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For the original 4340 steel-reinforced concrete post design of Problem 1.13 and the new IM9 carbon fiber-reinforced concrete post design of Problem 1.16, compare the tensile stress-to-tensile... Consider the titration of 25.0 mL of 0.050 0 M Sn 2+ with 0.100 M Fe 3+ in 1 M HCl to give Fe 2+ and Sn 4+ , using Pt and calomel electrodes. (a) Write a balanced titration reaction. (b) Write two... Find a recent engineering failure in the news and prepare a technical report of at least 250 words explaining how a mechanical engineer could have prevented the failure. Explain clearly how your... The top 500 mm of a site consists of a clayey sand with void ratio of 0.90 and water content of 20.0%. The specific gravity of the soil grains is 2.68. When the ground is compacted at the same water... A consolidated-drained triaxial test was carried out on a normally consolidated clay specimen, and the following results were recorded: ' 3 = 150 kN/m 2 and f = 260 kN/m 2 . An identical specimen... The crowbar is subjected to a vertical force of P = 25 lb at the grip, whereas it takes a force of F = 155 lb at the claw to pull the nail out. Find the moment of each force about point A and... Replace the distributed loading by an equivalent resultant force, and specify its location on the beam, measured from the pin at A. 4 kN/m 2 kN/m -3 m -3 m If rope BC will fail when the tension becomes 50 kN, determine the greatest vertical load F that can be applied to the beam at B. What is the magnitude of the reaction at A for this loading? Neglect... You need to borrow $12,000 to pay your tuition plus room and board. One bank offers to loan you the money for 10 years at 5.0 percent interest compounded annually. Another bank offers you the loan at... Determine the moment of inertia for the shaded area about the x axis. -y? = 1 - x 1 m 1 m 1 m - Go to the Internet and connect to the NSPE website (www.nspe.org/ethics). Read the complete NSPE Code of Ethics for Engineers and briefly discuss your reading. An engineer is interested in the effects of cutting speed (A), tool geometry (B), and cutting angle (C) on the life (in hours) of a machine tool. Two levels of each factor are chosen, and three... One pound-mass of water fills a container whose volume is 2ft 3 . The pressure in the container is 100 psia. Calculate the total internal energy and enthalpy in the container. Design an experiment for confounding a 26 factorial in four blocks. Suggest an appropriate confounding scheme, different from the one shown in Table 7-8. Table 7-8. Derive the Laplace transform for the following time functions: a. u(t) b. tu(t) c. sin t u(t) d. cos t u(t) Find the transfer function, G(s) = VL(s)/V(s), for each network shown in Figure P2.4. 2H 20 F 22 22 v(t) ( 20 + v(1) 2H3 2 H (a) (b) 1/2 ++ +1 A two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit as shown in Fig. P1160 uses refrigerant-134a as the working fluid. The system operates the evaporator at... Find the state-space representation of the network shown in Figure P3.3 if the output is v o (t). iz(1). 1 H 1F v,(1) 1 F 22 i(1) iz(1) FIGURE P3.3 Represent the electrical network shown in Figure P3.1 in state space, where v o (t) is the output. 12 32 12 v,(1) 2 H 1H 0.5 F FIGURE P3.1 a. Write, but do not solve, the mesh and nodal equations for the network of Figure P2.6. b. Use MATLAB, the Symbolic Math Toolbox, and the equations found in part a to solve for the transfer... In a paint mixing plant, two tanks supply fluids to a mixing cistern. The height, h, of the fluid in the cistern is dependent upon the difference between the input mass flow rate, q, and the output... Write the general form of the capacitor voltage for the electrical network shown in Figure P4.4. R = 10 k2 vit) = u(t) R2 = 10 k2 C = 10 F L= 200 H FIGURE P4.4 A rocket fi red vertically up from the north pole achieves a velocity of 27 000 km /h at an altitude of 350 km when its fuel is exhausted. Calculate the additional vertical height h reached by the... Just after launch from the earth, the space-shuttle orbiter is in the 37 137mi orbit shown. At the apogee point A, its speed is 17,290 mi/hr. If nothing were done to modify the orbit, what would be... Find the following for the system shown in Figure P5.17: a. The equivalent single block that represents the transfer function, T(s) = C(s)/R(s). b. The damping ratio, natural frequency, percent... Refer to the Harris Corporation/ University of Florida study to determine whether a manufacturing process performed at a remote location can be established locally, Exercise 2.72. Test devices... The uniform plate of mass m is released from rest while in the position shown. Determine the initial angular acceleration a of the plate and the magnitude of the force supported by the pin at O. The... Determine the maximum counterweight W for which the loaded 4000-lb coal car will not overturn about the rear wheels B. Neglect the mass of all pulleys and wheels. 