Figure shows a PCM signal in which the amplitude levels of +1 volt and ?1 are used to represent binary symbols 1 and 0, respectively. The code word used consists of three bits. Find the sampled...
For the conditions of Exercise 8.30, estimate: (a) Sauter mean drop size, (b) Range of drop sizes, and (c) Interfacial area of the two-phase liquid-liquid emulsion.
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 coefficient of static friction between the hoop and peg is s, determine if it is...
The acceleration of a particle is defined by the relation a = 0.4 v, where a is expressed in mm/s2 and v in mm/s. Knowing that at t = 0 the velocity is 75 mm/s, determine (a) The distance the...
A cylindrical piece of steel 75 mm (3 in.) in diameter is to be austenitized and quenched such that a minimum hardness of 40 HRC is to be produced throughout the entire piece. Of the alloys 8660,...
Acetic acid is to be extracted from a dilute aqueous solution with isopropyl ether at 25oC in a countercurrent cascade of mixer-settler units. In one of the units, the following conditions apply:...
The state of stress at a point is x = 6, y = 18, z = 12, xy = 9, yz = 6, and zx = 15 kpsi. Determine the principal stresses, draw a complete Mohrs three-circle diagram, labeling all points of...
A bevel-gear shaft mounted on two 40-mm 02-series ball bearings is driven at 1720 rev/min by a motor connected through a flexible coupling. The figure shows the shaft, the gear, and the bearings. The...
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...
Repeat Prob. 285 assuming the electricity is produced by a power plant that burns coal. The average production of CO2 in this case is 1.1 kg per kWh.
A vertical steel tube carries water at a pressure of 10 bars. Saturated liquid water is pumped into the D = 0.1 m diameter tube at its bottom end (x = 0) with a mean velocity of unt = 0.05 m/s. The...
Suppose that the distillation column shown in figure has been designed to separate a methanol-water mixture that is .50% methanol (MeOH). This high purity column has a large number of trays and a...
A 1m x 1 m square solar collector is placed on the roof of a house. The collector receives a solar radiation flux of 800 W/m2. Assuming that the surroundings act as a blackbody at an effective sky...
A stream of warm air with a dry-bulb temperature of 40C and a wet-bulb temperature of 32C is mixed adiabatically with a stream of saturated cool air at 18C. The dry air mass flow rates of the warm...
Saturated steam enters a convergingdiverging nozzle at 3.0 MPa, 5 percent moisture, and negligible velocity, and it exits at 1.2 MPa. For a nozzle exit area of 16 cm2, determine the throat area, exit...
A 20-kg roller of diameter 200 mm, which is to be used on a tile floor, is resting directly on the sub flooring as shown. Knowing that the thickness of each tile is 8 mm, determine the force P...
The uniform rod AB of mass m and length L is attached to two blocks which slide freely in circular slots as shown. Knowing that 45 α = °, determine (a) The largest value of L for which the...
Two parallel members ABC and DEF are placed between two walls and are connected by link BE. Neglecting friction between the members and the walls, determine the range of values of the distance a for...
A uniform sphere of radius r rolls down the incline shown without slipping. It hits a horizontal surface and, after slipping for a while, it starts rolling again. Assuming that the sphere does not...
Consider the distillation column shown in Figure. It would be reasonable to control the liquid level in the reflux drum, hD, by manipulating either reflux flow rate, R, or distillate flow rate, D....
An indoor pool evaporates 1.512 kg/h of water, which is removed by a dehumidifier to maintain 21C, 70% in the room. The dehumidifier, shown in Fig P12.71, is a...
A stream of ammonia enters a steady flow device at 100 kPa, 50C, at the rate of 1 kg/s. Two streams exit the device at equal mass flow rates; one is at 200 kPa, 50C, and the other as...
The sides and the base of a punch bowl are of uniform thickness t. If t <
The system shown, consisting of a 20-kg collar A and a 10-kg counterweight B, is at rest when a constant 500-N force is applied to collar A.(a) Determine the velocity of A just before it hits the...
When operated from a 230-V dc supply, a dc series motor operates at 975 r/min with a line current of 90 A. Its armature-circuit resistance is 0.11 and its series-field resistance is 0.08. Due to...
