The presence of a small amount of air may cause a significant reduction in the heat rate to a water-cooled steam condenser surface. For a clean surface with pure steam and the prescribed conditions,...
A two-input/two-output process involving simultaneous beating and liquid-level changes is illustrated in Figure. Find the transfer function models and expressions for the gains and the Lime constant...
The strap wrench shown is used to grip the pipe firmly without marring the surface of the pipe. Knowing that the coefficient of static friction is the same for all surfaces of contact, determine the...
Three rods of lengths a = 240 mm, 200mm b = 200mm, and c = 180 mm are welded together to form the component shown. The component is supported by eyebolts at A and C and by a shallow slot cut in a...
Locate the centroid of the plane area shown. -12 in. -6 in Sin 9 in. Quarter elipse
For the frame and loading shown, determine the force acting on member ABC (a) At B, (b) At C. 4 in., 5 in. 60 lb 4 in. [3 in. 3 in. 5 in.
A uniform slender rod of length L is dropped onto rigid supports at A and B. Immediately before striking A the velocity of the rod is v1. Since support B is slightly lower than support A, the rod...
Consider the conditions of Example 11.6, but with the continuous fin arrangement of figure used in lieu of the circular fins of figure. The heat exchanger core is fabricated from aluminum, and the...
A series RLC circuit resonates at 1000 rad/s. If C = 20F, and it is known that the impedance at resonance is 2.4, compute the value of L, the Q of the circuit, and the band width.
Determine the coefficients {h(n)} of a high pass linear phase FIR filter of length M = 4 which has an anti symmetric unit sample response h(n) = -h(M ? 1 ? n) and a frequency response that satisfies...
Consider a Carnot-cycle heat pump having 1 kg of nitrogen gas in a cylinder/piston arrangement. This heat pump operates between reservoirs at 300 K and 400 K. At the beginning of the low-temperature...
An experiment is designed to measure the partition coefficient, K, associated with the transfer of a pharmaceutical product through a polymer material. The partition coefficient is defined as the...
Suppose an OS was designed so that processes could be in any of the following states: a. Running: Currently using the CPU. b. Ready: Waiting for the CPU. c. Blocked for Interrupt: Waiting for an...
Carbon molecular sieves are available in two forms from a Japanese manufacturer: Estimate the surface area of eachform. Form A Form B Pore volume, cm/g Average pore diameter 0.38 0.18 5 2.0p 0 um
Knowing that the radius of each pulley is 125 mm and neglecting friction, determine the internal forces at point K of the frame shown. -255 1.15 in 300 N 1.2 -LS
Knowing that the coefficient of static friction is 0.25 between the rope and the horizontal pipe and 0.20 between the rope and the vertical pipe determine the range of values of P for which...
Aluminum wire with a mass per unit length of 0.049 kg/m is used to form the circle and the straight members of the figure shown. Determine the mass moment of inertia of the assembly with respect to...
Consider the chip on the circuit board of Problem 6.26. To ensure reliable operation over extended periods, the chip temperature should not exceed 85C. Assuming the availability of forced air at Too...
To slow down large prime movers like locomotives a process termed dynamic electric braking is used to switch the traction motor to a generator mode in which mechanical power from the drive wheels is...
A quarter-circular rod of weight W and uniform cross section is supported as shown. Determine the bending moment at point J when = 30 o . r- B
To simulate materials processing under the microgravity conditions of space, a niobium sphere of diameter 3 mm is levitated by an acoustical technique in a vacuum chamber. Initially the sphere is at...
In the circuit in figure v R (t) = 100e ? 400t V for t R(t) for t > 0. 100 AZVR(t) 25 0
Under what conditions is a cascade of mixer-settler units probably the best choice of extraction equipment?
Are complete combustion and theoretical combustion identical? If not, how do they differ?
To supply heated air to a house, a high-efficiency gas furnace burns gaseous propane (C3H8) with a combustion efficiency of 96 percent. Both the fuel and 140 percent theoretical air are supplied to...
A 10-m high cylinder, cross-sectional area 0.1 m2, has a mass less piston at the bottom with water at 20oC on top of it. Air at 300 K, volume 0.3 m3, under the piston is heated so that the piston...
Locate the centroid of the plane area shown. 240 mm 150 mm y =kx?
