One hundred kilogram-moles per hour of a saturated liquid mixture of 12 mol% ethyl alcohol in water is distilled continuously by direct steam at 1 atm introduced directly to the bottom plate. The...
Determine whether refrigerant R-22 in each of the following states is a compressed liquid, a superheated vapor, or a mixture of saturated liquid and vapor.
An adiabatic constant-volume tank contains a mixture of 1 kmol of hydrogen (H2) gas and the stoichiometric amount of air at 25C and 1 atm. The contents of the tank are now ignited. Assuming complete...
We wish to obtain a supply of cold helium gas by applying the following technique. Helium contained in a cylinder at ambient conditions, 100 kPa, 20C, is compressed in a reversible isothermal...
For the beam and loading shown, (a) Draw the shear and bending-moment diagrams, (b) Determine the maximum absolute values of the shear and bending moment. 4 kN/m B -5 m 2 m 8 kN S kN
Consider two very large parallel plates with diffuse, gray surfaces. Determine the irradiation and radiosity for the upper plate. What is the radiosity for the lower plate? What is the net radiation...
Using the data represented in figure, specify equations relating tensile strength and Brinell hardness for brass and nodular cast iron, similar to Equations 6.20a and 6.20b for steels. 20 30 40 50...
The figure shows a connection that employs three SAE grade 4 bolts. The tensile shear load on the joint is 5000 lbf. The members are cold-drawn bars of AISI 1020 steel. Find the factor of safety for...
The ascorbic acid concentration of five different brands of orange juice was measured. Six replicate samples of each brand were analyzed. The following partial ANOVA table was obtained. (a) Fill in...
It is known that for a given area Iy = 300 in4 and Ixy = 125 in4, where the x and y axes are rectangular centroidal axes. If the axis corresponding to the maximum product of inertia is obtained by...
Figure 11.5 shows four cases for the flow over the same airfoil wherein M is progressively increased from 0.3 to MC = 0.61. Have you wondered where the numbers on Fig. 11.5 came from? Here is your...
A spiral-wound, nonporous cellulose acetate membrane separator is to be used to separate a gas containing H2, CH4, and C2H6. The permeate will be 95 mol% pure H2 and will contain no ethane. The...
A re-cooperator is a heat exchanger that heats the air used in a combustion process by extracting energy from the products of combustion (the flue gas). Consider using a single-pass, cross-flow heat...
How many device operations (for example, disk sector read () and write () operations) are required to add a released node to free list, where the free list is implemented with the linked-list...
A slab of dry wood of 4-in. thickness and sealed edges is exposed to air of 40% relative humidity. Assuming that the two unsealed faces of the wood immediately jump to an equilibrium moisture content...
A parallel-polarized plane wave is incident from air at an angle thetai = 30_ onto a pair of dielectric layers as shown in the figure. (a) Determine the angles of transmission theta2, theta3, and...
Consider the conditions of Problem 5.27. In addition to treating heat transfer by convection directly from the chip to the coolant, a more realistic analysis would account for indirect transfer from...
In a game of pool, ball A is traveling with a velocity v0 when it strikes balls B and C which are at rest and aligned as shown. Knowing that after the collision the three balls move in the directions...
A slender 5-kg bar AB of length l = 0.6 m is connected to two collars, each of mass 2.5 kg. Collar A is attached to a spring of constant k = 1.5kN/m and can slide on a horizontal rod, while collar B...
Determine the product of inertia for the beam's cross-sectional area with respect to the u and v axes. Given: a = 150 mm b = 200 mm t = 20 mm = 20 deg
Explain why the separation of a stream containing 10 wt% acetic acid in water might be more economical by liquid-liquid extraction with ethyl acetate than by distillation.
Your company is having problems with the Iced stream to a reactor. The feed must be kept at a constant mass flaw rate ( w ) even though the supply from the upstream process unit varies with time, w i...
Can a system have a higher second-law efficiency than the first-law efficiency during a process? Give examples.
Consider a refrigerator that operates on the vapor compression refrigeration cycle with R-134a as the working fluid. The refrigerant enters the compressor as saturated vapor at 160 kPa, and exits at...
A gas mixture consists of 5 kg of O2, 8 kg of N2, and 10 kg of CO2. Determine (a) The mass fraction of each component, (b) The mole fraction of each component, and (c) The average molar mass and gas...
A cylinder fitted with a piston restrained by a linear spring has a cross-sectional area of 0.05 m2 and initial volume of 20 L. The cylinder contains ammonia at 1 MPa, 60C. The spring...