Air at 1 atm and 100C flows through a straight, 5-cm-diameter circular tube, cast from naphthalene, at a Reynolds number of 1,500. Air entering the tube has an established laminar-flow velocity...
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...
The exit composition C3 of the blending system in Fig is controlled using a digital feedback controller. The exit stream is automatically sampled every minute, and the composition measurement is sent...
At the equator, where the sun at noon is approximately overhead, a near optimum orientation for a flat plate solar hot water heater is in the horizontal position. Suppose a 4 m 4 m solar collector...
How many moles of C2H5OH are needed to generate 106.7 g of H2O? C2H5OH() + 3O2(g) ( 2CO2(g) + 3H2O()
Air at 500 kPa and 400 K enters an adiabatic nozzle at a velocity of 30 m/s and leaves at 300 kPa and 350 K. Using variable specific heats, determine (a) The isentropic efficiency, (b) The exit...
Two packages are placed on an incline as shown. The coefficients of friction are s = 0.30 and k = 0.25 between the incline and package A, and s = 0.20 and k = 0.15 between the incline and package B....
Draw the shear and moment diagrams for the cantilevered beam. 1000 Ib 800 ib ft ft
Describe a new read function, xRead ( ) , along with other functions that could enable one to write programs in a high level language such that the application can continue processing after the xRead...
A desublimation unit of the heat-exchanger type is to be sized for the recovery of 200 kg/h of benzoic acid (BA) from a gas stream containing 0.8 mol% BA and 99.2 mol% N 2 . The gas enters the unit...
Consider the evaporation of liquid A into a column containing a binary gas mixture of A and B. Species B cannot be absorbed in liquid A and the boundary conditions are the same as in Section 14.2.2....
For the portion of a machine shown, the 100-mm-diameter pulley A and wheel B are fixed to a shaft supported by bearings at C and D. The spring of constant 366 N/m is unstretched when θ = 0, and...
Each of the frames shown consists of two L-shaped members connected by two rigid links. For each frame, determine the reactions at the supports and indicate whether the frame is rigid.
The absorber plate and the adjoining cover plate of a flat-plate solar collector are at 70 and 35C, respectively, and are separated by an air space of 0.05 m. What is the rate of free convection heat...
A 25 mol% mixture of acetone (A) in water (W) is to be separated by distillation at an average pressure of 130 kPa into a distillate containing 95 mol% acetone and a bottoms containing 2 mol%...
A 10-L rigid tank contains R-22 at 10C, 80% quality. A 10-A electric current (from a 6-V battery) is passed through a resistor inside the tank for 10 min, after which the R-22 temperature is 40C....
Bags of grass seed are stored on a wooden plank as shown. To move the plank, a 9° wedge is driven under end A. Knowing that the weight of the grass seed can be represented by the distributed load...
Shown is the cross section of an idler roller. Determine its mass moment of inertia and its radius of gyration with respect to the axis AA². (The density of bronze is 8580 kg/m3; of aluminum,...
Show that for an axisymmetrical body under no force, the rates of precession and spin can be expressed, respectively, as = HG/I and where HG is the constant value of the angular momentum of the...
A furnace with an aperture of 20-mm diameter and emissive power of 3.72 x 105 W/m2 is used to calibrate a heat flux gage having a sensitive area of 1.6 x 10-5 m2. (a) At what distance, measured along...
Suppose a file system is organized like the DOS file system and the device index contains 64K pointers. Explain how the file manager could be designed to use the 64K pointers to reference every...
A feedback control system has the open-loop transfer function, GOL(s) = 0.5Kce3s / (10s + 1). Determine the values of Kc for which the closed-loop system is stable using two approaches: (a) An...
The top of a 12 in. I-beam is maintained at a temperature of 500?F, while the bottom is at 200?F. The thickness of the web is 1/2 in. Air at 500?F is blowing along the side of the beam so that h = 7...
Andy and Wendy both wear glasses. On a cold winter day, Andy comes from the cold outside and enters the warm house while Wendy leaves the house and goes outside. Whose glasses are more likely to be...
