Recovering and reusing organic solvents (rather than discharging the solvents in waste streams) is an important part of the operation of most chemical plants. The magnitude of these recovery efforts...

During the isothermal heat rejection process of a Carnot cycle, the working fluid experiences an entropy change of 0.7 Btu/R. If the temperature of the heat sink is 95°F, determine (a) The amount...

Refrigerant-134a enters the compressor of a refrigerator at 140 kPa and -10C at a rate of 0.3 m3/min and leaves at 1 MPa. The isentropic efficiency of the compressor is 78 percent. The refrigerant...

Knowing that at the instant shown the angular velocity of rod BE is 4 rad/s counterclockwise, determine (a) The angular velocity of rod AD, (b) The velocity of collar D, (c) The velocity of point A....

The silo has a weight W, a center of gravity at G and a radius r. Determine the vertical component of force that each of the three struts at A, B, and C exerts on the silo if it is subjected to a...

Three cubic meters of a 1.00-molar aqueous sulfuric acid solution (SG = 1.064) is stored at 25C. Use data in Tables B.1 and B.11 to calculate the standard heat of formation of the solution in kJ/mol...

A long roll of 2-m-wide and 0.5-cm-thick 1-Mn manganese steel plate (Æ¿ = 7854 kg/m3 and cp = 0.434 kJ/kg·°C) coming off a furnace at 820°C is to be quenched in an oil...

A steam power plant receives heat from a furnace at a rate of 280 GJ/h. Heat losses to the surrounding air from the steam as it passes through the pipes and other components are estimated to be about...

The air in a room has a dry-bulb temperature of 22C and a wet-bulb temperature of 16C. Assuming a pressure of 100 kPa, determine (a) The specific humidity, (b) The relative humidity, and (c) The...

A nickel-coated heater element with a thickness of 15 mm and a thermal conductivity of 50W/m K is exposed to saturated water at atmospheric pressure. A thermocouple is attached to the back surface,...

The 4-oz pin B slides along the slot in the rotating arm OC and along the slot DE which is cut in a fixed horizontal plate. Neglecting friction and knowing that arm OC rotates at a constant rate te...

The vertical force F acts downward at A on the two membered frame. Determine the magnitudes of the two components of F directed along the axes of AB and AC. Set F = 350 lb. 30

A distillation column having eight theoretical stages (seven in the column + partial reboiler + total condenser) is being used to separate 100 krnol/h of a saturated-liquid feed containing 50 mol% A...

Two steel tubes are shrink-fitted together where the nominal diameters are 1.50, 1.75, and 2.00 in. Careful measurement before fitting revealed that the diametral interference between the tubes to be...

A river flowing steadily at a rate of 240 m3/s is considered for hydroelectric power generation. It is determined that a dam can be built to collect water and release it from an elevation difference...

A pipeline, used for the transport of crude oil, is buried in the earth such that its centerline is a distance of 1.5 m below the surface. The pipe has an outer diameter of 0.5 m and is insulated...

Assuming a transition Reynolds number of 5 x 105, determine the distance from the leading edge of a flat plate at which transition will occur for each of the following fluids when u; = 1 m/s:...

The cable supports the uniform distributed load of w0 = 600 lb/ft. Determine the tension in the cable at each support A and B. 15 ft 10 ft Wo 25 ft-

A plate 4 in wide, 8 in long, and 0.5 in thick is loaded in tension in the direction of the length. The plate contains a crack as shown in Fig. 526 with the crack length of 0.625 in. The material is...

The manometer fluid in Fig P3.157 is mercury. Estimate the volume flow in the tube if the flowing fluid is (a) gasoline and (b) nitrogen, at 20°C and 1 atm. 3in (1) (2 )

Air is compressed in a pistoncylinder device from 90 kPa and 20C to 400 kPa in a reversible isothermal process. Determine (a) The entropy change of air and (b) The work done.

Determine the force in each member of the Pratt bridge truss shown. State whether each member is in tension or compression. -3 -31 -3 - 6 kN 6 kN 6 kN

At a given point in a flow, T = 700oR, p = 1.6atm, and V = 2983 ft/s. At this point, calculate the corresponding values of p0, T0, p*, T*, and M*. Discuss.

It has been suggested that Atlanta?Fulton County Stadium earned the nickname ?The Launching Pad? because baseballs carried farther than normal in the region?s hot, humid atmosphere. With this...

A mixture of hydrocarbon gases is composed of 60 percent methane, 25 percent propane, and 15 percent butane by weight. This mixture is compressed from 100 kPa and 20oC to 1000 kPa in a reversible,...

