The uniform 20-lb ladder rests on the rough floor for which the coefficient of static friction is ? s = 0.8 and against the smooth wall at B. Determine the horizontal force P the man must exert on...

Serious neck injuries can occur when a football player is struck in the face guard of his helmet in the manner shown, giving rise to a guillotine mechanism. Determine the moment of the knee force P =...

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...

Boom AB is held in the position shown by three cables. Knowing that the tensions in cables AC and AD are 4 kN and 5.2 kN, respectively, determine (a) The tension in cable AE if the resultant of the...

Two identical slender rods AB and BC are welded together to form an L-shaped assembly. The assembly is pressed against a spring at D and released from the position shown. Knowing that the maximum...

A stage of a separation process is defined as an operation in which components of one or more feed streams divide themselves between two phases, and the phases are taken off separately. In an ideal...

An electrical coil is used to heat 20.0 kg of water in a closed well-insulated vessel. The water is initially at 25C and 1 atm. The coil delivers a steady 2.50 kW of power to the vessel and its...

A parallel chord Howe truss is loaded as shown. Determine the force in members GI, GJ, and HJ.

For the frame and loading shown, determine the components of the forces acting on member CFE at C and at F. 6 in. 40 Ib 4 in. -5 in.4 in.--4 in

Bonding with a thermo setting adhesive (Fig. 12A.3). it is desired to bond together two sheets of a solid material, each of thickness 0.77 cm. This is done by using a thin layer of thermosetting...

Solve Example 5.3 for an absorbent flow rate of 330 lbmol/h and three theoretical stages. Compare your results to the results of Example 5.3 and discuss the effect of trading stages for absorbent...

A well-insulated shell-and-tube heat exchanger is used to heat water (cp = 4.18 kJ/kg C) in the tubes from 20 to 70C at a rate of 4.5 kg/s. Heat is supplied by hot oil (cp = 2.30 kJ/kg C) that...

A simple ideal Brayton cycle is modified to incorporate multistage compression with intercooling, multistage expansion with reheating, and regeneration without changing the pressure limits of the...

A process fluid having a specific heat of 3500 J/kg K and flowing at 2 kg/s is to be cooled from 80C to 50C with chilled water, which is supplied at a temperature of 15C and a flow rate of 2.5 kg/so...

A ferromagnetic material has a remanence of 1.25 teslas and a coercivity of 50,000 A/m. Saturation is achieved at a magnetic field intensity of 100,000 A/m, at which the flux density is 1.50 teslas....

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...

A process stream flowing at 35k mol/h contains 15 mole% hydrogen and the remainder 1-butene. The stream pressure is 10.0 atm absolute, the temperature is 50C, and the velocity is 150m/min. Determine...

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...

The walls of a refrigerator are typically constructed by sandwiching a layer of insulation between sheet metal panels. Consider a wall made from fiberglass insulation of thermal conductivity k; =...

Freeze concentration is used to produce a fruit-juice concentrate. A stream of fresh juice containing 12 wt% soluble solids in water at 20C is combined with a recycle stream to form a...

Water is added to pure sulfuric acid in a well-insulated flask initially at 25C and 1 atm to produce a 4.00-molar sulfuric acid solution (SG = 1.23 1). The final temperature of the product solution...

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...

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...

Repeat Example 5.3 for N = 1, 3, 10, and 30 stages. Plot the percent absorption of each of the five hydrocarbons and the total feed gas, as well as the percent stripping of the oil versus the number...

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...

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...

Locate the centroid of the plane area shown. 2= 150 mm r,= 75 mm

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...

For a ceramic compound, what are the two characteristics of the component ions that determine the crystal structure?

Locate the center of mass of the homogeneous rod bent into the shape of a circular arc. Given: r = 300 mm = 30 deg

A speech signal has a total duration of 10 s. It is sampled at the rate of 8 kHz and then encoded. The signal-to-(quantization) noise ratio is required to be 40 dB. Calculate minimum storage capacity...

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 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

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...

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...

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 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...

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

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...

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

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...

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...

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...

The handle of the sector press is fixed to gear G, which in turn is in mesh with the sector gear C. Note that AB is pinned at its ends to gear C and the underside of the table EF, which is allowed to...

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...

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...

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.

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...

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....

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,...

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...

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...

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

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...

A rectangular aluminum bar 10 mm thick and 60 mm wide is welded to fixed supports at the ends, and the bar supports a load W = 4 kN, acting through a pin as shown. Find the reactions at the supports...

The structure is subjected to the loadings shown. Member AB is supported by a ball-and-socket at A and smooth collar at B. Member CD is supported by a pin at C. Determine the x, y, z components of...

(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...

Driving an automobile safely requires a large amount of individual skill. Even if not generally recognized, the driver needs an intuitive ability to utilize feedforward and feedback control methods....

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...

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...

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 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...

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...

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...

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 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...

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...

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...

Determine by direct integration the centroid of the area shown. Express your answer in terms of a and b. =Dk(x-a)2

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 pressure-measuring device has been analyzed and can be described by a model with the structure shown in figure a. In other words1 the device responds to pressure changes as if it were a first-order...

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...

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

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

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:...

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...

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...

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)...

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?,...

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...

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...

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...

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...

One end of a 0.3 m long steel rod is connected to a wall at 204?C. The other end is connected to a wall which is maintained at 93?C. Air is blown across the rod so that a heat transfer coefficient of...

Standard addition. A particular CO2 compound electrode like the one in Figure 14-28 obeys the equation E = constant - [RT (ln 10)/2F] log[CO2], where R is the gas constant, T is temperature (303.15...

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...

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 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...

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...

The machine base shown has a mass of 75 kg and is fitted with skids at A and B. The coefficient of static friction between the skids and the floor is 0.30. If a force P of magnitude 500 N is applied...

Sub-limitation of small iodine spheres in still air. A sphere of iodine, 1 cm in diameter, is placed in still air at 40C and 747 mm Hg pressure. At this temperature the vapor pressure of iodine is...

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...

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.

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 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 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...

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...

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

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...