Determine the volume of the solid formed by revolving the shaded area about the x axis using the second theorem of Pappus?Guldinus. The area and centroid of the shaded area should first be obtained...
Two airstreams are mixed steadily and adiabatically. The first stream enters at 35oC and 30 percent relative humidity at a rate of 15 m3/min, while the second stream enters at 12oC and 90 percent...
A resistance heater operates inside a tank consuming 0.5 kW of electricity. Due to heat transfer to the ambient atmosphere at 300 K, the tank is maintained at a steady state. The surface temperature...
A plane wave in air with Is incident upon the planar surface of a dielectric material, with r = 4, occupying the half space z _ 0. Determine: (a) The polarization of the incident wave, (b)...
Estimate the nucleate pool boiling heat transfer coefficient for water boiling at atmospheric pressure on the outer surface of a platinum-plated 10-mm-diameter tube maintained 10C above the...
The block diagram of a feedback control system is shown in figure. Determine the values of Kc that result in a stable closed-loop system.
Water enters the pump of a steam power plant as saturated liquid at 20 kPa at a rate of 45 kg/s and exits at 6 MPa. Neglecting the changes in kinetic and potential energies and assuming the process...
The loose-fitting collar is supported by the pipe for which the coefficient of static friction at the points of contact A and B is s. Determine the smallest dimension d so the rod will not slip when...
Four small disks A, B, C, and D can slide freely on a frictionless horizontal surface. Disks B, C, and D are connected by light rods and are at rest in the position shown when disk B is struck...
Two identical 16-lb uniform cylinders are at rest when a constant couple M of magnitude 3 ft ??lb is applied to cylinder A. Knowing that the coefficient of kinetic friction between cylinder B and the...
Product solutions for unsteady heat conduction in solids (a) In Example 12.1-2 the unsteady state heat conduction equation is solved for a slab of thickness 2b. Show that the solution to Eq. 12.1-2...
A re-cooperator is a heat exchanger that heats air used in a combustion process by extracting energy from the products of combustion. It can be used to increase the efficiency of a gas turbine by...
A pistoncylinder device contains steam that undergoes a reversible thermodynamic cycle. Initially the steam is at 400 kPa and 350C with a volume of 0.3 m3. The steam is first expanded isothermally to...
The axis of the curved member AB is a parabola with its vertex at A. If a vertical load P of magnitude 1.8kN is applied at A, determine the internal forces at J when h = 240 mm, L = 800 mm, and a =...
A drum of 80-mm radius is attached to a disk of 160-mm radius. The disk and drum have a combined mass of 5 kg and combined radius of gyration of 120 mm. A cord is attached as shown and pulled with a...
A system is composed of four processes, { P 1 , P 2 , P 3 , P 4 }, two types of serially reusable resources, { S 1 , S 2 }, and two types of consumable resources, { C 1 , C 2 }. S 1 has two units and...
Explain what the O_FILE_APPEND_DATA flag is used for as a value for the dwFile ACCESS argument in Windows file I/O.
The production of paper involves a pulping step to break down wood chips into cellulose and lignin. In the Kraft process, an aqueous, pulping-feed solution, known as white liquor, is used that...
A satellite describes an elliptic orbit of minimum altitude 377 mi above the surface of the earth and semi major axis 10,840 mi, knowing that the speed of the satellite at point C is 2.97 mi/s, apply...
Estimate the electrical conductivity, at 85C, of silicon that has been doped with 1020 m3 of phosphorus atoms.
A distillation system consisting of a reboiler and a total condenser (no column) is to be used to separate A and B from a trace of nonvolatile material. The reboiler initially contains 20 lbmol of...
Hydrogen is burned with 150 percent theoretical air during a steady-flow process at a pressure of 1 atm. At what temperature will 98 percent of H2 burn to H2O? Assume the equilibrium mixture consists...
Determine the magnitude and directional sense of the moment of the forces about point P. Units Used: kN = 103 N Given: FB = 260 N e = 2 m a = 4 m f = 12 b = 3 m g = 5 c = 5 m θ = 30 deg d = 2 m...
The cage of a mine elevator moves downward at a constant speed of 12.2 m/s. Determine the magnitude and direction of the Coriolis acceleration of the cage if the elevator is located (a) At the...
A small disk of diameter D 1 = 50 mm and emissivity ? 1 = 0.6 is maintained at a temperature of T 1 = 900 K. The disk is covered with a hemispherical radiation shield of the same diameter and an...