A lopping pruner is used to cut a small branch at F. Handles AD and BE pivot about bolt B and blade AC pivots about fixed bolt A while bolt C can slide freely in the slot of handle BE. Determine the...
Consider a vertical, single-pane window of equivalent width and height (W = L = 1m). The interior surface is exposed to the air and walls of a room, which are each at 18C. Under cold ambient...
A fuel mixture having a molar analysis of 65% CH4, 25% C2H6, 10% N2 is supplied to a furnace where it burns completely with 120% of theoretical air. Determine. (a) The air-fuel ratio on a mass basis....
Show that the energy (power) of a real-valued energy (power) signal is equal to the sum of the energies (powders) of its even and odd components.
The following performance data have been obtained for a distillation tower separating a 50/50 by weight percent mixture of methanol and water: Feed rate = 45,438 lb/h. Feed condition = bubble-point...
Draw the shear and moment diagrams for thebeam 50 Ib/ft 200 lb ft C| 9 ft -4 ft
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...
A long 1.2 m OD pipeline carrying oil is to be installed in Alaska. To prevent the oil from becoming too viscous for pumping, the pipeline is buried 3 m below ground. The oil is also heated...
When 25.00 mL of unknown were passed through a Jones reductor, molybdate ion (MoO 2- 4 ) was converted into Mo 3+ . The filtrate required 16.43 mL of 0.010 33 M KMnO 4 to reach the purple end point....
Knowing that portions AC and BC of cable ACB must be equal, determine the shortest length of cable which can be used to support the load shown if the tension in the cable is not to exceed 725 N....
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...
When the power to an electric motor is turned on the motor reaches its rated speed of 2400 rpm in 4s, and when the power is turned off the motor coasts to rest in 40s. Assuming uniformly accelerated...
The assembly shown consists of two pieces of sheet aluminum of uniform thickness and total mass 1.6 kg welded to a light axle supported by bearings A and B. Knowing that the assembly rotates with an...
The constant-speed magnetization curve for a 25-kW, 250-V dc machine at a speed of 1200 r/min is shown in Figure. This machine is separately excited and has an armature resistance of 0.14?. This...
Draw a model like the one shown in Figure, for each of the following situations. Indicate whether or not there is deadlock in the situation. Assume that there is only one unit of each resource type....
What are the advantages and disadvantages of making the computer network transparent to the user?
Determine the reactions at the beam supports for the given loading. Parabolas Nertices- 120 tvft 45 lb/ft -3.2 ft 2.1 ft-1.6 ft- -2.4 ft-
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...
Rate of evaporation of n-octane, at 20C, how many grams of liquid n-octane will evaporate into N 2 in 24.5 hr in a system such as that studied in Example 20.1-1 at system pressures of (a) 1atm, and...
The spectral transmissivity of a 50-m-thick polymer film is measured over the wavelength range 2.5m < < 15m. The spectral distribution may be approximated as = 0.80 for 2.5m < < 7m, = 0.05 for 7m...
An analog signal of the form xa(t) = a(t) cos2000?t is bandlimited to the range 900 ? F ? 1100 Hz. It is used as an input to the system shown in figure.(a) Determine and sketch the spectra for the...
Air is compressed steadily by an 8 - kW compressor from 100 kPa and 17°C to 600 kPa and 167°C at a rate of 2.1 kg/min. Neglecting the changes in kinetic and potential energies, determine. (a)...
A flow, 0.2 kg/s dry air, of moist air at 40C, 50% relative humidity flows from the outside state 1 down into a basement where it cools to 16C, state 2. Then it flows up to the living...
You drive a car on a winter day with the atmospheric air at 15C and you keep the outside front windshield surface temperature at + 2C by blowing hot air on the inside surface. If the...
Ball B is suspended from a cord of length l attached to cart A, which can roll freely on a frictionless, horizontal track. The ball and the cart have the same mass m. If the ball is given an initial...
The 3-lb uniform slender bar AB is connected to the 6-lb gear B which meshes with the stationary outer gear C. The centroidal radius of gyration of gear B is 1.2 in. Knowing that the system is...
The 4-kg rod AB can slide freely inside the 6-kg tube CD. The rod was entirely within the tube (x = 0) and released with no initial velocity relative to the tube when the angular velocity of the...