12" 3 B 30 W The four-bar linkage of Prob. 5/86 is repeated here. If the angular velocity and angular acceleration of drive link OA are 10 rad/s and 5 rad/s 2 , respectively, both counterclockwise, determine the... The switching device of Prob. 5/76 is repeated here. If the vertical control rod has a downward velocity v = 2 ft/sec when the device is in the position shown, determine the corresponding speed of... Design a PD controller for the system shown in Figure P9.2 to reduce the settling time by a factor of 4 while continuing to operate the system with 20.5% overshoot. Compare the performance of the... The deflection on the manometer is h meters when the pressure in the tank is 150 kPa absolute. If the absolute pressure in the tank is doubled, what will the deflection on the manometer be?... The uniform cylinder is rolling without slip with a velocity v along the horizontal surface when it overtakes a ramp traveling with speed v 0 . Determine an expression for the speed v which the... Both pipes in the system shown have an equivalent sand roughness k s of 0.10 mm and a flow rate of 0.1 m 3 /s, with D 1 = 12 cm, L 1 = 60 m, D 2 = 24 cm, and L 2 = 120 m. Determine the difference in... Water flows from the reservoir through a pipe and then discharges from a nozzle as shown. The head loss in the pipe itself is given as h L = 0.025(L/D)(V 2 /2g), where L and D are the length and... What is the composition of the vapor phase in equilibrium with a liquid phase chloroform(1)/tetrahydrofuran(2) mixture of the following compositions at P = 1 bar? (a) x 1 = 0.1 (b) x 1 = 0.2 (c) x 1... What is the composition of the vapor phase in equilibrium with a liquid phase ethanol(1)/ethyl acetate(2) mixture of the following compositions at P = 1 bar? (a) x 1 = 0.1 (b) x 1 = 0.2 (c) x 1 = 0.3... Consider a closed vessel initially containing 1 mol of pure tetrahydrofuran at 74C and 120 kPa. Imagine that pure chloroform is slowly added at constant temperature and pressure until the vessel... Determine Z i , Z o , and A v for the network of Fig. 8.79. Fig. 8.79 +20 V Ipss=9 mA Vp= -4.5 V ra= 40 kQ 10 MQ A Z. 2.2 k2 FIG. 8.79 Why is it not a good idea to use solid solution strengthening as a mechanism to increase the strength of copper for electrical applications? Perfect pitch A recent study of perfect pitch tested 2700 students in American music conservatories. It found that 7% of non-Asian and 32% of Asian students have perfect pitch. A test of the... Consider the closed-loop system in Figure P5.22, where (a) If = 2.43, determine the value of K such that the steady-state error of the closed-loop system response to a unit step input, is zero. (b)... Determine the components of F that act along rod AC and perpendicular to it. Point B is located at the midpoint of the rod. 6 m 4 m D B F = 600 N 4 m 3 m 4 m The pipe is subjected to the force F, which has components acting F x = 1.5kN and F z = 1.25kN. If = 75, determine the magnitude of F and F y . X F A scale is constructed with a 4-ft-long cord and the 10-lb block D. The cord is fixed to a pin at A and passes over two small pulleys at B and C. Determine the weight of the suspended block at B if... Determine the x, y, z components of reaction acting on the ball-and-socket at A, the reaction at the roller B, and the tension in the cord CD required for equilibrium of the plate. X C 40 lb/ft -5... Calculate the tension in the cable at B required to support the load of 200 kg. The cable passes over a frictionless pulley located at C. Neglect the size of this pulley and weight of the boom. 60 B... The crane lifts the 400-kg load L. The primary boom AB has a mass of 1.20 Mg and a center of mass at G 1 , whereas the secondary boom BC has a mass of 0.6 Mg and a center of mass at G 2 . Determine... The crane has a mass of 800 kg and a center of mass at G. The bearing at A is a journal bearing and can support a horizontal force, whereas the bearing at B is a thrust bearing that supports both... Determine the force in members BC, CF, and FE and state if the members are in tension or compression. G 4 ft B 600 lb -4 ft- E 600 lb -4 ft 4 ft 800 lb Determine the force in members LK, KC, and CD of the Pratt truss and state if the members are in tension or compression. 