If the coefficient of static friction between the collars A and B and the rod is ? s = 0.6, determine the maximum angle for the system to remain in equilibrium, regardless of the weight of cylinder...

Pressure transducers are commonly used to measure pressure by generating analog signals usually in the range of 4 mA to 20 mA or 0 V-dc to 10 V-dc in response to applied pressure. The system whose...

Conditions at the bottom tray of a reboiled stripper are as shown in Figure. If valve trays are used with a 24-in. tray spacing, estimate the required column diameter for operation at 80% offlooding....

A horizontal tube 1 m long with a surface temperature of 70C is used to condense saturated steam at 1 atm. (a) What diameter is required to achieve a condensation rate of 125 kg/h? (b) Plot the...

Several linear transmitters have been installed and calibrated as follows: (a) Develop an expression for the output of each transmitter as a function of its input. Be sure to include appropriate...

Determine the force components acting on the ball-and- socket at A, the reaction at the roller B and the tension on the cord CD needed for equilibrium of the quarter circularplate. 350 N 200 N 200 N...

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...

(a) For laminar draining of a wide thin sheet of water on pavement sloped at angle θ, as in Fig. P4.36, show that the flow rate is given by where b is the sheet width and h its depth (b) By...

When a hydrocarbon fuel is burned, almost all of the carbon in the fuel burns completely to form CO2 (carbon dioxide), which is the principal gas causing the greenhouse effect and thus global climate...

In a steam heating system, air is heated by being passed over some tubes through which steam flows steadily. Steam enters the heat exchanger at 30 psia and 400F at a rate of 15 lbm/min and leaves at...

Consider nodal configuration 2 of Table 4.2. Derive the finite-difference equations under steady-state conditions for the following situations. (a) The horizontal boundary of the internal comer is...

Determine the average convection heat transfer coefficient for the 2.5-m-high vertical walls of a home having respective interior air and wall surface temperatures of (a) 20 and 10C and (b) 27 and 37C

In Problem 3.25, determine the perpendicular distance from point A to a line drawn through points C and G. Problem 3.25: The ramp ABCD is supported by cables at corners C and D. The tension in each...

The large mechanical tongs shown are used to grab and lift a thick 1800-lb steel slab HJ. Knowing that slipping does not occur between the tong grips and the slab at H and J, determine the components...

Flow of a polyisoprene solution in a pipe, a 13.5% (by weight) solution of polyisoprene in isopentane has the following power law parameters at 323 K: n = 0.2 and m = 5 x 10 3 Pa s n . It is being...

At temperatures between 775C (1048 K) and 1100C (1373 K), the activation energy and preexponential for the diffusion coefficient of Fe 2+ in FeO are 102,000 J/mol and 7.3 10 -8 m 2 /s, respectively....

Find the power absorbed by the 10-K ohms resistor in the circuit shown. 11 mA 10 k 2000

Given that a current sheet with surface current density Js = x8 (A/m) exists at y = 0, the interface between two magnetic media, and H1 = z11 (A/m) in medium 1 (y > 0), determine H2 in medium 2(y <...

Water at 70C is to be passed through a porous polyethylene membrane of 25% porosity with an average pore diameter of 0.3 micron and an average tortuosity of 1.3. The pressures on the downstream and...

In large steam power plants, the feedwater is frequently heated in a closed feedwater heater by using steam extracted from the turbine at some stage. Steam enters the feedwater heater at 1 MPa and...

Viscosity of suspensions, data of V and 3 for suspensions of small glass spheres in aqueous glycerol solutions of ZnI 2 can be represented up to about ? = 0.5 by the semi empirical expression Compare...

Height of a packed-tower absorber a packed tower of the type described in Example 23.5-2 is to be used for removing 90% of the cyclohexane from a cyclohexane-air mixture by absorption into a...

Most of the concrete used in the construction of buildings, roads, dams, and bridges is made from port land cement, a substance obtained by pulverizing the hard, granular residue (clinker) from the...

Determine the angle ? between the sides of the triangular plate. 3 m Sm

A certain OS supports four different address spaces for each process, called Sa, Sb, Sc, and Sd. Suppose the memory manager loads the four address spaces into physical memory as shown: What is the...