Air at 1 atm flows at a Reynolds number of 50,000 normal to a long, circular, 1-in.-diameter cylinder made of naphthalene. Using the physical properties of Example 3.14 for a temperature of 100oC,...
Representative properties of small-pore silica gel are as follows: pore diameter = 24 A; particle porosity = 0.47; particle density = 1.09 g/cm3 and specific surface area = 800 m2/g (a) Are these...
A fixed mass of an ideal gas is heated from 50 to 80C (a) at constant volume and (b) at constant pressure. For which case do you think the energy required will be greater? Why?
Determine the force in each member of the Gambrel roof truss shown. State whether each member is in tension or compression. e kaps 2kps 2 kips 3.6 ft I kip I kip B. -121--12n--12 ft--12 ft-
As observed from a ship moving due east at 6 mi/h, the wind appears to blow from the south. After the ship has changed course and speed, and as it is moving due north at 4 mi/h, the wind appears to...
A 30-kg uniform circular plate of radius r is supported by a ball-and socket joint at point A and is at rest in the vertical xy plane when a bullet with a mass of 15 g is fired with the velocity v0 =...
Two parallel, aligned disks, 0.4 m in diameter and separated by 0.1 m, are located in a large room whose walls are maintained at 300 K. One of the disks is maintained at a uniform temperature of 500...
Consider the pole-zero plot shown in figure(a) Does it represent an FIR filter?(b) Is it a linear-phase system?(c) Give a direct form realization that exploits all symmetries to minimize the number...
Assume it takes an average of 2.5 clock cycles to execute an instruction in a one address machine language (that is, each individual instruction can reference at most one memory location). Estimate...
Liquid octane (C8H18) enters a steady-flow combustion chamber at 25C and 8 atm at a rate of 0.8 kg/min. It is burned with 200 percent excess air that is compressed and preheated to 500 K and 8 atm...
Locate the centroid of the plane area shown. 2 in. -2 in 3 in. 2 in.
A contractor must select a roof covering material from the two diffuse, opaque coatings with ??, (?) as shown. Which of the two coatings would result in a lower roof temperature? Which is preferred...
Suppose hardware was designed to incorporate three reference bits rather than the single bit used in the LRU implementation described in Section 12.3. Explain how a better approximation to LRU could...
A chain having a length L and weight W rests on a street for which the coefficient of static friction is s. If a crane is used to hoist the chain, determine the force P it applies to the chain if the...
Disk A, of mass 2 kg and radius r = 60 mm, is at rest when it is placed in contact with a belt which moves at a constant speed v = 15 m/s. Knowing that k = 0.20 between the disk and the belt,...
A small trailer and its load have a total weight of 500 lb. The trailer is supported by two springs, each of constant 350 lb/ft, and is pulled over a road, the surface of which can be approximated by...
Film theory with variable transport properties (a) Show that for systems in which the transport properties are functions of y, Eqs. 19.4-12 and 13 may be integrated to give for y < or y < T...
A very long electrical conductor 10 mm in diameter is concentric with a cooled cylindrical tube 50 mm in diameter whose surface is diffuse and gray with an emissivity of 0.9 and temperature of 27C....
Determine the force in each member of the truss and state if the members are in tension orcompression. 10 kN 8 kN 4 kN 3 kN 1.5 m 2 m
A continuous-time signal x c (t) is bandlimited to 5 kHz; i.e., X c (j) = 0 for || 2 (5000). x c (t) is sampled with period T, producing the sequence x [n] = x c (nT). To examine the spectral...
In a long, 30-cm square bar shown in the accompanying sketch, the left face is maintained at 40?C and the top face is maintained at 250?C. The right face is in contact with a fluid at 40?C through a...
The gasoline additive methyl t-butyl ether (MTBE) has been leaking into groundwater ever since its introduction in the 1990s. MTBE can be measured at parts per billion levels by solid-phase...
Given the network in Fig P 9.51, compute the input source voltage and the input power factor. 0.08 j0.2 0.01 j0.05 18 kW 40kW 086 pf lagging 0.8 pf lagging22020o V rms Figure P 9.51
Draw the shear and moment diagrams for the beam. L/2 L/2
Locate the centroid of the plane area shown. 9 in. 8 in. 45 in 6 in. 9 in.
