The production supervisor of a small pharmaceutical firm has observed a decreasing demand for potassium regurgitol (PRG) over a two-month period, and since the plant manager has been throwing up the...
The diagram below shows three continuous stirred tanks connected in series. The flow and mixing patterns in this system arc studied by dissolving 1500 g of a salt (S) in the first tank, filling each...
A water-isopropanol mixture at its bubble point containing 10 mol% isopropanol is to be continuously rectified at atmospheric pressure to produce a distillate containing 67.5 mol% isopropanol....
Determine the height and diameter of a vertical flash drum for the conditions shown in Figure 7.48. Ibmol/h nC4 nC5 nC6 187.6 176.4 82.5 224.3F 102.9 psia Ibmol/h nC4 nC5 Cs 112.4 223.6 217.5 Figure...
The A-frame is being hoisted into an upright position by the vertical force of F = 80 lb. Determine the moment of this force about the y axis when the frame is in the positionshown. 15
The maximum surface temperature of the 20-mm. diameter shaft of a motor operating in ambient air al 27C should not exceed 87C. Because of power dissipation within the motor housing, it is desirable...
The dynamic behavior of the liquid Level in each leg of a manometer tube, responding to a change in pressure, is given by where h?(t) is the level of fluid measured with respect to the initial...
A unit mass of a substance undergoes an irreversible process from state 1 to state 2 while gaining heat from the surroundings at temperature T in the amount of q. If the entropy of the substance is...
(a) Determine by direct integration the polar moment of inertia of the area shown with respect to point O. (b) Using the result of part a, determine the moments of inertia of the given area with...
When a flammable liquid (such as gasoline or charcoal lighter fluid) ignites, it is not the liquid itself that burns: what actually happens is that the liquid vaporizes and the resulting airvapor...
A three-phase Y- transformer is rated 225-kV: 24-kV, 400 MVA and has a series reactance of 11.7 as referred to its high-voltage terminals. The transformer is supplying a load of 325 MVA, with 0.93...
A furnace with a long isothermal graphite tube of diameter D = 12.5 mm is maintained at Tf = 2000 K and is used as a blackbody source to calibrate heat flux gages. Traditional heat flux gages are...
It takes 5 h to dry a wet solid, contained in a tray, from 36 to 8% moisture content, using air at constant conditions. Additional experiments give critical- and equilibrium-moisture contents of 15%...
Saturated water vapor at 150C is compressed in a reversible steady-flow device to 1000 kPa while its specific volume remains constant. Determine the work required, in kJ/kg.
A 3-in-diameter solid steel shaft, used as a torque transmitter, is replaced with a 3-in hollow shaft having a -in wall thickness. If both materials have the same strength, what is the percentage...
A piston/cylinder assembly contains 1 kg of liquid water at 20oC and 300 kPa. There is a linear spring mounted on the piston such that when the water is heated the pressure reaches 1 MPa with a...
Determine the force in each member of the truss and state if the members are in tension or compression. Units Used: kip = 103 lb Given: F1 = 2 kip F2 = 1.5 kip F3 = 3 kip F4 = 3 kip a = 4 ft b = 10...
A shell-and-tube heat exchanger must be designed to heat 2.5 kg/s of water from 15 to 85C. The heating is to be accomplished by passing hot engine oil, which is available at 160C, through the shell...
Write the Henderson-Hasselbalch equation for a solution of formic acid. Calculate the quotient [HCO-2 ]/[HCO2H] at (a) pH 3.000; (b) pH 3.744; (c) pH 4.000.
For the curved beam shown, F = 30 kN. The material is steel with E = 207 iGPa and G = 79 GPa. Determine the relative deflection of the applied forces. 50 40 10 Section A-A (All dimensions in...
Arm AB has a constant angular velocity of 16 rad/s counterclockwise. At the instant when = 0, determine the acceleration (a) Of collar D, (b) Of the midpoint G of bar BD. 200 mm 120 mm
A liquid mixture contains N components (N may be any number from 2 to 10) at pressure P(mm Hg). The mole fraction of the ith component is x i (i = 1. 2...., N), and the vapor pressure of that...
A high-temperature gas reactor (HTGR) consists of spherical, uranium oxide fuel elements in which there is uniform volumetric heating (q). Each fuel element is embedded in a graphite spherical shell...
Two rods are connected by a slider block as shown. Neglecting the effect of friction, determine the couple A M required to hold the system in equilibrium. 25 N m 25 150 m -150 mm
Gaseous hydrogen at 10 bars and 27C is stored in a 100-mm-diameter spherical tank having a steel wall 2 mm thick. The molar concentration of hydrogen in the steel is 1.50k mol/m3 at the inner surface...