Measurement devices and their dynamic5 influence design of feedback controllers. Briefly indicate which of the two systems below would have its closed- loop performance enhanced significantly by...

Air in an automobile tire is maintained at a pressure of 220 kPa (gauge) in an environment where the atmospheric pressure is 94 kPa. The air in the tire is at the ambient temperature of 25C. Now a...

The elbow joint is flexed using the biceps brachii muscle, which remains essentially vertical as the arm moves in the vertical plane. If this muscle is located a distance a from the pivot point A on...

A piece of machinery of weight W is temporarily supported by cables AB, AC, and ADE. Cable ADE is attached to the ring at A, passes over the pulley at D and back through the ring, and is attached to...

A flue passing hot exhaust gases has a square cross section, 300 mm to a side. The walls are constructed of refractory brick 150 mm thick with a thermal conductivity of 0.85 W/m K. Calculate the...

A load of weight 400 N is suspended from a spring and two cords which 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...

Two identical 16-lb uniform cylinders of radius r = 4 in. are at rest when a couple M of constant magnitude 4 lb ??ft is applied to cylinder A. Slipping occurs between the two cylinders and between...

Growers use giant fans to prevent grapes from freezing when the effective sky temperature is low. The grape, which may be viewed as a thin skin of negligible thermal resistance enclosing a volume of...

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...

Given the network in figure, find the power dissipated in the 3-? resistor and the energy stored in the capacitor. 2H 3H ww 40 12 v(+ $60 2 F

Dijkstra posed each of the following solutions as a potential software solution to the critical section problem and then explained why they failed [Dijkstra, 1968]. Provide your explanation about why...

Aluminum sulfate, commonly called alum, is produced as a concentrated aqueous solution from bauxite ore by reaction with aqueous sulfuric acid, followed by a three-stage, countercurrent washing...

A simple Brayton cycle using air as the working fluid has a pressure ratio of 8. The minimum and maximum temperatures in the cycle are 310 and 1160 K. Assuming an isentropic efficiency of 75 percent...

Consider a steam power plant operating on the ideal Rankine cycle with reheat between the pressure limits of 25 MPa and 10 kPa with a maximum cycle temperature of 600C and a moisture content of 8...

As an alternative to storing radioactive materials in oceanic waters, it is proposed that the system of Problem 3.62 be placed in a large tank for which the flow of water, and hence the convection...

The temperature distribution in laser-irradiated materials is determined by the power, size, and shape of the laser beam, along with the properties of the material being irradiated. The beam shape is...

A cubical furnace 2 m on a side is used for heat treating steel plate. The top surface of the furnace consists of electrical radiant heaters that have an emissivity of 0.8 and a power input of 1.5 x...

Consider an ideal gas mixture of n species. (a) Derive an equation for determining the mass fraction of species i from knowledge of the mole fraction and the molecular weight of each of the n...

Explain why an economic tradeoff exists between the number of trays and the reflux ratio.

Find the equivalent resistance of the circuit shown at the terminals A-B. 12 kQ 12 kQ 6 kQ 6 kQ RAB 12 kQ 12 kQ 4 kQ

A reaction chamber contains a mixture of CO2, CO, and O2 in equilibrium at a specified temperature and pressure. How will (a) Increasing the temperature at constant pressure and (b) Increasing the...

A 500-L insulated tank contains air at 40C, 2 MPa. A valve on the tank is opened, and air escapes until half the original mass is gone, at which point the valve is closed. What is the...

Collar B slides along rod AC and is attached to a block that moves in a vertical slot. Knowing that R = 18 in., = 30?, = 6 rad/s, and = 4 rad/s2, determine the velocity and acceleration of collar...

A thin plate of the shape indicated and of mass m is suspended from two springs as shown. If spring 2 breaks, determine the acceleration at that instant (a) Of point A, (b) Of point B. A square plate...

Use Table B.11 to determine the specific enthalpy (kJ/mol HCI) of hydrochloric acid containing 1 mol HC1/5 mol H2O at 25C relative to: (a) HCI (g) and H2O (l) at 25C. (b) H2O (1) and an infinitely...

The air-release flap on a hot-air balloon is used to release hot air from the balloon when appropriate. On one hot-air balloon, the air release opening has an area of 0.5 m2, and the filling opening...