A square hole is centered in and extends through the aluminum machine component shown. Determine (a) The value of a for which the mass moment of inertia of the component with respect to the axis...
Assuming blackbody behavior, determine the temperature of, and the energy emitted by, areas A1 in Example 12.1 and Problems 12.3, 12.5, and 12.14, as well as area Ah in Problem 12.12. Discuss.
Figure shows the cascade connection of a linear channel and a synchronous tapped delay-line equalizer. The impulse response of the channel is denoted by c (t), and that of the equalizer is denoted by...
A prototype ship is 35 m long and designed to cruise at 11 m/s (about 21 kn). Its drag is to be simulated by a 1-m-long model pulled in a tow tank. For Froude scaling find (a) the tow speed, (b) the...
Find Ct in the network in Figure P5.50 if (a) the switch is open and (b) the switch is closed. HF 12 Figure P5. 5t0
Weightless gate AB is 5 ft wide into the paper and opens to let fresh water out when the ocean tide is falling. The hinge at A is 2 ft above the freshwater level. Find h when the gate opens. Tide...
As shown in Fig. P6.94, a multi duct cross section consists of seven 2-cmdiameter smooth thin tubes packed tightly in a hexagonal bundle within a single 6-cm-diameter tube. Air, at about 20°C and...
A steam turbine receives steam at 6 MPa, 800C. It has a heat loss of 49.7 kJ/kg and an isentropic efficiency of 90%. For an exit pressure of 15 kPa and surroundings at 20C, find the...
A locking C-clamp is used to clamp two pieces of 1/4-in. steel plate. Determine the magnitude of the gripping forces produced when two 30-lb forces are applied as shown. -L9 in-13 tn.- -26 in. 0.55...
The Clean Air Act prohibited the production of chlorofluorocarbons (CFCs) in the United States as of 1996. One widely used CFC, refrigerant R-12, has been replaced by R-134a in many applications...
Two identical uniform cylinders of mass m and radius r are at rest at time t = 0 when a couple M of constant magnitude M M
Two tanks are connected by a valve and line as shown in Fig. P5.62. The volumes are both 1 m3 with R-134a at 20C, quality 15% in A and tank B is evacuated. The valve is opened and saturated vapor...
In the Otto cycle all the heat transfer qH occurs at constant volume. It is more realistic to assume that part of qH occurs after the piston has started its downwards motion in the expansion stroke....
Nitrogen gas flows into a convergent nozzle at 200 kPa, 400 K and very low velocity. It flows out of the nozzle at 100 kPa, 330 K. If the nozzle is insulated find the exit velocity.
Consider the conditions associated with the hot water pipe of Problem 7.56, but now account for the convection resistance associated with water flow at a mean velocity of U m = 0.5m/s in the pipe....
In a paging system, page boundaries are transparent to the programmer. Explain how a loop might cause thrashing in a static allocation paging system when the memory allocation is too small.
Using vapor pressure data from Exercises 4.6 and 4.8 and the enthalpy data provided below: (a) Construct an h-x-y diagram for the benzene-toluene system at 1 atm (101.3 kPa) based on the use of...
In ratio control, would the control loop gain for Method I (Fig) be Less variable if the ratio were defined as R = d/u instead of R = u/d? Justify youranswer. Disturbance stream, d FT "p Ratio...
A second-order system has a single zero: For a step input, show that: (a) y(t) can exhibit an extremum (maximum or minimum value) in the step response only if (b) Overshoot occurs only for ?0/?1. (c)...
Find Vo in the circuit shown using Thevenins Theorem +12v
Refer to the two-dimensional rectangular plate of Problem 4.2. Using an appropriate numerical method with x = y = 0.25 m, determine the temperature at the midpoint (1, 0.5).
Consider Problem 10.41 In an effort to increase the condensation rate an engineer proposes to apply a L = 100m thick Teflon coating to the exterior surface of the brass tube to promote drop wise...
Problem 5.96: For the machine element shown, locate the x coordinate of the center of gravity. Problem 5.97: For the machine element shown, locate the y coordinate of the center of gravity.
An unmodulated carrier of amplitude A c and frequency c and band-limited white noise are summed and then passed through an ideal envelope detector. Assume the noise spectral density to be of height...
The separation of air into nitrogen and oxygen is widely practiced. Cryogenic distillation is most economical for processing 100 to 5,000 tons of air per day, while pressure-swing-adsorption is...