A multiprocessor with eight processors has 20 attached tape drives. There is a large number of jobs submitted to the system that each require a maximum of four tape drives to complete execution....
Consider a homeowner who is replacing his 25-yearold natural gas furnace that has an efficiency of 55 percent. The homeowner is considering a conventional furnace that has an efficiency of 82 percent...
The wooden table is made from a square board having weight W. Each of the legs has weight Wleg and length L. Determine how high its center of gravity is from the floor. Also, what is the angle,...
A 16-kg triangular plate is supported by three wires as shown. Knowing that a = 150 mm, determine the tension in each wire. 600 mm 400 mm- 200 min,
An open tube, 1 mm in diameter and 6 in. long, has pure hydrogen blowing across one end and pure nitrogen blowing across the other. The temperature is 75C. (a) For equimolar counterdiffusion, what...
Determine the magnitude of force P needed to start towing the crate of mass M. Also determine the location of the resultant normal force acting on the crate, measured from point A. Given: M = 40 kg c...
Single fuel cells such as the one of Example 1.4 can be scaled up by arranging them into a fuel cell stack. A stack consists of multiple electrolytic membranes that are sandwiched between...
A 5-kg uniform square plate is supported by two identical 1.5-kg uniform slender rods AD and BE and is released from rest in the position = 45?. Knowing that the angular velocity of AD as it passes...
An electrical power transformer of diameter 230 mm and height 500 mm dissipates 1000 W. It is desired to maintain its surface temperature at 47C by supplying ethylene glycol at 24C through...
During a high-speed chase, an 1100-kg sports car traveling at a speed of 160 km/h just loses contact with the road as it reaches the crest A of a hill.(a) Determine the radius of curvature ? of the...
The fat stored in a camel's hump is a source of both energy and water. Calculate the mass of H2O produced by metabolism of 1.0 kg of fat, assuming the fat consists entirely of tristearin (C57H110O6),...
Liquid water enters an adiabatic piping system at 15C at a rate of 8 kg/s. If the water temperature rises by 0.2C during flow due to friction, the rate of entropy generation in the pipe is (a) 23 W/K...
A gearbox is to be designed with a compound reverted gear train that transmits 25 horsepower with an input speed of 2500 rev/min. The output should deliver the power at a rotational speed in the...
The position of the spindle DE of a lift truck is partially controlled by two identical linkage-and-hydraulic-cylinder systems, only one of which is shown. A 3000-lb spool of electric cable is held...
Consider the water heater described in Problem 1.37. We now wish to determine the energy needed to compensate for heat losses incurred while the water is prescribed temperature of 55C. The...
Pin C is attached to rod CD and slides in a slot cut in arm AB. Knowing that rod CD moves vertically upward with a constant velocity v0, derive an expression for the angular acceleration of arm AB. A...
(a) If the base of the radiator is maintained at Tb = 80C, what is its tip temperature and the rate of heat rejection? Use a computer-based, finite-difference method with a space increment of 0.1 m...
Pulverized coal pellets, which may be approximated as carbon spheres of radius r o = 1 mm, are burned in a pure oxygen atmosphere at 1450 K and 1 atm. Oxygen is transferred to the particle surface by...
Water from a storm drains flows over an outfall onto a porous bed which absorbs the water at a uniform vertical velocity of 8 mm/s, as shown in Fig. P3.19 The system is 5 m deep into the paper. Find...
Two space trusses are used to equally support the uniform sign of mass M. Determine the force developed in members AB, AC, and BC of truss ABCD and state if the members are in tension or compression....
Determine the surface area of the roof of the structure if it is formed by rotating the parabola about the y axis. Given: a = 16 m b = 16 m b.
An engineer wishes to determine the shearing strength of a certain epoxy cement. The problem is to devise a test specimen such that the joint is subject to pure shear. The joint shown in the figure,...
A vertical pistoncylinder device initially contains 0.25 m3 of air at 600 kPa and 300°C. A valve connected to the cylinder is now opened, and air is allowed to escape until three-quarters of the...
Saturated propane vapor at 2.00 x 10 2 psia is fed to a well-insulated heat exchanger at a rate of 3.00 x 10 3 SCFH (standard cubic feet per hour). The propane leaves the exchanger as a saturated...
An instrumentation transmitter pod is a box containing electronic circuitry and a power supply for sending sensor signals to a base receiver for recording. Such a pod is placed on a conveyor system,...