Heat loss by free convection from a pipe, in Example 14.6-1, would the heat loss be higher or lower if the pipe-surface temperature were 200F and the air temperature were 180F?
A wet, clay brick measuring 2 4 6 in. has an initial uniform moisture content of 12 wt%..At time = 0, the brick is exposed on all sides to .air such that the surface moisture content is maintained...
Wet biomass waste from a food-processing plant is fed to a catalytic reactor, where in an SSSF process it is converted into a low-energy fuel gas suitable for firing the processing plant boilers. The...
Two 6 Ã 4 Ã ½-in. angles are welded together to form the section shown. Determine the moments of inertia and the radii of gyration of the section with respect to the centroidal...
A liquidgas fuel mixture consists of 90 percent octane (C8H18), and 10 percent alcohol (C2H5OH), by moles. This fuel is burned with 200 percent theoretical dry air. Write the balanced reaction...
A recording tape passes over the 20-mm-radius drive drum B and under the idler drum C. Knowing that the coefficients of friction between the tape and the drums are μs = 0.40 and...
Solve Sample Prob. 14.4, assuming that cart A is given an initial horizontal velocity v0 while ball B is at rest.
The steel roll shown weighs 2800 lb, has a centroidal radius of gyration of 6 in., and is lifted by two cables looped around its shaft. Knowing that for each cable TA = 690 lb and TB = 730 lb,...
Two disks, each of mass 5 kg and radius 300 mm, spin as shown at the rate 1 = 1200 rpm about a rod AB of negligible mass which rotates about the horizontal z axis at the rate 2. Determine the maximum...
A cascade control configuration is sometimes used to separate different objectives of feedback control. For instance, first an inner loop can be used to stabilize the process, and then an outer loop...
Argon gas expands from 3.5 MPa and 100°C to 500 kPa in an adiabatic expansion valve. For environment conditions of 100 kPa and 25°C, determine (a) The energy of argon at the inlet, (b) The...
A cylinder fitted with a frictionless piston contains 10 lbm of superheated refrigerant R-134a vapor at 100 lbf/in 2, 300 F. The setup is cooled at constant pressure until the water reaches a quality...
A passive technique for cooling heat-dissipating integrated circuits involves submerging the ICs in a low boiling point dielectric fluid. Vapor generated in cooling the circuits is condensed on...
One of the ways magnetic disk drive manufacturers increase the capacity of a disk is by adding more surfaces. Does this change the device driver interface for the device? If not, why not?
The pressure drop per unit length p/L in smooth pipe flow is known to be a function only of the average velocity V, diameter D, and fluid properties and . The following data were obtained for flow of...
The members of the mechanism are pin connected. If a horizontal force P acts at A, determine the angle for equilibrium. The spring is unstretched when = 90. Units Used: kN = 103 N Given: a = 0.5 m...
Determine the force in members IL, GJ, and HK of the truss shown. 0 ki 05 kip ip 05 kip |0ikp 4.5A 4.5 ft fond -6n60--6R6H--6k--6R
You have analyzed an aqueous ammonia solution and find that it contains 30 wt% NH3. (a) Use Figure 8.5-2 to determine the mass fraction of NH3 in the vapor that would be in equilibrium with this...
Suppose a machines instruction set includes an instruction names swap that operates as follows (as an indivisible instruction): swap (boolean *a, Boolean *b) { boolean t; t = *a; *a =*b; *b = t; }...
Air enters the evaporator section of a window air conditioner at 100 kPa and 27C with a volume flow rate of 6 m3/min. Refrigerant-134a at 120 kPa with a quality of 0.3 enters the evaporator at a rate...
The cover for a 250 Ã 550-mm access hole in an oil storage tank is attached to the outside of the tank with four bolts as shown. Knowing that the density of the oil is 920 kg/m3 and that the...
A constant-volume tank contains a mixture of 1 kmol H2 and 1 kmol O2 at 25C and 1 atm. The contents are ignited. Determine the final temperature and pressure in the tank when the combustion gases are...
Knowing that the radius of each pulley is 125 mm and neglecting friction, determine the internal forces at point J of the frame shown. -255 m 1.35 m 12 D. -1.5 -1
Atmospheric air of 40% relative humidity and temperature T = 300 K is in parallel flow over a series of water-filled trays, with U = 12 m/s. What is the rate at which energy must be supplied to ach...