A force P of magnitude 160 N is applied to a mans hand as shown. Replace P with an equivalent force-couple system (a) At the elbow B, (b) At the shoulder C. 305 m 15 50 355
For the beam and loading shown, (a) Draw the shear and bending-moment diagrams, (b) Determine the location and magnitude of the maximum absolute value of the bending moment. -2 m -2 m - - 20 kN/m 20...
Heating of a wall {constant wall heat flux, A very thick solid wall is initially at the temperature T 0 . At time t = 0, a constant heat flux q 0 is applied to one surface of the wall (at y = 0), and...
A 2 mol% NH3-in-air mixture at 68F and 1 atm is to be scrubbed with water in a tower packed with 1.5-in, ceramic Berl saddles. The inlet water mass velocity will be 2400 lbk-ft2, and the inlet gas...
Air at 20°C and 1 atm enters a 40-cmsquare duct as in Fig. P7.7. Using the displacement thickness concept of Fig. 7.4, estimate (a) The mean velocity and (b) The mean pressure in the core of the...
Consider the symmetrical section of the flow channel of Problem 4.46, with the prescribed values of q, k, T ,i , T ,0 , h i and h o . Use the finite-element method of FEHT to obtain the following...
A sphere of radius r and weight W with an initial clockwise angular velocity 0 is placed in the corner formed by the floor and a vertical wall. Denoting by k the coefficient of kinetic friction at A...
Explain why a file system that supports indexed sequential files cannot be expected to have the same performance level as pure sequentially accessed files.
Steam having a quality of 98% at a pressure of 1.37 105 N/m2 is flowing at a velocity of 1 m/s through a steel pipe of 2.7 cm OD and 2.1 cm ID. The heat transfer coefficient at the inner surface,...
A combination air cooler and dehumidification unit receives outside ambient air at 35C, 100 kPa, 90% relative humidity. The moist air is first cooled to a low temperature T2 to condense the...
As shown in Fig. P2.10, an elastic exercise band is grasped and then is stretched. Knowing that the tension in portion DE of the band is 70 N, determine, using trigonometry, (a) The magnitude and...
An FM signal with modulation index = 1 is transmitted an ideal band-pass filter with mid-band frequency c and bandwidth 5 m , where c is the carrier frequency and m is the frequency of the...
Exhaust gas from a furnace is used to preheat the combustion air supplied to the furnace burners. The gas, which has a flow rate of 15 kg/s and an inlet temperature of 1100 K, passes through a bundle...
A mixture of benzene and dichloroethane is used to test the efficiency of a packed column that contains 10 ft of packing and operates adiabatically at atmospheric pressure. The liquid is charged to...
Calcium-carbonate precipitate can be produced by the reaction of an aqueous solution of sodium carbonate and calcium oxide. The by-product is aqueous sodium hydroxide. Following decantation, the...
A piston/cylinder of total 1 kg steel contains 0.5 kg ammonia at 1600 kPa both masses at 120oC. Some stops are placed so a minimum volume is 0.02 m3, shown in Fig. P8.85. Now the whole system is...
In the absence of compressed liquid tables, how is the specific volume of a compressed liquid at a given P and T determined?
A heat pump with a COP of 3.2 is used to heat a perfectly sealed house (no air leaks). The entire mass within the house (air, furniture, etc.) is equivalent to 1200 kg of air. When running, the heat...
The required force to be exerted at A by lever ABC is 3 lb. Knowing that α =30° and that the spring has been stretched 1.2 in., determine (a) The constant k of the spring (b) The reaction...
A rewritable optical disc (DVD) is formed by sandwiching a 15-nm-thick binary compound storage material between two I-mm-thick polycarbonate sheets. Data are written to the opaque storage medium by...
A one wire of diameter D is positioned across a passage to determine flow velocity from heat transfer characteristics. Current is passed through the wire to heat it, and the heat is dissipated to the...
Various amounts of activated carbon were added to a fixed amount of raw cane sugar solution (48 wt% sucrose in water) at 80?C. A colorimeter was used to measure the color of the solutions. R, which...
The values of E b /N 0 required to realize an average probability or symbol error P a = 10 -4 using coherent binary PSK and coherent FSK (conventional) systems are equal to 7.2 and 13.5,...
Suppose a file system is based on the index allocation strategy for managing blocks. Assume each file has a directory entry giving the filename, first index block, and the length of the file. The...
