An adiabatic air compressor is to be powered by a direct-coupled adiabatic steam turbine that is also driving a generator. Steam enters the turbine at 12.5 MPa and 500°C at a rate of 25 kg/s and...

For the frame and loading of Prob. 6.99, determine the internal forces at a point J located halfway between points B and E. -200- -200- 150 300 150 Dimensions in mm

Bars AB and BE, each of weight 8 lb, are welded together and are pin-connected to two links AC and BD. Knowing that the assembly is released from rest in the position shown and neglecting the masses...

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 . a. Show how the processes can use enableInterrupt ( ) and...

A process that can be modeled as a time delay is controlled using a proportional feedback controller. The control valve and measurement device have negligible dynamics and steady-state gains of Kv =...

Professor Walter Tunnel must measure velocity in a water tunnel. Due to budgetary restrictions, he cannot afford a pitot-static tube, so he inserts a total-head probe and a static-head probe, as...

Air enters a compressor at ambient conditions of 15 psia and 60F with a low velocity and exits at 150 psia, 620F, and 350 ft/s. The compressor is cooled by the ambient air at 60F at a rate of 1500...

Show that the transmission line model shown in Fig. 2-37 (P2.4) yields the same telegraphers equations given by Eqs. (2.14) and (2.16)

An ideal steam power plant is designed to operate on the combined reheat and regenerative cycle and to produce a net power output of 10 MW. Steam enters the high-pressure turbine at 8 MPa, 550C, and...

A light train made up of two cars is traveling at 55 mi/h when the brakes are applied to both cars. Knowing that car A has a weight of 55,000 lb and car B has a weight of 44,000 lb and that the...

A 250-kg crate B is suspended from a cable attached to a 20-kg trolley A which rides on an inclined I-beam as shown. Knowing that at the instant shown the trolley has an acceleration n of 0.4 m/s2 up...

A chain of length l and mass m lies in a pile on the floor. If its end A is raised vertically at a constant speed v, express in terms of the length y of chain which is off the floor at any given...

A process is characterized approximately by the transfer function (a) If its input u changes linearly, that is, u(t) = EtHow much would the response y(t) appear to lag the input u(t) fort >> ?1?(b)...

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...

In an effort to move the two crates, each of weight W, which are stacked on top of one another, the man pushes horizontally on them at the bottom of crate A as shown. Determine the smallest force P...

Consider a horizontal 6-mm-thick, 100-mm-Iong straight fin fabricated from plain carbon steel (k = 57 W/m K, = 0.5). The base of the fin is maintained at 150C, while the quiescent ambient air and...

Determine the moments of inertia of the shaded area shown with respect to the x and y axes. -2a-

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...

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...

The wall shear stress w in a boundary layer is assumed to be a function of stream velocity U, boundary layer thickness , local turbulence velocity u, density , and local pressure gradient dp/dx....

An adiabatic heat exchanger is used to heat cold water at 15C entering at a rate of 5 kg/s by hot water at 90C entering at a rate of 4 kg/s. If the exit temperature of hot water is 50C, the exit...

Is the isentropic process a suitable model for compressors that are cooled intentionally? Explain.

The composition of moist air is given on a molar basis to be 78 percent N2, 20 percent O2, and 2 percent water vapor. Determine the mass fractions of the constituents of air.

The 4-in.-radius wheel shown rolls to the left with a velocity of 45 in./s. Knowing that the distance AD is 2.5 in., determine the velocity of the collar and the angular velocity of rod AB when (a) ...

The heat of solution of ammonia in water at 1 atm is Hs (25C, r = 2 mol H2O/mol NH3) = 78.2 kJ/mol Calculate the enthalpy change that accompanies the dissolution of 400 mol of NH3 in 800 mol of water...

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)...

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...

Knowing that WA = 40lb, WB = 52 lb, and θ =25°, determine (a) Whether the system is in equilibrium, (b) The magnitude and direction of the friction force. H, =0.35 H =0.25

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...

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 =...

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 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...

One kilomole of an equimolar mixture of benzene and toluene is fed to a batch still containing three equivalent stages (including the boiler). The liquid reflux is at its bubble point, and L/D = 4....

Underground water is being pumped into a pool whose cross section is 3 m 4 m while water is discharged through a 5-cm-diameter orifice at a constant average velocity of 5 m/s. If the water level in...

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...

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 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...

Two 2.4-kg slender rods are bent to form two square frames which are welded at the one-third points of the 600-mm shaft AB to form the assembly shown. Knowing that the assembly rotates with an...

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...

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...

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...

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...

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...

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 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...

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...

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...

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

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...

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...

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...

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...

Estimate the electrical conductivity, at 85C, of silicon that has been doped with 1020 m3 of phosphorus atoms.

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...

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?

For the portion of a machine shown, the 4-in.-diameter pulley A and wheel B are fixed to a shaft supported by bearings at C and D. The spring of constant 2 lb/in. is unstretched when = 0, and the...

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...

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...

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...

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...

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...

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...

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-

Locate the centroid of the plane area shown. 2 in. -2 in 3 in. 2 in.

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...

Explain what the O_FILE_APPEND_DATA flag is used for as a value for the dwFile ACCESS argument in Windows file I/O.

Water is used to remove CO2 from air by absorption in a column packed with Pall rings. At a certain region of the column where the partial pressure of CO2 at the interface is 150 psia and the...

Locate the centroid of the plane area shown. 9 in. 8 in. 45 in 6 in. 9 in.

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).

The horizontal x axis is drawn through the centroid C of the area shown and divides the area into two component areas A1 and A2. Determine the first moment of each component area with respect to the...

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...

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...

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...

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.

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...

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,...

An electric room heater has been designed in the shape of a vertical cylinder 2 m tall and 30 cm in diameter. For safety, the heater surface cannot exceed 35?C. If the room air is 20?C, find the...

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...

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 uniform thin disk of 6-in. diameter is attached to the end of a rod AB of negligible mass which is supported by a ball-and-socket joint at point A. Knowing that the disk is spinning about its axis...

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....

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...

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...

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 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...

Draw the shear and moment diagrams for the beam. L/2 L/2

A steam turbine receives steam at 6 MPa, 800C. 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 20C, find the...

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 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)...

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...

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

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...

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...

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...

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 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...

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.

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.