Two seconds are required to bring the piston rod of an air cylinder to rest; the acceleration record of the piston rod during the 2 s is as shown. Determine by approximate means (a) The initial...
A system consists of three particles A, B, and C. We know that mA = 3 kg, mB = 2 kg, and mC = 4 kg and that the velocities of the particles expressed in m/s are, respectively, vA = 4i + 2j + 2k, vB =...
Heat transfer from condensing vapors. (a) The outer surface of a vertical tube I in. in outside diameter and 1 ft long is maintained at 190F. If this tube is surrounded by saturated steam at I atm,...
Design an op-amp based circuit to produce the function Vo = 5V1 7V2.
Write a shell script to interrogate the operating system to determine the number of processes considered by the short-term scheduler for processor allocation (processes currently ready to run) at any...
A shell-and-tube heat exchanger has one shell pass and four tube passes. The fluid in the tubes enters at 200?C and leaves at 100?C. The temperature of the fluid entering the shell is 20?C and is...
The 4-ft-diameter log (SG 0.80) in Fig P2.94 is 8 ft long into the paper and dams water as shown. Compute the net vertical and horizontal reactions at point C. Los, 2ft Water 2 fel...
Draw the shear and moment diagrams for the beam. -B
Gears A and D are rigidly attached to horizontal shafts that are held by frictionless bearings. Determine (a) The couple 0 M that must be applied to shaft DEF to maintain equilibrium (b) The...
The assembly shown consists of two rods and a rectangular plate BCDE which are welded together. The assembly rotates about the axis AB with a constant angular velocity of 10 rad/s, knowing that the...
Discuss some factors that must be considered in determining the maximum number of multiprogrammed processes for a particular system. You may assume a batch system with the same number of processes as...
A log of burning wood in the fireplace has a surface temperature of 450C. Assume the emissivity is 1 (perfect black body) and find the radiant emission of energy per unit surface area.
Thin film coatings characterized by high resistance to abrasion and fracture may be formed by using micro-scale composite particles in a plasma spraying process. A spherical particle typically...
A 6-lb collar can slide without friction on a vertical rod and is resting in equilibrium on a spring. It is pushed down, compressing the spring 6 in., and released. Knowing that the spring constant...
By using the pre-emphasis filter shown in Figure a and with a voice signal as the modulating wave, and FM transmitter produces a signal that is essentially frequency modulated by the lower audio...
For each of the ternary systems shown in figure, indicate whether: (a) Simple, countercurrent extraction, or (b) Countercurrent extraction with extract reflux, or (c) Countercurrent extraction with...
Two steady flows of air enters a control volume, shown in Fig. P6.80. One is 0.025 kg/s flow at 350 kPa, 150C, state 1, and the other enters at 450 kPa, 15C, both flows with low velocity. A single...
A load of weight 400 N is suspended from a spring and two cords that are attached to blocks of weights 3W and W as shown. Knowing that the constant of the spring is 800 N/m, determine (a) The value...
For the roof truss shown, determine the force in each of the members located to the left of member GH. State whether each member is in tension or compression. -24 m14 m1a1im24 13AN 15AN IAAN LSAN TAS
The inner surface of a plane wall is insulated while the outer surface is exposed to an airstream at T . The wall is at a uniform temperature corresponding to that of the airstream. Suddenly, a...
At the bottom of a very large vacuum chamber whose walls are at 300 K, a black panel 0.1 m in diameter is maintained at 77 K. To reduce the heat gain to this panel, a radiation shield of the same...
A mass of 12 kg of saturated refrigerant-134a vapor is contained in a piston - cylinder device at 240 kPa. Now 300 kJ of heat is transferred to the refrigerant at constant pressure while a 110-V...
Let the real discrete-time signal x[n] with Fourier transform X(e j? ) be the input to a system with the output defined by (a) Sketch the discrete-time signal s[n] = 1 + cos(? n) and its...
Cocaine metabolism in rats can be studied by injecting the drug and periodically withdrawing blood to measure levels of metabolites by HPLC-mass spectrometry. For quantitative analysis, isotopically...
The column is used to support the upper floor. If the force F is removed from the handle of the jack, determine if the screw is self-locking.. The square-threaded screw on the jack has a coefficient...
For flow over a flat plate of length L, the local heat transfer coefficient hx is known to vary as x-1/2, where x is the distance from the leading edge of the plate. What is the ratio of the average...