An insulated piston-cylinder device contains 3 L of saturated liquid water at a constant pressure 180 kPa. An electric resistance heater inside the cylinder is now turned on, and 2000 kJ of energy is...

A large reservoir at 600 K supplies air flow through a converging-diverging nozzle with a throat area of 2 cm2, A normal shock wave forms at a section of area 6 cm2. Just downstream of this shock,...

Consider a steam power plant that operates on a simple ideal Rankine cycle and has a net power output of 45 MW. Steam enters the turbine at 7 MPa and 500C and is cooled in the condenser at a pressure...

One kilogram of butane (C4H10) is burned with 25 kg of air that is at 30C and 90 kPa. Assuming that the combustion is complete and the pressure of the products is 90 kPa, determine (a) The percentage...

The vise shown consists of two members connected by two double-threaded screws of mean radius 6 mm and pitch 2 mm. The lower member is threaded at A and B (μs =0.35), but the upper...

A uniform slender bar AB of mass m is suspended as shown from a uniform disk of the same mass m. Determine the accelerations of points A and B immediately after a horizontal force P has been applied...

Carbon monoxide is burned with 100 percent excess air during a steady-flow process at a pressure of 1 atm. At what temperature will 97 percent of CO burn to CO2? Assume the equilibrium mixture...

A designer has available a number of eight-point FFT chips. Show explicitly how he should interconnect three such chips in order to compute a 24-point DFT.

The horizontal x axis is drawn through the centroid C of the area shown and divides the area into two component areas A 1 and A 2 . Determine the first moment of each component area with respect to...

Two collars C and D move along the vertical rod shown. Knowing that the velocity of collar C is 33 in./s downward, determine(a) The velocity of collar D,(b) The angular velocity of memberAB. -12 ins...

A 45-kg motor is bolted to a light horizontal beam which has a static deflection of 6 mm due to the weight of the motor. The unbalance of the motor is equivalent to a mass of 110 g located 75 mm from...

Figure shows the block diagram of a wideband frequency modulator using the indirect method. This modulator is used to transmit audio signals containing frequencies in the range of 100 Hz to 15 kHz by...

The tungsten filament described in Problem 12.29 dissipates 75 W in an evacuated spherical light bulb of 75-mm diameter. The bulb is in quiescent air and large surroundings at a temperature of 25C....

A spherical shell satellite (3-m-OD, 1.25-cm-wall thickness, made of stainless steel) reenters the atmosphere from outer space. If its original temperature is 38?C, the effective average temperature...

Find the total inductance at the terminals of the network in Figure P5.62 mH 3mH 6mH LT 10mH 4mH Figure 5.62

A promising method of power generation involves collecting and storing solar energy in large artificial lakes a few meters deep, called solar ponds. Solar energy is absorbed by all parts of the pond,...

The drinking water needs of a production facility with 20 employees are to be met by a bobbler type water fountain. The refrigerated water fountain is to cool water from 22 to 8°C and supply cold...

A square plate of pure aluminum 0.5 m on a side and 16 mm thick is initially at 300C and is suspended in a large chamber. The walls of the chamber are maintained at 27C, as is the enclosed air. If...

Two loads are suspended as shown from cable ABCD. Knowing that the maximum tension in the cable is 720 lb, determine (a) The distance dB, (b) The distance dC. t ft- 4 h -2ft de 450 lh

A space vehicle is in a circular orbit of 1400-mi radius around the moon. To transfer to a smaller orbit of 1300-mi radius, the vehicle is first placed in an elliptic path AB by reducing its speed by...

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.

To level a wood deck, wood wedges A and B are placed under a corner of the deck, and wedge B rests on a wood board as shown. Knowing that the coefficient of static friction between all wood surfaces...

Flow through a Venturi tube, a Venturi tube, with a throat 3 in. in diameter, is placed in a circular pipe I ft in diameter carrying dry air. The discharge coefficient C d of the meter is 0.98....

The cable segments support the loading shown. Determine the magnitude of the horizontal force P so that xB = 6ft. 5'ft ft 60 lb 2 ft D. -3 ft-

A 25-antenna is connected to a 75-lossless transmission line. Reflections back toward the generator can be eliminated by placing a shunt impedance Z at a distance l from the load....