3 m A L K B C D E 20 kN 30 kN 40 kN F -2 m--2 m--2 m--2 m--2 m--2 m- G Determine the force in each member of the truss and state if the members are in tension or compression. Set P 1 = 7 kN, P 2 = 7 kN. AQ P1 -2 m- D P B C 2 m The tank is used to store a liquid having a specific weight of = 80 lb/ft 3 . If it is filled to the top, determine the magnitude of the resultant force the liquid exerts on side ABEF. 1.5 ft F 2 ft... The three pin-connected members shown in the top view support a downward force of 60 lb at G. If only vertical forces are supported at the connections B,C,E and at the pad supports A, D, F, determine... Two 8kg blocks are attached to a cord that passes over two fixed drums. If 3 = 0.3 at the drums, determine the equilibrium angle the cord makes with the horizontal when a vertical force p = 200N is... Two blocks A and B, each having a mass of 6 kg, are connected by the linkage shown. If the coefficients of static friction at the contacting surfaces are B = 0.8 and A = 0.2, determine the largest... If the coefficient of static friction at contact points A and B is s = 0.3, determine the maximum force P that can be applied without causing the 100-kg spool to move. A 0.6 m B P 0.9 m Prob. F8-4 The smooth 180-lb pipe has a length of 20 ft and a negligible diameter. It is carried on a truck as shown. If the truck accelerates at a = 5 ft/s 2 , determine the normal reaction at A and the... At the instant = 30, the frame of the crane is rotating with an angular velocity of = 1.5 rad/s and angular acceleration of = 0.5 rad/s, while the boom AB rotates with an angular velocity of =... A rotating step shaft is loaded as shown, where the forces F A and FB are constant at 600 lbf and 300 lbf, respectively, and the torque T alternates from 0 to 1800 lbf in. The shaft is to be... For each following case, express the voltage ratio in decibels: (a) Vin (c) Vin = 1 V, Vout = 1V 10 V, Vout = 7.07 V (b) Vin 5 V, Vout = 3 V (d) Vin=25 V, Vout=5V A 3 m 3 insulated tank contains steam at 1 bar, 150 C. The tank is connected to a steam line that is maintained at 10 bar, 300 C until the pressure in the tank is 5 bar. How much steam (kg) was... Methane passes through a compressor and is subsequently cooled in a heat exchanger. Methane enters the compressor at 1 bar, 20 C with volumetric flow rate 30 ft 3 /min; it exits the heat exchanger at... The composite bar system in Figure 1.48 consists of a steel bar and a bronze bar that are both securely attached to a rigid block and rigid supports. The system is loaded with a total load P at the... By doing some simple calculations and plotting several graphs, one can verify some of the statements made in this chapter concerning phase equilibrium and phase transitions. All the calculations... Electrical power is to be produced from a steam turbine connected to a nuclear reactor. Steam is obtained from the reactor at 540 K and 36 bar, the turbine exit pressure is 1.0 bar, and the turbine... (a) A 3.96 10 4 M solution of compound A exhibited an absorbance of 0.624 at 238 nm in a 1.000-cm cuvet; a blank solution containing only solvent had an absorbance of 0.029 at the same wavelength.... Evaluate the following expressions in MATLAB for the given value of x. Check your answers by hand. a. y = 6x 3 + 4/x, x = 3 b. y = x/4 3, x = 7 c. y = (4x) 2 /25, x = 9 d. y = 2sinx/5, x = 4 e. y =... A steel cable of diameter 3/16 in. is attached to an eyebolt and tensioned to 500 lb (Figure P5.4, see on page 226). Calculate the stress in the cable, and express it in the dimensions psi, ksi, Pa,... A front loader of mass 4.5 Mg is shown in side view as it lifts a 0.75-Mg load of gravel (Figure P4.20). (a) Draw a free body diagram of the front loader. (b) Determine the contact forces between the... A 1-ft-long rod is made from the material of Problem P5.11. By what amount must the rod be stretched from its original length for it to begin yielding? Problem P5.11 Determine the elastic modulus and... Water flows through a circular pipe having a constriction in diameter from 1 in. to 0.5 in. The velocity of the water just upstream of the constriction is 4 ft/s. By using the result of Problem... The volume V and surface area A of a sphere of radius r are given by a. Develop a pseudocode description of a program to compute V and A for 0 r 3 m and to plot V versus A. b. Write and run the... A 3 m thick clay layer (c u = 60 kN/m 2 and = 19.0 kN/m 3 ) is underlain by a weaker clay (c u = 30 kN/m 2 and = 18.0 kN/m 3 ) to a large depth. A 2.0 m wide square foundation is placed at 1.5 m... A 2 m 2 m foundation carrying a 1000 kN column load is placed at 1.0 m below the ground level in a sand where = 19 kN/m 3 and (N 1 ) 60 = 25. Estimate the settlement using the Berardi and... A certain spherical street lamp emits light in all directions. It is mounted on a pole of height h (see Figure P23). The brightness B at point P on the sidewalk is directly proportional to sin + and... The equation for the voltage y across the capacitor of an RC circuit is where (t) is the applied voltage. Suppose that RC = 0.2 s and that the capacitor voltage is initially 2 V. If the applied... Determine the moment about point A of each of the three forces acting on the beam. F = 375 lb F = 500 lb . 