A process stream is heated using a shell and tube heat exchanger. The exit temperature is controlled by adjusting the steam control valve shown in figure. During an open-loop experimental test, the...
Derive an expression for the temperature distribution in a plane wall in which there are uniformly distributed heat sources which vary according to the linear relationqG = qw [1 ?? (T ?? Tw)]where qw...
From Figure it is evident that, over a wide temperature range, the temperature dependence of the thermal conductivity of many solids may be approximated by a linear expression of the form k = k o +...
Transpiration cooling (a) Calculate the temperature distribution between the two shells of Example 11.4-4 for radial mass flow rates of zero and 10 -5 g/s for the following conditions: (b) Compare...
Absorption with rapid second-order reaction (Fig. 20.1-2), make the following calculations for the reacting system depicted in the figure: (a) Verify the location of the reaction zone, using Eq....
For the steam-heated stirred-tank system modeled by Eqs 2-51 and 2-52, assume that the steam temperature Ts is constant. (a) Find a transfer function relating tank temperature T to inlet Liquid...
Replace the force system by an equivalent resultant force and couple moment at point O. Given: F1 = 60 lb a = 2 ft F2 = 85 lb b = 3 ft F3 = 25 lb c = 6 ft θ = 45 deg d = 4 ft e = 3 f = 4 F2 F1...
A major problem in packaging very large-scale integrated (VLSI) circuits concerns cooling of the circuit elements. The problem results from increasing levels of power dissipation within a chip, as...
A thin steel wire of uniform cross section is bent into the shape shown. Locate its center of gravity. 0.6m 0.Sm
As part of a design calculation, you must evaluate an enthalpy change for an obscure organic vapor that is to be cooled from 1800C to 150C in a heat exchanger. You search through all the standard...
A spherical droplet of liquid A and radius ro evaporates into a stagnant layer of gas B. Derive an expression for the evaporation rate of species A in terms of the saturation pressure of species A,...
A jacketed vessel similar to the one in Exercise 2.8 is used to heat a liquid by means of condensing steam. The following information is available: (i) The volume of liquid within the tank may vary....
Draw the free-body diagram of the truss that is supported by the cable AB and pin C. Explain the significance of each force acting on the diagram. (SeeFig) 30 2 m 3 kN 4 kN - m. 2 m 2 m 2 m
A coastal power plant takes in cooling water through a vertical perforated manifold, as in Fig. P4.72 The total volume flow intake is 110 m3/s. Currents of 25 cm/s flow past the manifold, as shown....
A 5-ft3 rigid tank contains 5 lbm of water at 20 psia. Determine (a) The temperature, (b) The total enthalpy, and (c) The mass of each phase of water.
Determine the coordinate direction angles of F, which is applied to the end A of the pipe assembly, so that the moment of F about O is zero. Given: F = 20 lb a = 8 in b = 6 in c = 6 in d = 10 in
The 5-in.-radius drum rolls without slipping on a portion of a belt which moves downward to the left with a constant velocity of 6 in./s. Knowing that at a given instant the velocity and acceleration...
The distribution coefficient of styrene distributed between ethylbenzene and ethylene glycol at 25C is 0.19mass fraction in the ethylene glycol phase per mass fraction in the ethylbenzene phase. One...
A liquid is placed in a well-insulated container, which is then sealed. Initially, the container and its contents (the Liquid and pure nitrogen) are at 93?C and 1 atm: the liquid volume is 70cm3, and...
A spherical satellite in near-earth orbit is exposed to solar irradiation of 1353 W/m2. To maintain a desired operating temperature, the thermal control engineer intends to use a checker pattern for...
Condenser cooling water for a power plant is stored in a cooling pond that is 1000 m long by 500 m wide. However, because of evaporative losses, it is necessary to periodically add "makeup" water to...
A thin-walled container with a hot process fluid at 50C is placed in a quiescent, cold water bath at 100C. Heat transfer at the inner and outer surfaces of the container may be approximated by free...
A cryogenic fluid flows through a tube 20 mm in diameter, the outer surface of which is diffuse and gray with an emissivity of 0.02 and temperature of 77 K. This tube is concentric with a larger tube...
The cable attached to the tractor at B exerts a force of 350 lb on the framework. Express this force as a Cartesianvector. F= 350 1b 35 ft SOR
A fluidized-bed dryer is to be sized to dry 5,000 kg/h (dry basis) of spherical polymer beads that are closely sized to 1 mm in diameter. The beads will enter the dryer at 25C with a moisture content...
