A parallel chord Howe truss is loaded as shown. Determine the force in members GI, GJ, and HJ.
An innovative engineer has invented a device to replace the hydraulic jacks found at many service stations. A movable piston with a diameter of 0.15 m is fitted into a cylinder. Cars are raised by...
The man has weight W and stands at the center of the plank. If the planes at A and B are smooth, determine the tension in the cord in terms of W and . B
Consider the liquid-level PI control system shown in Figure with the following parameter values: A = 3 ft2, R = 1.0 min/ft2, Kv = 0.2 cfm/psi, Km = 4 mA/ft, Kc 4, and 1 = 3 min. Suppose that the...
A Brayton cycle with regeneration using air as the working fluid has a pressure ratio of 7. The minimum and maximum temperatures in the cycle are 310 and 1150 K. Assuming an isentropic efficiency of...
An overhead 25-m-Iong, un-insulated industrial steam pipe of 100 mm diameter is routed through a building whose walls and air are at 25C. Pressurized steam maintains a pipe surface temperature of...
The elliptical ring shown was cut from a thin, uniform plate. Denoting the mass of the ring by m, determine its moment of inertia with respect to (a) The centroidal axis BB, (b) The centroidal axis...
Flow reactor with exponentially temperature-dependent source, formulate the function F() of Eq. 10.5-1 for a zero-order reaction with the temperature dependence Sc = ke -E/RT in which K and E are...
At a given point on the surface of the wing of the airplane in Prob. 3.6, the flow velocity is 130 m/s. Calculate the pressure coefficient at this point.
For the process modeled by Find the four transfer functions relating the outputs (y1, y2) to the inputs (u1, u2). The u and y arc deviation variables. yi -2yi -3y2 + 2u; dt dy = 4y;- 6y2 + 2u; + 4uz...
For the liquid storage system shown in Fig the control objective is to regulate liquid level h2 despite disturbances in flow rates, q1 and q4. Flow rate q2 can be manipulated. The two hand valves...
The frame is used to support the 100-kg cylinder E. Determine the horizontal and vertical components of reaction at A andD. -1.2 m- 0.1 m D. 0,6 m
Nitrite (NO 2 - ) can be determined by oxidation with excess Ce 4+ , followed by back titration of the unreacted Ce 4+ . A 4.030-g sample of solid containing only NaNO 2 (FM 68.995) and NaNO 3 was...
Now consider a version of the bakery algorithm without the variable choosing. Then we have Int number[n]; While (true) { Number[i] = 1 + getmax (number [], n); For (int j = 0; j < n; j++) { While...
The pipe of mass M is supported at A by a system of five cords. Determine the force in each cord for equilibrium. Given: M = 30 kg c = 3 g = 9.81 m/s2 d = 4 θ = 60 deg B E
The two blocks shown are released from rest. Neglecting the masses of the pulleys and the effect of friction in the pulleys and knowing that the coefficients of friction between both blocks and the...
A 10-lb collar rests on but is not attached to the spring shown. It is observed that when the collar is pushed down 9 in. or more and released, it loses contact with the spring. Determine (a) The...
The chandelier is supported by three chains which are concurrent at point O. If the resultant force at O has magnitude FR and is directed along the negative z axis, determine the force in each chain...
A floor truss is loaded as shown. Determine the force in members FI, HI, and HJ. 250 lh 500 l 4 ft 300 th a75 ib S30 th a50 h 195 lh 4 ft 4ft 4ft 4ft 4ft EV 2 It
A heating contractor must heat 0.2 kg/s of water from 15C to 35C using hot gases in cross flow over a thin-walled tube. Your assignment is to develop a series of design graphs that can be used to...
(a) A 60-kg woman rides a 7-kg bicycle up a 3 percent slope at a constant speed of 2 m/s. How much power must be developed by the woman? (b) A 90-kg man on a 9-kg bicycle starts down the same slope...
Rod AB is welded to the 12-in.-radius plate which rotates at the constant rate 1 = 6 rad/s. Knowing that collar D moves toward end B of the rod at a constant speed u = 78 in./s, determine, for the...
The mechanism shown is one of two identical mechanisms attached to the two sides of a 90-kg uniform rectangular door. Edge ABC of the door is guided by wheels of negligible mass that roll in...
The torsional coupling in the figure is composed of a curved beam of square cross section that is welded to an input shaft and output plate. A torque is applied to the shaft and cycles from zero to...