Consider a reflection grating operating with an incident angle of 40 in Figure 19-7. (a) How many lines per centimeter should be etched in the grating if the first-order diffraction angle for 600-nm...
A two-dimensional incompressible flow field is defined by the velocity components where V and L are constants, if they exist, find the stream function and velocity potential.
The uniform hoop of weight W is suspended from the peg at A and a horizontal force P is slowly applied at B. If the hoop begins to slip at A when the angle is , determine the coefficient of static...
A piece of thin, uniform sheet metal is cut to form the machine component shown. Denoting the mass of the component by m, determine its moment of inertia with respect to (a) The x axis, (b) The y...
Flow through a sudden enlargement (Fig. 7.6-1). A fluid is flowing through a sudden enlargement, in which the initial and final diameters are D 1 and D 2 respectively. At what ratio D 2 /D 1 will the...
Consider the DSB-SC signal s (t) = A c cos (2 c t) m (t), where A c cos (2 c t) is the carrier wave and m (t) is the message signal. This modulated signal is applied to a square-law device...
The gas space above the water in a closed storage tank contains nitrogen at 80 F, 15 lbf/in.2 Total tank volume is 150 ft3 and there is 1000 lbm of water at 80 F. An additional 1000 lbm water is now...
Saturated steam vapor is contained in a pistoncylinder device. While heat is added to the steam, the piston is held stationary, and the pressure and temperature become 1.2 MPa and 700C, respectively....
Consider the turbocharger of an internal combustion engine. The exhaust gases enter the turbine at 450°C at a rate of 0.02 kg/s and leave at 400°C. Air enters the compressor at 70°C and...
Reconsider Problem 934. Using EES (or other) software, study the effect of varying the compression ratio from 5 to 10. Plot the net work output and thermal efficiency as a function of the compression...
A mixture of 60 percent carbon dioxide and 40 percent methane on a mole basis expands through a turbine from 1600 K and 800 kPa to 100 kPa. The volume flow rate at the turbine entrance is 10 L/s....
Consider a simple ideal Rankine cycle using water at a supercritical pressure. Such a cycle has a potential advantage of minimizing local temperature differences between the fluids in the steam...
A vertical slab of Woods metal is joined to a substrate on one surface and is melted as it is uniformly irradiated by a laser source on the opposite surface. The metal is initially at its fusion...
A plate 1 m by 1 m, inclined at an angle of 45, is exposed to a net radiation heat flux of 300 W/m 2 at its bottom surface. If the top surface of the plate is well insulated, estimate the temperature...
Dry air at 35C and a velocity of 15 m/s flows over a long cylinder of 20-mm diameter, the cylinder is covered with a thin porous coating saturated with water, and an imbedded electrical heater...
Dry air at 35C and a velocity of 10 m/s flows over a thin-walled tube of 20-mm diameter and 200-mm length, having a fibrous coating that is water-saturated To maintain an approximately uniform...
A wire of uniform cross section having a mass of 1.2 kg/m is used to form the wire figure shown, which is suspended from cord AD. Knowing that an impulse se Ft = (5.4 N??s)j is applied to the wire...
There are two ways of detecting an MSK signal. One way is to use a coherent receiver to take full account of the phase information content of the MSK signal. Another way is to use a non-coherent...
Frequency response data for a process are tabulated below. These results were obtained by introducing a sinusoidal change in the controller output (under manual control) and recording the measured...
A 15-ft3 rigid tank contains a saturated mixture of refrigerant-134a at 50 psia. If the saturated liquid occupies 20 percent of the volume, determine the quality and the total mass of the refrigerant...
The beam AB supports the uniformly distributed load of 1000 N/m and two unknown forces P and Q. Knowing that it has been experimentally determined that the bending moment is − 395 N m at A and...
A piece of sheet metal is bent into the shape shown and is acted upon by three forces. Replace the three forces with an equivalent wrench and determine (a) The magnitude and direction of the...
The linkage ABD is formed by connecting two 4-kg bars and a collar of negligible mass. The motion of the linkage is controlled by the force P applied to the collar. Knowing that at the instant shown...
A uniformly loaded square crate is released from rest with its corner D directly above A; it rotates about A until its corner B strikes the floor, and then rotates about B. The floor is sufficiently...
Potential flow past a wedge of half angle leads to an important application of laminar-boundary-layer theory called the Falkner-Skan flows [Ref. 15 of Chap. 8, pp. 242247]. Let x denote distance...
