The press shown is used to emboss a small seal at E. Knowing that the vertical component of the force exerted on the seal must be 240 lb, determine (a) The required vertical force P, (b) The...

Turbulent flow in horizontal pipes, a fluid is flowing with a mass flow rate w in a smooth horizontal pipe of length L and diameter D as the result of a pressure difference P0 - PL. The flow is known...

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...

Porous particles of activated alumina have a BET surface area of 310 m2/g, a particle porosity of 0.48, and a particle density of 1.30 g/cm3. Determine: (a) Specific pore volume in cm3/g, (b) True...

If the mass of the counterweight at A is 6500 kg, determine the force the gate exerts on the smooth stop at C. The gate is hinged at B and is 1-m wide. The density of water is ? w = 1 Mg/m 3 . 2 m m-...

An air-standard cycle is executed in a closed system with 0.004 kg of air and consists of the following three processes: 1-2 Isentropic compression from 100 kPa and 27C to 1 MPa 2-3 P = constant heat...

In the production of chlorobenzenes by chlorination of benzene, two close-boiling isomers, para-dichlorobenzene (P) and ortho-dichlorobenzene (O), are separated by distillation. The feed to the...

Consider the feedback control system in figure, and the following transfer functions: (a) Plot a Bode diagram for the open-loop transfer function. (b) Calculate the value of K that provides a phase...

Design the spring of Ex. 105 using the Gerber fatigue-failure criterion.

For a rectangular weld-bead track resisting bending, develop the necessary equations to treat cases of vertical welds, horizontal welds, and weld-all-around patterns with depth d and width b and...

The axial forces act on the shaft as shown. Determine the internal normal forces at points A and B. Given: F1 = 20 lb F2 = 50 lb F3 = 10 lb F2 F2 F, Fi F1 F1 Fi NA Ng

In Example 3.5, an expression was derived for the critical insulation radius of an insulated, cylindrical tube. Derive the expression that would be appropriate for an insulated sphere.

Consider the packed bed operating conditions of Problem 5.12, but with Pyrex (p = 2225 kg/m3 c = 835 J/kg K. k = 1.4 W/m K) used instead of aluminum. How long does it take a sphere near the inlet...

Consider a simple ideal Brayton cycle with air as the working fluid. The pressure ratio of the cycle is 6, and the minimum and maximum temperatures are 300 and 1300 K, respectively. Now the pressure...

A thin-walled tube of 20-mm diameter passes hot fluid at a mean temperature of 45C in an experimental flow loop. The tube is mounted horizontally in quiescent air at a temperature of 15C. To satisfy...

In a balanced three-phase wye-wye system, the source is an abc-sequence set of voltages and Van = 120 < 50o V rms. The load voltage on the a phase is 110 < 50o V rms, and the load impedance is 16 +...

A rigid container with volume 200 L is divided into two equal volumes by a partition, shown in Fig. P8.104. Both sides contain nitrogen, one side is at 2 MPa, 200C, and the other at 200 kPa, 100C....

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...

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...

The 7-kg block A is released from rest in the position shown. Neglecting the effect of friction and the masses of the pulleys, determine the velocity of the block after it has moved 0.6 m up the...

An extremely effective method of cooling high-power density silicon chips involves etching micro-channels, in the back (non-circuit) surface of the chip. The channels are covered with a silicon cap...

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...

A 64-lb block is attached to a spring of constant 1 kip/k = /ft and can move without friction in a vertical slot as shown. It is acted upon by a periodic force of magnitude P = P m sin f t where f...

(a) For the distillation column shown in Figure, determine the number of independent design variables.(b) It is suggested that a feed consisting of 30% A, 20% B, and 50% C, all in moles, at 37.8oC...

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...

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...

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...

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...

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...

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.

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....

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, 20C, 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

A 2-kg block A can slide without friction down a slot in a 10-kg block B which can slide without friction on a horizontal surface. Both blocks are at rest when block A is released in the position...

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...

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...

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...

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

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...

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...

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...

For the car of Prob. 16.124, determine the smallest constant acceleration that the driver can maintain if the door is to close and latch, knowing that as the door hits the frame its angular velocity...

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...

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...

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...

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 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...

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 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...

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....

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 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...

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...

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, 60C. The spring...

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...

For the plate of Problem 2.89, determine the tension in cables AB and AD knowing that the tension if cable AC is 27 lb and that the resultant of the forces exerted by the three cables at A must be...

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...

Can a system have a higher second-law efficiency than the first-law efficiency during a process? Give examples.

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...

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 particle of mass m is projected from point A with an initial velocity v0 perpendicular to OA and moves under a central force F along an elliptic path defined by the equation r = r0/(2 ?? cos)....

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...

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...

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...

Explain why a file system that supports indexed sequential files cannot be expected to have the same performance level as pure sequentially accessed files.

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 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...

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 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...

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...

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...

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,...

In the absence of compressed liquid tables, how is the specific volume of a compressed liquid at a given P and T determined?

This problem explores the effect of interchanging the order of two operations on a signal, namely, sampling and performing a memoryless nonlinear operation. (a) Consider the two signal-processing...

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...

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...

A combination air cooler and dehumidification unit receives outside ambient air at 35C, 100 kPa, 90% relative humidity. The moist air is first cooled to a low temperature T2 to condense the...

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...

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...

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...

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...

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 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...

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...

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 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...

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...

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...

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,...

What is the purpose of a spheroidizing heat treatment? On what classes of alloys is it normally used?

If the drain current for the 2N3797 MOSFET of Fig. 6.34 is 8 mA, what is the maximum permissible value of VDS utilizing the maximum power rating?

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...