0.5 ft 8 ft 6 ft 5ft- 5 ft- 30 F3 = 160 lb force F having a magnitude of acts along the diagonal of F = 100N the parallelepiped. Determine the moment of F about point A, using M A = r B F and M A = r C F. 200 mm 400 mm B 600 mm The plan of a group pile is shown in Figure P12.34. Assume that the piles are embedded in a saturated homogeneous clay having a c u = 90 kN/m 2 . Given: diameter of piles (D) = 316 mm,... Using Rankines earth pressures and neglecting the passive resistance, determine the factor of safety with respect to sliding and overturning for the gravity retaining wall shown in Figure P17.4. The... The dimensions of a jib crane, which is manufactured by the Basick Co., are given in the figure. The crane has a mass of 800 kg and a center of mass at G.The bearing at A is a journal bearing and can... The two blocks used in a measuring device have negligible weight.If the spring is compressed 5 in. when in the position shown, determine the smallest axial force P which the adjustment screw must... Select a mechanical component from Part 3 of this book (roller bearings, springs, etc.), go to the Internet, and, using a search engine, report on the information obtained on five manufacturers or... Go to the Internet and connect to the NSPE website (www.nspe.org/ethics). Read the history of the Code of Ethics and briefly discuss your reading. The shelf life of a carbonated beverage is of interest. Ten bottles are randomly selected and tested, and the following results are obtained: Days 108 138 124 163 124 159 106 134 115 139 (a) We would... Air is compressed by an adiabatic compressor from 100 kPa and 20C to 1.8 MPa and 400C. Air enters the compressor through a 0.15-m 2 opening with a velocity of 30 m/s. It exits through a 0.08-m 2... Saturated water vapor at 40C is to be condensed as it flows through a tube at a rate of 0.20 kg/s. The condensate leaves the tube as a saturated liquid at 40C. The rate of heat transfer from the tube... Several ovens in a metal working shop are used to heat metal specimens. All the ovens are supposed to operate at the same temperature, although it is suspected that this may not be true. Three ovens... In the central composite design of Problem 11-14, two responses were obtained, the mean and variance of an oxide thickness. Use the Box-Cox method to investigate the potential usefulness of... A round cold-drawn 1045 steel rod has a mean strength S y = 95.5 kpsi with a standard deviation of = 6.59 kpsi. The rod is to be subjected to a mean static axial load of P = 65 kip with a standard... Moist air is passed through a cooling section where it is cooled and dehumidified. How do (a) The specific humidity (b) The relative humidity of air change during this process? Steam enters a converging nozzle at 5.0 MPa and 400C with a negligible velocity, and it exits at 3.0 MPa. For a nozzle exit area of 75 cm 2 , determine the exit velocity, mass flow rate, and exit... Repeat Prob. 51 by first plotting the failure loci in the A , B plane to scale; then, for each stress state, plot the load line and by graphical measurement estimate the factors of safety. A... Name three applications for feedback control systems. An AISI 4142 steel Q&T at 800F exhibits S yt = 235 kpsi, S yc = 285 kpsi, and f = 0.07. For the given state of plane stress, (a) Determine the factor of safety, (b) Plot the failure locus and the... For the combined translational and rotational system shown in Figure P2.28, find the transfer function, G(s) = X(s)/T(s). J= 3 kg-m? B Radius = 2 m 1 N-m-s/rad TO) N = 10 A 3 kg-m2 N2 = 20 N4 = 60... Given the rotational system shown in Figure P2.26, find the transfer function, G(s) = 6 (s)/ 1 (s). J1, D N2 K1 Na Jz D N4 J6 Js 000 D K2 FIGURE P2.26 The pressure in a natural gas pipeline is measured by the manometer shown in Fig. P167E with one of the arms open to the atmosphere where the local atmospheric pressure is 14.2 psia. Determine the... The force generated by a spring is given by F = kx, where k is the spring constant and x is the deflection of the spring. The spring of Fig. P199 has a spring constant of 8 kN/cm. The pressures are P...
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