A cylinder/piston arrangement contains water at 105C, 85% quality with a volume of 1 L. The system is heated, causing the piston to rise and encounter a linear spring as shown in Fig. P3.105. At this...
An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100°C. Air enters the...
A continuous and aligned fiber-reinforced composite having a cross-sectional area of 1130 mm2 (1.75 in.2) is subjected to an external tensile load. If the stresses sustained by the fiber and matrix...
The hydraulic cylinder shown in the figure has a 3-in bore and is to operate at a pressure of 800 psi. With the clevis mount shown, the piston rod should be sized as a column with both ends rounded...
A heat pump cycle is executed with R134a under the saturation dome between the pressure limits of 1.8 and 0.2 MPa. The maximum coefficient of performance of this heat pump is (a) 1.1 (b) 3.6 (c) 5.0...
At the end of its manufacturing process, a silicon wafer of diameter D = 150 mm, thickness = 1 mm, and emissivity = 0.65 is at an initial temperature of T i = 325C and is an owed to cool in...
Two humid gas streams are combined in a heated mixing chamber. The first stream contains 23.5 mole% ethane and 76.5% ethylene on a dry basis and enters the chamber at 25C and 105kPa at a rate of...
Derive Equation 6.5-4 for the boiling-point elevation of a dilute solution of a nonvolatile solute with mole fraction x in a solvent that has a pure-component vapor pressure p s (T). To do so,...
For a polymer-matrix fiber-reinforced composite, (a) List three functions of the matrix phase. (b) Compare the desired mechanical characteristics of matrix and fiber phases. (c) Cite two reasons why...
A 15-tooth spur pinion has a module of 3 mm and runs at a speed of 1600 rev/min. The driven gear has 60 teeth. Find the speed of the driven gear, the circular pitch, and the theoretical...
The following reaction reaches equilibrium at 650oC and atmospheric pressure: N2(S) + C2H2(g) 2HCN(g) If the system initially is an equimolar mixture of nitrogen and acetylene, what is the...
The cord exerts a force of magnitude F on the hook. If the cord length L, the distance z, and the x component of the force, Fx, are given, determine the location x, y of the point of attachment B of...
Steel balls 12 mm in diameter are annealed by heating to 1150 K and then slowly cooling to 400 K in an air environment for which T , = 325 K and h = 20 W/m 2 K. Assuming the properties of the steel...
An uninsulated steam pipe is used to transport high-temperature steam from one building to another. The pipe is of 0.5-m diameter, has a surface temperature of 150C, and is exposed to ambient air at...
A thin sheet of fiberboard weighs 90 N and lies on a rooftop, as shown in the figure. Assume ambient air at 20°C and 1 atm. If the coefficient of solid friction between board and roof is σ...
Determine the moment of inertia for the overhung crank about the x' axis. The material is steel having density . Units used: Mg = 1000 kg Given: = 7.85Mg/m3 a = 20 mm b = 20 mm c = 50 mm d = 90 mm e...
Absorption with chernical reaction (a) Rework the problem discussed in the text in S18.4, but take z = 0 to be the bottom of the beaker and z = L at the gas-liquid interface. (b) In solving Eq....
Ruthven and Kaul [Ind. Eng. Chem. Res., 32, 2047-2052 (1993)l measured adsorption isotherms for a series of gaseous aromatic hydrocarbons on well-defined crystals of NaX zeolite over ranges of...
If the resultant of the four forces is F R = {?360k} lb, determine the tension developed in each cable. Due to symmetry, the tension in the four cables is the same. Fc 6 ft 3it
The square threaded screw of the clamp has a mean diameter of 14 mm and a lead of 6 mm. If ? s = 0.2 for the threads, and the torque applied to the handle is 1.5 N ? m, determine the compressive...
Determine the moment of inertia for the solid steel assembly about the x axis. Steel has a specific weight st. Given: a = 2 ft b = 3 ft c = 0.5 ft d = 0.25 ft st = 490lb/ft3
Determine the magnitudes of F1, F2, and F3 for equilibrium of theparticle. 135 800 Ib 60 200 lb
Consider three options for heating a house. Electric resistance heating with electricity priced at $0.10/kWh, gas heating with gas priced at $1.10/Therm and oil (density 0.8 kg/L, heating value 46.5...
For methyl chloride at 100(C the second and third virial coefficients are: Calculate the work of mechanically reversible, isothermal compression of 1 mol of methyl chloride from 1 bar to 55 bar at...
Diesel fuel (C12H26) at 25C is burned in a steady flow combustion chamber with 20 percent excess air that also enters at 25C. The products leave the combustion chamber at 500 K. Assuming combustion...