Argue for conditions under which the access control method id superior to the capability list approach for implementing the access matrix.
Consider the liquid storage system of Exercise 15.4 but suppose that the band valve for qs is replaced by a pump and a control valve (cf. Fig). Repeat parts (a) through (c) of Exercise 15.4 for the...
When is a weak acid weak and when is a weak acid strong? Show that the weak acid HA will be 92% dissociated when dissolved in water if the formal concentration is one-tenth of Ka (F = Ka/10). Show...
For the tree of Prob. 2.73, knowing that the tension in cable AB is 760 lb and that the resultant of the forces exerted at A by cables AB and AC lies in the yz plane, determine (a) The tension in AC,...
Two steel pipes ABCD and EBF are welded together at B to form the boom shown. The boom is held by a ball-and-socket joint at D and by two cables EG and ICFH; cable ICFH passes around frictionless...
Determine the force in each member of the fan roof truss shown. State whether each member is in tension or compression. 1.5 m, 15 m 1.5 m 15 m 15 m, 1.5 m 4kN 14 kN 4 kN 4 kN 14 kN 2 KN 2 KN
For the frame and loading shown, determine the components of all forces acting on member GBEH. 20- 150 FoooN 300 Dimesis in m
Determine the force in each of the members located to the left of member FG for the scissor roof truss shown. State whether each member is in tension or compression. 05 kip I kip 3 it 3 ft 3 it 3 ft...
Hot water for an industrial washing operation is produced by recovering heat from the flue gases of a furnace. A cross-flow heat exchanger is used, with the gases passing over the tubes and the water...
A 1-m3 tank is filled with a gas at room temperature 20C and pressure 100 kPa. How much mass is there if the gas is a) air, b) neon or c) propane?
A small, high-speed turbine operating on compressed air produces a power output of 0.1 hp. The inlet state is 60 lbf/in.2, 120 F, and the exit state is 14.7 lbf/in.2, 20 F. Assuming the velocities to...
Consider the FIR filter y(n) = x(n) + x(n 4) (a) Compute and sketch its magnitude and phase response. (b) Compute its response to the input x(n) = cos /2n + cos /4n - < n < (c) Explain the results...
Locate the center of mass of the (x, y, z) homogeneous blockassembly. 250 mm 200 mm 150 mm 100 mm 150 mm 150 mm
Air enters an adiabatic compressor at 100 kPa and 17C at a rate of 2.4 m3/s, and it exits at 257C. The compressor has an isentropic efficiency of 84 percent. Neglecting the changes in kinetic and...
Three SSSF flows are mixed in an adiabatic chamber at 150 kPa. Flow one is 2 kg/s of O2 at 340 K, flow two is 4 kg/s of N2 at 280 K and flow three is 3 kg/s of CO2 at 310 K. All flows are at 150 kPa...
A proposed energy storage mechanism consists of an N-turn coil wound around a large nonmagnetic (? = ?0) toroidal form as shown in Figure. As can be seen from the figure, the toroidal form has a...
Consider an LTI system with impulse response h(n) = (1/3)|n| (a) Determine and sketch the magnitude and phase response H()| and < H (), respectively. (b) Determine and sketch the magnitude and phase...
A large slab of concrete, 5 8 0.3 m is used as a thermal storage mass in a solar-heated house. If the slab cools overnight from 23C to 18C in an 18C house, what is the net entropy change associated...
A 12 fluid ounce glass, 3 inches in diameter, sits on the edge of a merry-goround 8 ft in diameter, rotating at 12 r/min. How full can the glass be before it spills? 12 fl. oz. Mermry-go-round 212...
Given B = x (z - 3y) + y(2x -3z) - z(x + y), find a unit vector parallel to B at point P(1, 0, -1)
A gas turbine with air as the working fluid has two ideal turbine sections, as shown in Fig. P11.53, the first of which drives the ideal compressor, with the second producing the power output. The...
Two bolts A and B are tightened by applying the forces and couple shown. Replace the two wrenches with a single equivalent wrench and determine (a) The resultant R, (b) The pitch of the single...
To the left of point B, the long cable ABDE rests on the rough horizontal surface shown. Knowing that the weight per unit length of the cable is 1.5 lb/ft, determine the force F when a = 10.8 ft. DE...