From elementary physics, we know that when an object is subjected to a constant acceleration a, the relationship between distance d and time t is given by d = at2. Suppose that, during a seek, the...

At winter design conditions, a house is projected to lose heat at a rate of 60,000 Btu/h. The internal heat gain from people, lights, and appliances is estimated to be 6000 Btu/h. If this house is to...

A half section of a uniform thin pipe of mass m is at rest when a force P is applied as shown. Assuming that the section rolls without sliding, determine (a) Its initial angular acceleration, (b) The...

The flywheel of a small punching machine rotates at 360 rpm. Each punching operation requires 2034 J of work and it is desired that the speed of the flywheel after each punching be not less that 95...

A single distillation column for separating a three component mixture into three products is shown in Figure. Are the design variables shown sufficient to specify the problem completely? If not, what...

The slender rods have weight density . Determine the moment of inertia for the assembly about an axis perpendicular to the page and passing through point A Given: = 3lb/ft a = 1.5 ft b = 2 ft A

A plane contains the vectors A and B. Determine the unit vector normal to the plane when A and B equal to, respectively, (a) 12 a i6j+9k and 3i+9j7.5k, (b) 14i2j+8k and 3i+1.5jk

The objective of this problem is to develop thermal models for estimating the steady-state temperature and the transient temperature history of the electrical transformer shown below. The external...

A helical compression spring is wound using 0.105-in-diameter music wire. The spring has an outside diameter of 1.225 in with plain ground ends, and 12 total coils. (a) What should the free length be...

A holding fixture for a work piece 1 in thick at clamp locations is being designed. The detail of one of the clamps is shown in the figure. A spring is required to drive the clamp upward while...

Estimate the safe static load F for the weldment shown in the figure if an E6010 electrode is used and the design factor is to be 2. Use conventional analysis. br> 4 in 6 in in 8 in in

A well-sealed room contains 60 kg of air at 200 kPa and 25C. Now solar energy enters the room at an average rate of 0.8 kJ/s while a 120-W fan is turned on to circulate the air in the room. If heat...

Cold water at 10°C enters a water heater at the rate of 0.02 m3/min and leaves the water heater at 50°C. The water heater receives heat from a heat pump that receives heat from a heat source...

A long bar of rectangular cross section, 0.4 m x 0.6 m on a side and having a thermal conductivity of 1.5 W/m K is subjected to the boundary conditions shown below. Two of the sides are maintained...

Consider a long duct constructed with diffuse, gray walls 1 m wide (a) Determine the net radiation transfer from surface A 1 per unit length of the duct. (b) Determine the temperature of the...

(a) Would you need NaOH or HCl to bring the pH of 0.050 0 M HEPES (Table 8-2) to 7.45? (b) Describe how to prepare 0.250 L of 0.050 0 M HEPES, pH 7.45.

A thin plate of mass m has the trapezoidal shape shown. Determine the mass moment of inertia of the plate with respect to (a) The centroidal axis CC that is perpendicular to the plate, (b) The axis...

Write a computer program to fit a straight line y = ax + b to tabulated (x, y) data, assuming that no more than 100 data points will be taken in any one run. Your program should read in and store the...

Chlorine gas is to be heated from 100C and 1 atm to 200C. (a) Calculate the heat input (kW) required to heat a stream of the gas flowing at 5.0 k mol/s at constant pressure. (b) Calculate the heat...

For the beam and loading shown, determine (a) The magnitude and location of the resultant of the distributed load, (b) The reactions at the beam supports. Farabola Vertex 1200 N/m 300 N/m AA -6 m

Determine by direct integration the location of the centroid of the volume between the xz plane and the portion shown of the surface 16 ( - ) (bz - 2?) a-b? y =

In a cylindrical fuel rod of a nuclear reactor, heat is generated internally according to the equation where qg = local rate of heat generation per unit volume at rro = outside radiusq1 = rate of...

Complete this table for H2O TCP kPa h, kJ/kg x Phase description 200 0.7 140 1800 0.0 950 80 500 800 3162.2

The four-member "A" frame is supported at A and E by smooth collars and at G by a pin. All the other joints are ball-and-sockets. If the pin at G will fail when the resultant force there is Fmax,...

Phosgene (COCl 2 ) is formed by CO and Cl 2 reacting in the presence of activated charcoal: CO + Cl 2 ? COCl 2? At T = 303.8 K the rate of formation of phosgene in the presence of 1 gram of charcoal...

One ton of liquid water at 80°C is brought into a well-insulated and well-sealed 4-m x 5-m x 7-m room initially at 22°C and 100 kPa. Assuming constant specific heats for both air and water at...