Determine the force in members BE, EF, and CB, and state if the members are in tension or compression. Units Used: kN = 103 N Given: F1 = 5kN F4 = 10kN F2 = 10kN a = 4 m F3 = 5kN b = 4 m F1
Determine by direct integration the centroid of the area shown. Express your answer in terms of a and b. =Dk(x-a)2
To a good approximation the dynamic viscosity , the thermal conductivity k, and the specific heat c p are independent of pressure. In what manner do the kinematic viscosity v and thermal diffusivity...
Determination of Lennard-Jones potential parameters from diffusivity data of a binary, gas mixture (a) Use the following data 5 for the system H 2 O-O 2 at 1atm pressure to determine AB and AB /k:...
Nitrite (NO2) was measured by two methods in rainwater and unchlorinated drinking water. The results standard deviation (number of samples) are Sample source Gas chromatography Spectrophotometry Rain...
The velocities of commuter trains A and B are as shown. Knowing that the speed of each train is constant and that B reaches the crossing 10 min after A passed through the same crossing, determine (a)...
Flow between two tanks (Fig. 7B.4). Case I: A fluid flows between two tanks A and B because PA > PB. The tanks are at the same elevation and there is no pump in the line. The connecting line has a...
A steel tube (k = 50 W/m K) of inner and outer diameters D i = 20 mm and D o = 26 mm. respectively, is used to transfer heat from hot gases flowing over the tube (h h = 200 W/m 2 K) to cold water...
(a) The differential equation Has initial conditions x(0) = 1, x?(0) = 2. Find Y(s) and, without finding y(t), determine what functions of time will appear in the solution. d'y + 6 + 9y cos di
The framework is supported by the member AB which rests on the smooth floor. When loaded, the pressure distribution on AB is linear as shown. Determine the length d of member AB and the intensity w...
Write a UNIX program that creates a child process that prints a greeting, sleeps for 20 seconds, then exits. The parent process should print a greeting before creating the child, and another after...
A schematic diagram for a pH neutralization process is shown in Fig. E. The transfer function matrix and relative gain array are also shown. (a) Suppose that a multiloop control system consisting of...
The heat of hydration of dough, which is 15 kJ/kg will raise its temperature to undesirable levels unless some cooling mechanism is utilized. A practical way of absorbing the heat of hydration is to...
A soap bubble of diameter D1 coalesces with another bubble of diameter D2 to form a single bubble D3 with the same amount of air. For an isothermal process, express D3 as a function of D1, D2, patm,...
The rig shown consists of a 5.4-kN horizontal member ABC and a vertical member DBE welded together at B and is used to raise a 16.2-kN crate. Determine (a) The required tension in cable ADCF if the...
Knowing that the tension in wire BD is 300 lb, determine the reaction at fixed support C for the frame shown. 180 Ib 6 in. 10 in. -20 in. 100 lb 24 in. 16 in.
The formation of tetrafluoroethylene from its elements is highly exothermic: (a) If a mixture of F2, graphite, and C2F4 is at equilibrium in a closed container, will the reaction go to the right or...
The critical resolved shear stress for iron is 27MPa (4000psi). Determine the maximum possible yield strength for a single crystal of Fe pulled in tension.
A solution was prepared by mixing 25.00 mL of 0.080 0 M aniline, 25.00 mL of 0.060 0 M sulfanilic acid, and 1.00 mL of 1.23 10 -4 M HIn and then diluting to 100.0 mL. (HIn stands for protonated...
The figure shows a welded fitting which has been tentatively designed to be bolted to a channel so as to transfer the 2500-lbf load into the channel. The channel is made of hot-rolled low carbon...
Consider application of the naphthalene sublimation technique (Problem 6.51) to a gas turbine blade that is coated with naphthalene and has a surface area of As = 0.05 m2 To determine the average...
The motion of the uniform rod AB of mass 8 kg and length h L = 900 mm is guided by small wheels of negligible mass that roll on the surface shown. If the rod is released from rest when =20?,...
Rank the following ironcarbon alloys and associated microstructures from the highest to the lowest tensile strength: (a) 0.25 wt%C with spheroidite, (b) 0.25 wt%C with coarse pearlite, (c) 0.60 wt%C...
The beam is subjected to the parabolic loading. Determine an equivalent force and couple system at pointA. 400 Ib/ft
The maximum band interface pressure on the brake shown in the figure is 90 psi. Use a 14-indiameter drum, a band width of 4 in, a coefficient of friction of 0.25, and an angle-of-wrap of 270. Find...