The dry- and wet-bulb temperatures of atmospheric air at 95 kPa are 25 and 17C, respectively. Determine (a) The specific humidity, (b) The relative humidity, and (c) The enthalpy of the air, in kJ/kg...
To approximate an actual spark-ignition engine consider an air-standard Otto cycle that has a heat addition of 1800 kJ/kg of air, a compression ratio of 7, and a pressure and temperature at the...
A refrigerator using R-134a is located in a 20C room. Consider the cycle to be ideal, except that the compressor is neither adiabatic nor reversible. Saturated vapor at -20C enters the compressor,...
A major contributor to product defects in electronic modules relates to stresses induced during thermal cycling (intermittent heating and cooling). For example, in circuit cards having active and...
A plane contains the vectors A and B. Determine the unit vector normal to the plane when A and B are equal to, respectively, (a) 4i 2j + 3k and 2i + 6j 5k, (b) 7i + j 4k and 6i 3k + 2k.
The 6-in.-radius drum rolls without slipping on a belt that moves to the left with a constant velocity of 12 in/s. At an instant when the velocity and acceleration of the center D of the drum are as...
Use tabulated specific enthalpies from Tables B.8 and 8.9 to calculate A for the following processes, all taking place at low pressures: (a) N2 (25C) b N2 (700C) (c) CO2 (300C) CO2 (1250C) (b) H2...
A common industrial application of dc series motors is in crane and hoist drives. This problem relates to the computation of selected motor performance characteristics for such a drive. The specific...
In a hypothetical Linux system, each virtual address is 32 bits with a 10-bit page size, 256-entry page table, 32l-entray page middle directory, and 256-entry page directory. Using the Linux model...
A liquid mixture of 27 wt% acetone and 73 wt% water is to be separated at 25 o C into a raffinate and extract by multistage, steady-state, countercurrent liquid-liquid extraction with a solvent of...
Determine the moment of the force F about point A as a function of ?. Plot the results of M (ordinate) versus ? (abscissa) for 0? ? ? ? 180?. F= 400 N -3 m-
A 1.2 2.4 Ã m sheet of plywood having a mass of 18 kg has been temporarily propped against column CD. It rests at A and B on small wooden blocks and against protruding nails. Neglecting...
Figure shows the encoder for a rate r = 1/2, constraint length K = 4 convolutional code. Determine the encoder output produced by the message sequence 10111.... Modulo-2 adder Output Input o Flip-flop
A two-fluid heat exchanger has inlet and outlet temperatures of 65 and 40C for the hot fluid and 15 and 30C for the cold fluid. Can you tell whether this exchanger is operating under counter flow or...
Hot and cold liquids are mixed at the junction of two pipes. The temperature of the resulting mixture is to be controlled using a control valve on the hot stream. The dynamics of the mixing process,...
The shield of a nuclear reactor can be idealized by a large 10 in. thick flat plate having a thermal conductivity of 2 Btu/(h ft ?F). Radiation from the interior of the reactor penetrates the shield...
The steel shaft shown in the figure is subjected to a torque of 50 lbf-in applied at point A. Find the torque reactions at O and B | 50 lt f-in -india. 0 6 in
Propane and air are supplied to an internal combustion engine such that the air-fuel ratio is 16:1 when the pressure is 95 kPa and the temperature is 30C. The compression ratio of the engine is...
Two very long (in the direction normal to the page) bars having the prescribed initial temperature distributions are to be soldered together. At time t = 0, the m = 3 face of the copper (pure) bar...
What is the purpose of a spheroidizing heat treatment? On what classes of alloys is it normally used?
One million pound-moles per day of a gas of the following composition is to be absorbed by n-heptane at -30?F and 550 psia in an absorber having 10 theoretical stages so as to absorb 50% of the...
Barium carbonate, which is essentially water insoluble, is to be made by precipitation from an aqueous solution containing 120,000 kg/day of water and 40,000 kg/day of barium sulfide, with the...
The top surface (0.5 m x 0.5 m) of an oven is 60C for a particular operating condition when the room air is 23C. To reduce heat loss from the oven and to minimize bum hazard, it is proposed to create...
In Linux, shared libraries perform many operations central to the operating system. What is the advantage of keeping this functionality out of the kernel? Are there any drawbacks? Explain your answer.
Two 10-lb disks and a small motor are mounted on a 15-lb rectangular platform which is free to rotate about a central vertical spindle. The normal operating speed of the motor is 180 rpm. If the...