Determine the moment of inertia and the radius of gyration of the shaded area shown with respect to the x axis. y =-mx y =mx. y=-kr y= kr3

Two formulas for the heat capacity of CO are given here: Cp [cal/(mol C)] = 6.890 + 0.001436T (C) Cp (Btu/(lb-moleF)] = 6.864 + 0.0007978T (F) Starting with the first formula, derive the second....

Helium gas at 25C and 4 bars is contained in a glass cylinder of 100-mm inside diameter and 5-mm thickness. What is the rate of mass loss per unit length of the cylinder?

A parallel RLC circuit contains a resistor R = 1 and an inductor L = 2H. Select the value of the capacitor so that the circuit is critically damped.

During a picnic on a hot summer day, all the cold drinks disappeared quickly, and the only available drinks were those at the ambient temperature of 75F. In an effort to cool a 12-fluid-oz drink in a...

The angle between the spring AC and the post DA is 30°. Knowing that the x component of the force exerted by spring AC on the plate is 180 N, determine (a) The tension in spring AC, (b) The...

A rod is bent into a circular arc of radius 4 in. as shown. For the given loading, determine (a) The location at which the value of the bending moment is maximum, (b) The internal forces at that...

In a particular application it is desirable to minimize the effects of the thermal contact resistance between two plane mating surfaces as shown in part (a) Of the schematic. An engineer suggests...

Express each force in Cartesian vector form. Units Used: kN = 103 N Given: F1 = 5kN F2 = 2kN θ1 = 60 deg θ2 = 60 deg θ3 = 45 deg F1

A single-pass, cross-flow heat exchanger with both fluids unmixed is being used to heat water (m c = 2 kg/s. c p = 4200 J/kg K) from 20C to 100C with hot exhaust gases (c p = 1200 J/kg K) entering...

At least 25 g of tetrahydrocannabinol (THC), the active ingredient in marijuana, is required to produce intoxication. The molecular formula of THC is C21H30O2. How many moles of THC does this 25 g...

Link 2, shown in the figure, is 1 in wide, has 1 2 -in-diameter bearings at the ends, and is cut from low-carbon steel bar stock having a minimum yield strength of 24 kpsi. The end-condition...

Choose an Oiles SP 500 alloy brass bushing to give a maximum wear of 0.002 in for 1000 h of use with a 400 rev/min journal and 100 lbf radial load. Use hCR = 2.7 Btu/ (h. ft2. F), Tmax = 300F, fs =...

Air enters a heating section at 95 kPa, 12C, and 30 percent relative humidity at a rate of 6 m3/min and it leaves at 25C. Determine (a) The rate of heat transfer in the heating section and (b) The...

A chemical reaction with stoichiometry A ? products is said to follow an n th -order rare law if A is consumed at a rate proportional to the nth power of its concentration in the reaction mixture. If...

Chain AB supports a horizontal, uniform steel beam having a mass per unit length of 85 kg/m. If the maximum tension in the chain is not to exceed 8 kN, determine (a) the horizontal distance a from A...

A device used to measure the surface temperature of an object to within a spatial resolution of approximately 50 nm is shown in the schematic. It consists of an extremely sharp-tipped stylus and an...

Determine the magnitude and coordinate direction angles of the resultant force. Given: F1 = 350 N α = 60 deg F2 = 250N β = 60 deg c = 3 γ = 45 deg d = 4 θ = 30 deg F2

Three loads are suspended from cable ABCDE. Determine distance dC knowing that the maximum tension in the cable is 5 kips. 15 ft-15 ft-15 ft -15 ft E. dy de 0.4 kip 12 kips os kip

A spherical shell of inner and outer radii r i and r 0 , respectively, is filled with a heat-generating material that provides for a uniform volumetric generation rate (W/m 3 ) of q. The outer...

A fuel gas containing 85.0 mole% methane and the balance ethane is burned completely with pure oxygen at 25C and the products are brought back down to 25C. (a) Suppose the reactor is continuous. Take...

Two liquid storage systems are shown in figure. Each tank is 4 feet in diameter. For System 1, the valve acts as a linear resistance with the flow?head relation q = 8.33 h, where q is in gallium and...

The winch cable on a tow truck is subjected to a force of T = 6 kN when the cable is directed at ? = 60 o . Determine the magnitudes of the total brake frictional force F for the rear set of wheels B...

Methyl isocyanate, CH3NCO, was made infamous in 1984 when an accidental leakage of this compound from a storage tank in Bhopal, India, resulted in the deaths of about 3,800 people and severe and...

Air enters an air-conditioning system that uses refrigerant-134a at 30C and 70 percent relative humidity at a rate of 4 m3/min. The refrigerant enters the cooling section at 700 kPa with a quality of...