Determine the angle at which P should act on the block so that the magnitude of P is as small as possible to begin pulling the block up the incline. What is the corresponding value of P? The block...

A steel bar, 20 mm in diameter and 200 mm long, with an emissivity of 0.9, is removed from a furnace at 455C and suddenly submerged horizontally in a water bath under atmospheric pressure. Estimate...

A machine element is supported by springs and is connected to a dashpot as shown. Show that if a periodic force of magnitude P = Pm sin ft is applied to the element, the amplitude of the fluctuating...

Chloroform is to be used to extract benzoic acid from wastewater effluent. The benzoic acid is present at a concentration of 0.05 mol/liter in the effluent, which is discharged at a rate of 1,000...

A thirsty woman opens the refrigerator and picks up a cool canned drink at 40F. Do you think the can will sweat as she enjoys the drink in a room at 80F and 50 percent relative humidity?

An insurance company has hired you as a consultant to improve their understanding of burn injuries. They are especially interested in injuries induced when a portion of a worker's body comes into...

A sphere (k = 185 W/m K, = 7.25 x 105 m2/s) of 30-mm diameter whose surface is diffuse and gray with an emissivity of 0.8 is placed in a large oven whose walls are of uniform temperature at 600 K....

Two large parallel plates with surface conditions approximating those of a blackbody are maintained at 1500 and 500?F, respectively. Determine the rate of heat transfer by radiation between the...

Consider the cell,|| S.C.E cell solution |whose voltage is - 0.126 V. The cell solution contains 2.00 mmol of Fe(NH 4 ) 2 (SO 4 ) 2 , 1.00 mmol of FeCl 3 , 4.00 mmol of Na 2 EDTA, and lots of buffer,...

The separation of propane and propylene is accomplished by distillation, but at the expense of more than 100 trays and a reflux ratio of greater than 10. Consequently, the use of adsorption has been...

A rigid tank contains 1.5 kg of water at 120C and 500 kPa. Now 22 kJ of shaft work is done on the system and the final temperature in the tank is 95C. If the entropy change of water is zero and the...

Determine the force in each member of the truss in terms of the external loading and state if the members are in tension or compression.

Air at 4 x 10-4 kg/s and 27C enters a triangular duct that is 20 mm on a side and 2 m long. The duct surface is maintained at 100C. Assuming fully developed flow throughout the duct, determine the...

Liquid n-pentane at 25C is burned with 30% excess oxygen (not air) fed at 75C. The adiabatic flame temperature is T ad (C). (a) Take as a basis of calculation 1.00 mol C 5 H 12 (l) burned and use an...

Methane and 30% excess air are to be fed to a combustion reactor. An inexperienced technician mistakes his instructions and charges the gases together in the required proportion into an evacuated...

The concrete gravity dam is designed so that it is held in position by its own weight. Determine the minimum dimension x so that the factor of safety against overturning about point A of the dam is...

Two parallel, circular loops carrying a current of 40 A each are arranged as shown in Fig. 5-39 (P5.14). The first loop is situated in the xy plane with its center at the origin and the second loops...

A small door having a mass of 7 kg is attached by hinges A and B to a wall and is held in the horizontal position shown by rope EFH. The rope passes around a small, frictionless pulley at F and is...

(a) Calculate the number of theoretical plates needed to achieve a resolution of 2.0 for compounds with unadjusted relative retention times of t2/t1 = 1.01, 1.05, or 1.10. (b) How can you increase N...

The hot-water needs of a household are met by a 60- L electric water heater whose heaters are rated at 1.6 kW. The hot-water tank is initially full with hot water at 80°C. Somebody takes a shower...

A pistoncylinder device contains 5 kg of steam at 100C with a quality of 50 percent. This steam undergoes two processes as follows: 1-2 Heat is transferred to the steam in a reversible manner while...

A block of weight W is attached to a light rod AD that pivots at pin A. If the coefficient of static friction between the plane and the block is s , determine the minimum angle at which the block...

A compressor is used to bring saturated water vapor at 1 MPa up to 17.5 MPa, where the actual exit temperature is 650C. Find the irreversibility and the second-law efficiency.

Electronic devices dissipating electrical power can be cooled by conduction to a heat sink. The lower surface of the sink is cooled, and the spacing of the devices w s , the width of the device W d'...