Gas absorption with chemical reaction (Fig. 18.4-1), rework the problem solved in S18.4, by starting with Eq. 19.1-16. What assumptions do you have to make in order to get Eq. 18.4-4?
Before being recirculated to a dryer, air at 96oF, 1 atm, and 70% relative humidity is to be dehumidified to 10% relative humidity. Cooling water is available at 50F. Determine a method for carrying...
An ideal vapor compression refrigeration cycle with R-134a as the working fluid operates between the pressure limits of 120 kPa and 700 kPa. The mass fraction of the refrigerant that is in the liquid...
The schematic of a single-flash geothermal power plant with state numbers is given in Fig. P18-91. Geothermal resource exists as saturated liquid at 230oC. The geothermal liquid is withdrawn from the...
A paper mill has two steam generators, one at 4.5 MPa, 300C and one at 8 MPa, 500C. Each generator feeds a turbine, both of which have an exhaust pressure of 1.2 MPa and isentropic...
A coolant flows through a rectangular channel (gallery) within the body of a mold used to form metal injection parts. The gallery dimensions are a = 90 mm and b = 9.5 mm, and the fluid flow rate is...
In order to shorten the distance required for landing, a jet airplane is equipped with moveable vanes which partially reverse the direction of the air discharged by each of its engines. Each engine...
(a) Determine the impulse response of an FIR lattice filter with parameters K1 = 0.6, K2 = 0.3, K3 = 0.5, and K4 = 0.9. (b) Sketch the direct form and lattice all-zero and all-pole filters specified...
During processor multiplexing using interrupts and the interval timer, the processor receives a timer interrupt when the interrupt request flag (interruptRequest) is set to TRUE by the interval timer...
Plot the Bode diagram (0.1 w 100) of the third- order transfer function, Find both the value of w that yields a ? 180 o phase angle and the value of AR at that frequency. G(6) (10s + 1)(2s + 1)(s + 1)
Shinskey (1994) has proposed a delay-time compensator of the form, for a FOPTD process, with Kc = 1/Kp and ?I = ?.(a) Derive the closed-loop transfer function and show that the time delay is...
The closed-loop system in Fig has the following transfer functions: (a) Design a feedforward controller based on a steady-state analysis. (b) Design a feedforward controller based on a dynamic...
Standard design practice, as exhibited by the solutions to Probs. 839 to 843, is to assume that the bolts, or rivets, share the shear equally. For many situations, such an assumption may lead to an...
Propane is compressed isothermally by a piston cylinder device from 100C and 1 MPa to 4 MPa. Using the generalized charts, determine the work done and the heat transfer per unit mass of propane.
Determine the directions of the principal axes with origin located at point O, and the principal moments of inertia for the area about these axes. Solve using Mohr's circle Given: a = 4 in b = 2 in c...
For the three forces of Prob. 2.38, determine (a) The required value of α if the resultant is to be vertical, (b) The corresponding magnitude of the resultant. Problem 2.38: Knowing...
A radiant heater, which is used for surface treatment processes, consists of a long cylindrical heating element of diameter D 1 = 0.005 m and emissivity ? 1 = 0.80. The heater is partially enveloped...
A typical winter day in Reno, Nevada (39o N latitude), is cold but sunny, and thus the solar heat gain through the windows can be more than the heat loss through them during daytime. Consider a house...
The anatomical center of gravity G of a person can be determined by using a scale and a rigid board having a uniform weight W1 and length l. With the persons weight W known, the person lies down on...
The gate at the end of a 1-m-wide freshwater channel is fabricated from three 125-kg, rectangular steel plates. The gate is hinged at A and rests against a frictionless support at D. Determine the...
The problem of heat losses from a fluid moving through a buried pipeline has received considerable attention. Practical applications include the trans-Alaska pipeline as well as power plant steam and...
An annular fin of thickness t is used as a radiator to dissipate heat for a space power system. The fin is insulated on the bottom and may be exposed to solar irradiation GS. The fin is coated with a...
Suppose a system has a disk with 2KB disk blocks and the average access time on a block is 20 milliseconds. A process holding 40KB of memory changes from the running state to the blocked state due to...
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...