As a block of wood is sanded, it exerts on the disk of the sander a force F of magnitude 1.8 lb. Knowing that the belt forces exerted on the 5-in.- diameter pulley lie in a plane parallel to yz...
Two small spheres A and B, with masses of 2.5 kg and 1 kg, respectively, are connected by a rigid rod of negligible mass. The two spheres are resting on a horizontal, frictionless surface when A is...
Two uniform rods, each of mass m and length l, are welded together to form an L-shaped assembly. The assembly is constrained by two springs, each of constant k, and is in equilibrium in a vertical...
Enabling and disabling interrupts to prevent timer interrupts from invoking the scheduler is one way to implement semaphores. This technique can influence I/O scheduler is one way to implement...
Suppose three people are in a line waiting for a department store to open for the big sale. When the door opens, all three rush the door, bur the door is not big though for all of them to pass...
At the end of Section 21.14 it was noted that the intensity of light absorbed while passing through a 16-kilometer length of optical fiber glass is equivalent to the light intensity absorbed through...
A refrigeration truck is traveling at 80 mph on a desert highway where the air temperature is 50?C. The body of the truck may be idealized as a rectangular box, 3 m wide, 2.1 m high, and 6 m long, at...
It is often stated that the refrigerator door should be opened as few times as possible for the shortest duration of time to save energy. Consider a household refrigerator whose interior volume is...
A heat pump that operates on the ideal vapor compression cycle with refrigerant-134a is used to heat a house. The mass flow rate of the refrigerant is 0.32 kg/s. The condenser and evaporator...
Consider the thick slab of copper in Example 5.10 which is initially at a uniform temperature of 20o0 and is suddenly exposed to large surroundings at 1000oC (instead of a prescribed heat flux). (a)...
Determine the maximum uniform loading w , measured in lb/ft, that the cable can support if it is capable of sustaining a maximum tension of 3000-lb before it will break. 50 ft 6 ft
A second-order system has a double pole at p1,2 = 0.5 and two zeros at z1.2 = ej3/4. Using geometric arguments, choose the gain G of the filter so that |H (0)| = 1.
Toluene is to be separated from biphenyl by ordinary distillation. The specifications for the separation are as follows: Temperature = 264oF; Pressure = 37.1 psia for the feed Reflux ratio = 1.3...
A process temperature sensor/transmitter in a fermentation reactor exhibits second-order dynamics with time constants of 1 s and 0.1 s. If the quantity being measured changes at a constant rate of...
Determine the coordinate angle ? for F 2 and then express each force acting on the bracket as a Cartesian vector. F, = 450 N 45 30 F = 600 N
A steam power plant operates on an ideal reheatregenerative Rankine cycle with one re-heater and two open feedwater heaters. Steam enters the high-pressure turbine at 1500 psia and 1100F and leaves...
A steam power plant operates on the reheat regenerative Rankine cycle with a closed feedwater heater. Steam enters the turbine at 12.5 MPa and 550C at a rate of 24 kg/s and is condensed in the...
Two unsaturated airstreams are mixed adiabatically. It is observed that some moisture condenses during the mixing process. Under what conditions will this be the case?
A vertical plate 500 mm high and 200 mm wide is to be used to condense saturated steam at 1 atm (a) At what surface temperature must the plate be maintained to achieve a condensation rate of m = 25...
Neglecting friction, determine the tension in cable ABD and the reaction at C when = 30 o . B.
In the simplified sketch of a ball bearing shown, the diameter of the inner race A is 2.5 in. and the diameter of each ball is 0.5 in. The outer race B is stationary while the inner race has an...
A thin ring of radius r = 12 in. is attached by a collar at point A to a vertical shaft which rotates with a constant angular velocity . Determine (a) The value of for which the ring forms a...
Write the chemical equation and the Kb expression for the reaction of each of the following bases with water: (a) Propylamine, C3H7NH2; (b) Monohydrogen phosphate ion, HPO42-; (c) Benzoate ion,...
A 28-g bullet is fired with a velocity of 550 m/s into a block A, which has a mass of 5 kg. The coefficient of kinetic friction between block A and the cart BC is 0.50. Knowing that the cart has a...
Plot the waveform of a GMSK modulator produced in response to the binary sequence 1101000, assuming the use of a gain-bandwidth product WTb = 0.3. Compare your result with that of Example 6.5.