Determine by direct integration the centroid of the area shown. Express your answer in terms of a and h.
An aluminum transmission line with a diameter of 20 mm has an electrical resistance of R' elec = 2.636 x 10 -4 n/m and carries a current of 700 A. The line is subjected to frequent and severe cross...
A rectangular plate is supported by three cables as shown. Knowing that the tension in cable AD is 120 lb, determine the weight of the plate. Djunnsious in ioehes
A 0.3-cm thick aluminum plate has rectangular fins on one side, 0.16 0.6 cm, spaced 0.6 cm apart. The finned side is in contact with low pressure air at 38?C and the average heat transfer...
An air-conditioning system requires airflow at the main supply duct at a rate of 180 m3/min the average velocity of air in the circular duct is not to exceed 10 m/s to avoid excessive vibration and...
Consider a pressure surge system to reduce the effect of pressure variations at a compressor outlet on the pressure in a compressed gas header. We want to develop a two-tank model and evaluate the...
The figure depicts a band brake whose drum rotates counterclockwise at 200 rev/min. The drum diameter is 16 in and the band lining 3 in wide. The coefficient of friction is 0.20. The maximum lining...
An ideal gas undergoes a process between two specified temperatures, first at constant pressure and then at constant volume. For which case will the ideal gas experience a larger entropy change?...
A sheet of cellulose acetate film containing 5.00wt% liquid acetone enters an adiabatic dryer where 90% of the acetone evaporates into a stream of dry air flowing over the film. The film enters the...
A 2.077 g sample of an element, which has an atomic mass between 40 and 55, reacts with oxygen to form 3.708 g of an oxide. Determine the formula of the oxide and identify the element.
To lift a heavy crate, a man uses a block and tackle attached to the bottom of an I-beam at hook B. Knowing that the man applies a 200-lb force to end A of the rope and that the moment of that force...
Consider a subsonic compressible flow in Cartesian coordinates where the velocity potential is given by If the free stream properties are given by V? = 700 ft/s, p? = 1atm, and T? = 519R, calculate...
A dry gas containing 10.0% NH 3 by volume is contacted with water at 10C and 1 atm in a single-stage bubble contactor. The effluent liquid and gas streams may be considered to be in equilibrium with...
A spherical satellite of diameter D is in orbit about the earth and is coated with a diffuse material for which the spectral absorptivity is ?? = 0.6 for A 3?m. When it is on the "dark" side of the...
Two identical cars A and B are at rest on a loading dock with brakes released. Car C, of a slightly different style but of the same weight, has been pushed by dockworkers and hits car B with a...
The adiabatic flame temperature of a fuel is the temperature achieved if the fuel is burned completely in a perfectly insulated container. You are performing an experiment to measure the adiabatic...
Determine the moment of each force about the bolt located at A. Given: FB = 40 lb a = 2.5 ft α = 20 deg γ = 30 deg FC = 50 lb b = 0.75 ft β = 25 deg Fc FB
A plant has a batch of 100 kmol of a liquid mixture containing 20 mol% benzene and 80 mol% chlorobenzene. It is desired to rectify this mixture at 1 atm to obtain bottoms containing only 0.1 mol%...
A conventional multiloop control scheme consisting of two PI controllers is to be used to control the product compositions xD and xB of the distillation column shown in Fig. The manipulated variables...
Find the power required to drive a 40-mm power screw having double square threads with a pitch of 6 mm. The nut is to move at a velocity of 48 mm/s and move a load of F = 10 kN. The frictional...
Consider the following program: Const int n = 50; Int tally; Void total () { Int count; For (count = 1; count
Forced air at 25C and 10 m/s is used to cool electronic elements mounted on a circuit board. Consider a chip of length 4 mm and width 4 mm located 120 mm from the leading edge. Because the board...
A six-pole, 60-Hz synchronous machine has a rotor winding with a total of 138 series turns and a winding factor kr = 0.935. The rotor length is 1.97 m, the rotor radius is 58 cm, and the air-gap...
Formaldehyde is produced by decomposing methanol over a silver catalyst: CH3OH HCHO + H2 To provide heat for this endothermic reaction, some oxygen is included in the feed to the reactor leading to...
The post is to be pulled out of the ground using two ropes A and B. Rope A is subjected top a force of 600 lb and is directed at 60 from the horizontal. If the resultant force acting on the post is...
Derive the equations given for beam 2 in Table A9 using statics and the double-integration method.