The figure below shows a series of standard additions of Cu 2+ to acidified tap water measured by anodic stripping voltammetry at an iridium electrode. The unknown and all standard additions were...
A Fink roof truss is loaded as shown. Determine the force in members FH, FG, and EG. 15 15m 15 15 15 61N GAN JAN -15
The tool shown is used to crimp terminals onto electric wires. Knowing that a worker will apply forces of magnitude P = 135 N to the handles, determine the magnitude of the crimping forces that will...
Pin P is attached to the wheel shown and slides in a slot cut in bar BD. The wheel rolls to the right without slipping with a constant angular velocity of 20 rad/s. Knowing that x = 24 in. when = 0,...
The dynamic behavior of a packed-bed reactor can be approximated by a transfer function model where T 1 is the inlet temperature, T is the outlet temperature (?C), and the time constants are in...
An unknown solid is entirely soluble in water. On addition of dilute HCl, a precipitate forms. After the precipitate is filtered off, the pH is adjusted to about 1 and H2S is bubbled in; a...
A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 3 MPa and 50 kPa. The temperature of the steam at the turbine inlet is 300C, and the mass flow rate of...
The bent rod ABDE is supported by ball-and-socket joints at A and E and by the cable DF. If a 600-N load is applied at C as shown, determine the tension in the cable. 70 mun 90 mm 600 N 110 tmm 100...
The 100-mm-radius brake drum is attached to a flywheel which is not shown. The drum and flywheel together have a mass of 300 kg and a radius of gyration of 600 mm. The coefficient of kinetic friction...
The figure illustrates a number of beam sections. Use an allowable bending stress of 1.2 kpsi for wood and 12 kpsi for steel and find the maximum safe uniformly distributed load that each beam can...
Suppose processes P 0 and P 1 share variable V 2 , processes P 1 and P 2 share variable V 0 , and processes P 2 and P 3 share variable V 1 . In addition, P 0 , P 1 , and P 2 run concurrently. Write a...
Determine the phase condition of a stream having the following composition at 7.2oC and 2,620 kPa.Perform the calculations with a computer simulation program using at least three different options...
A bicycle tire is filled with air at 169.12 kPa (abs) and 30C. The valve breaks, and air exhausts into the atmosphere of 100 kPa (abs) and 20C. The valve exit is 2-mmdiameter and is the smallest area...
When a particle with charge q and mass m is introduced into a medium with a uniform field B such that the initial velocity of the particle u is perpendicular to B, as shown in Fig. 5-31 (P5.2), the...
A number of thin plates are to be cooled by vertically suspending them in a water bath at a temperature of 200C. If the plates are initially at 54C and are 0.15 m long what minimum spacing would...
Determine the force in members IL, GJ, and HK of the truss shown. 1.2AN 1iN IG 16m 1im 16 m L6m 1.6 16 D
Shown is the cross section of a molded flat-belt pulley. Determine its mass moment of inertia and its radius of gyration with respect to the axis AA. (The specific weight of brass is 0.306 lb/in3 and...
A 1.4-kg block is supported as shown by a spring of constant k = 400 N/m which can act in tension or compression. The block is in its equilibrium position when it is struck from below by a hammer...
The generator polynomial of a (15, 11 Hamming code is defined by g(X) = 1 + X + X4 develop the encoder and syndrome calculator for this code, using a systematic form for the code.
A shell-and-tube heat exchanger consisting of one shell pass and two tube passes is used to transfer heat from an ethylene glycol-water solution (shell side) supplied from a rooftop solar collector...
A mixture of A (more volatile) and B is being separated in a plate distillation column. In two separate tests run with a saturate- liquid feed of 40 mol% A, the following compositions, in mol% A were...
A hollow-fiber module has 4,000 ft2 of membrane surface area based on the inside diameter of the fibers, which are 42 ?m i.d. x 85 ?m 0.d. x 1.2 m long each. Determine:(a) The number of hollow fibers...
The rat trap shown in the figure uses two opposite-image torsion springs. The wire has a diameter of 0.081 in, and the outside diameter of the spring in the position shown is in. Each spring has 11...
A rigid tank is divided into two rooms by a membrane, both containing water, shown in Fig. P5.58. Room A is at 200 kPa, v = 0.5 m3/kg, VA = 1 m3, and room B contains 3.5 kg at 0.5 MPa, 400C. The...
A heat pump supplies heat energy to a house at the rate of 140,000 kJ/h when the house is maintained at 25C. Over a period of one month, the heat pump operates for 100 hours to transfer energy from a...