calculator solution: N = 6, I/Y = 10, PMT = 36,950, FV = 0; PV = ? = -160,926.88 6 1 1(1.10) Value PV of CFs 36,950 36,950(4.355261) 160,926.88 0.10  − […]

Problem 6.53 Water at 20C flows by gravity through a smooth pipe from one reservoir to a lower one. The elevation difference is 60 m. The pipe is 360 m long, with a diameter of 12 cm. Calculate the expected […]

EXERCISE DESCRIPTION To complete this exercise, install a 10-foot-long section of soaker trench that is 2 feet wide by 3 feet deep in an open, level area. The tile can be left extended out of the trench at the end […]

Problem 6.74 Two reservoirs, which differ in surface elevation by 40 m, are connected by a new commercial steel pipe of diameter 8 cm. If the desired weight flow rate is 200 N/s of water at 20C, what is the […]

CAUTION Exercise 17 Bioswale Construction OBJECTIVE The objective of this exercise is to properly construct a bioswale. Locate all utilities before beginning construction. TEXTBOOK REFERENCE Information related to this activity can be found in the Landscape Construction textbook in Chapter […]

2 11,000 15,000 3 20,000 15,000 4 30,000 15,000 5 45,000 15,000 c. If the required rate of return for each project is 13 percent, which project should West Coast select? If the required rate of return is 9 percent, […]

Problem 6.31 A laminar flow element or LFE (Meriam Instrument Co.) measures low gas-flow rates with a bundle of capillary tubes packed inside a large outer tube. Consider oxygen at 20C and 1 atm flowing at 84 ft3/min in a […]