Here is a student procedure to measure nicotine in urine. A 1.00-mL sample of biological fluid was placed in a 12-mL vial containing 0.7 g Na2CO3 powder. After 5.00 g of the internal standard...

In the engine system shown, l = 8 in. and b = 3 in. Knowing that the crank AB rotates with a constant angular velocity of 1000 rpm clockwise, determine the velocity of piston P and the angular...

For the network of Fig. 5.152: a. Calculate IB, IC, and re b. Determine Zi and Zo c. Calculate Av. d. Determine the effect of ro = 30 Ω on Av, 10 V 4.3 k2 Zo B- 100 2, +10 V

A company is considering making automobile bumpers from aluminum instead of from steel. List some of the factors it would have to consider in arriving at its decision. Many companies are critically...

Determine the moment of inertia for the beam's cross-sectional area about the y axis. Given: a = 25 mm b = 100 mm c = 25 mm d = 50 mm e = 75 mm

Quantization error in A/D conversion of a sinusoidal signal ? Let x q (n) be the signal obtained by quantizing the signals x(n) = sin 2? f 0 n.? The quantization error power P q is defined by The...

Assuming the upward reaction of the ground on beam AB to be uniformly distributed, (a) Draw the shear and bending-moment diagrams, (b) Determine the maximum absolute values of the shear and bending...

The elemental unit of an air heater consists of a long circular rod of diameter D, which is encapsulated by a finned sleeve and in which thermal energy is generated by Ohmic heating. The N fins of...

A system has been devised to store acetonitrile safely at high pressures and temperatures. The acetonitrile is contained in a 0.2-ft3 tank maintained at 4500psia and 550F. This tank is placed inside...

The shaft shown in the figure carries a 18-lbf gear on the left and a 32-lbf gear on the right. Estimate the first critical speed due to the loads, the shafts critical speed without the loads, and...

Sulfide ion was determined by indirect titration with EDTA. To a solution containing 25.00 mL of 0.04332 M Cu(ClO4)2 plus 15 mL of 1M acetate buffer (pH 4.5) were added 25.00 mL of unknown sulfide...

Benzene (B) and chlorobenzene (C) are being separated in a distillation column. Vapor and liquid streams, each containing both species, are fed to one of the trays of the column, and liquid and vapor...

The refrigerator has a weight of 180 lb and rests on a tile floor for which ? s = 0.25.Also, the man has a weight of 150 lb and the coefficient of static friction between the floor and his shoes is ?...

Calculate the time needed for a constant current of 0.8510 A to deposit 0.250 g of Co(II) as (a) Elemental cobalt on the surface of a cathode. (b) Co3O4 on an anode. Assume 100% current efficiency...

To form a nonsymmetrical girder, two L3 Ã 3 Ã ¼-in. angles and two L6 Ã 4 Ã ½-in. angles are welded to a 0.8-in. steel plate as shown. Determine the moments...

Collars B and D are pin-connected to bar ABD and can slide along fixed rods. At the instant shown the angular velocity of bar ABD is zero and its angular acceleration is 12 rad/s2 clockwise....

A variable, Q, is reported to have a value of 2.360 x 10 -4 kg m 2 /h. (a) Write a dimensional equation for Q', the equivalent variable value expressed in American engineering units, using seconds...

A water-cooling tower for a power plant cools 45C liquid water by evaporation. The tower receives air at 19.5C, 30%, 100 kPa that is blown through/over...

A very thick plate with thermal diffusivity 5.6 x 10-6 m2/s and thermal conductivity 20 W/m K is initially at a uniform temperature of 325C. Suddenly, the surface is exposed to a coolant at 15C for...

For flow over a flat plate with an extremely rough surface, convection heat transfer effects are known to be correlated by the expression of Problem 6.21. For airflow at 50 m/s, what is the surface...

To open an in-ground water valve, two workers apply the two horizontal forces shown to the handle of a valve wrench. Show that these forces are equivalent to a single force and specify, if possible,...

The vapor pressure of an organic solvent is 50 mm Hg at 25C and 200 mm Hg at 45 C. The solvent is the only species in a closed flask at 35C and is present in both liquid and vapor states. The volume...

A counter flow, concentric tube heat exchanger is designed to heat water from 20 to 80C using hot oil, which is supplied to the annuls at 160C and discharged at 140C. The thin-walled inner tube has a...

A rotary lawn-mower blade rotates at 3000 rev/min. The steel blade has a uniform cross section 1/8 in thick by 1 ¼ in wide, and has a ½ -in-diameter hole in the center as shown in the...