In Fig P6.109 there are 125 ft of 2-in pipe, 75 ft of 6-in pipe, and 150 ft of 3-in pipe, all cast iron. There are three 90° elbows and an open globe valve, all flanged. If the exit elevation is...
A pin fin of 10-mm diameter dissipates 30 W by forced convection to air in cross flow with a Reynolds number of 4000. If the diameter of the fin is doubled and all other conditions remain the same,...
A pre-heater involves the use of condensing steam at 100C on the inside of a bank of tubes to heat air that enters at 1 atm and 25C. The air moves at 5 m/s in cross flow over the tubes. Each tube is...
A coal contains 73.0 wt% C, 4.7% H (not including the hydrogen in the coal moisture) 3.7% S 6.8% H 2 O, and 11.8% ash. The coal is burned at a rate of 50,000lb m /h in a power plant boiler with air...
Figure P3.87 simulates a manifold flow, with fluid removed from a porous wall or perforated section of pipe. Assume incompressible flow with negligible wall friction and small suction Vw _V1... If...
In a production facility, 1.2-in-thick, 2-ft = 2-ft square brass plates (r = 532.5 lbm/ft3 and cp = 0.091 Btu/lbm ¢ °F) that are initially at a uniform temperature of 75°F are heated by...
Determine the force in each member of the truss and state if the members are in tension or compression. Units Used: kN = 103 N Given: P1 = 4kN P2 = 0kN a = 2 m = 15 deg P:
Knowing that the radius of each pulley is 200 mm and neglecting friction, determine the internal forces at point K of the frame shown. 18 m 0.2 m 0.6 m 0.8 m 0.2 m 360 N
Calculate the radius of a vanadium atom, given that V has a BCC crystal structure, a density of 5.96 g/cm 3 , and an atomic weight of 50.9 g/mol.
The uranyl nitrate (UN) in 2 kg of a 20 wt% aqueous solution is to be extracted with 500 g of tributyl phosphate. Using the equilibrium data in Exercise 5.9, calculate and compare the percentage...
A heavily insulated pistoncylinder device contains 0.05 m3 of steam at 300 kPa and 150C. Steam is now compressed in a reversible manner to a pressure of 1 MPa. Determine the work done on the steam...
An air-standard Diesel cycle has a compression ratio of 18.2. Air is at 80F and 14.7 psia at the beginning of the compression process and at 3000 R at the end of the heat addition process. Accounting...
A horizontal rod 5 mm in diameter is immersed in water maintained at 18C. If the rod surface temperature is 56C, estimate the free convection heat transfer rate per unit length of the rod.
Blocks A and B have masses of 4 kg and 1.5 kg, respectively, and are connected by a cord-and-pulley system and released from rest in the position shown with the spring undeformed. Knowing that the...
Knowing that at the instant shown rod AB has a constant angular velocity of 15 rad/s counterclockwise, determine (a) The angular acceleration of rod DE, (b) The acceleration of point D. 4.5.- -5m la...
The rated speed of drum B of the belt sander shown is 2400 rpm. When the power is turned off, it is observed that the sander coasts from its rated speed to rest in 10 s. Assuming uniformly...
Suppose that a multi programmed system has a load of N processes with individual total execution times of t1, t2 tN. How would it be possible that T > t 1 + t 2 + + t N ? That is, what could cause...
Air enters the diffuser of a ramjet engine at 25 kPa, 200 K, with a velocity of 3000 km/h, and is decelerated to a negligible velocity. On the basis of an air standard analysis, the heat addition is...
Two steel thin-wall tubes in torsion of equal length are to be compared. The first is of square cross section, side length b, and wall thickness t. The second is a round of diameter b and wall...
The section of the sealed joint shown in the figure is loaded by a repeated force P = 6 kip. The members have E = 16 Mpsi. All bolts have been carefully preloaded to Fi = 25 kip each
Knowing that WA = 25lb and θ = 30°, determine (a) The smallest value of B W for which the system is in equilibrium, (b) The largest value of WB for which the system is in...
To unload a bound stack of plywood from a truck, the driver first tilts the bed of the truck and then accelerates from rest. Knowing that the coefficients of friction between the bottom sheet of...
(a) For each of the following cases, determine what functions of time, e.g., constant, e ?8t , will appear in y(t). (Note that you do not have to find (t)1) Which y(t) are oscillatory? Which exhibit...
Detection limit. Low concentrations of Ni2+ -EDTA near the detection limit gave the following counts in a mass spectral measurement: 175, 104, 164, 193, 131, 189, 155, 133, 151, 176. Ten measurements...
Neglecting any effects caused by volume changes, would you expect the ionic strength to (1) increase, (2) decrease, or (3) remain essentially unchanged when NaOH is added to a dilute solution of (a)...
A 6-in-wide polyamide F-1 flat belt is used to connect a 2-in-diameter pulley to drive a larger pulley with an angular velocity ratio of 0.5. The center-to-center distance is 9 ft. The angular speed...
A household refrigerator with a COP of 1.2 removes heat from the refrigerated space at a rate of 60 kJ/min, determine (a) The electric power consumed by the refrigerator and (b) The rate of heat...
At the instant shown during deceleration, the velocity of an automobile is 12 m/s to the right. Knowing that the velocity of the contact point A of the wheel with the ground is 1.5 m/s to the right,...
Irreversible first-order reaction in a continuous reactor, a well-stirred reactor of volume V is initially completely filled with a solution of solute A in a solvent S at concentration C AO . At time...
A kettle containing 3.00 liters of water at a temperature of 18C is placed on an electric stove and begins to boil in four minutes. (a) Write an energy balance on the water, neglecting evaporation...
A seven-component mixture is flashed at a specified temperature and pressure.(a) Using the K-values and feed composition given below, make a plot of the Rachford-Rice flash function at intervals of ?...
One gram-mole of methyl chloride vapor is contained in a vessel at 100C and 10atm. (a) Use the ideal gas equation of state to estimate the system volume. (b) Suppose the actual volume of the vessel...
Determine the angle ? for connecting member A to the plate so that the resultant force FA and F n is directed horizontally to the right. Also, what is the magnitude of the resultant force? F=8 kN 40...
When the feed to a distillation column contains a small amount of impurities that are much more volatile than the desired distillate, it is possible to separate the volatile impurities from the...
An inventor claims to have developed a refrigeration system that removes heat from the closed region at -12C and transfers it to the surrounding air at 25C while maintaining a COP of 6.5. Is this...
Assuming the velocity field given in Prob. 2.6 pertains to an incompressible flow calculate the stream function and velocity potential. Using your results, show that lines of constant are...
What is the pH of a solution that is (a) Prepared by dissolving 3.30 g of (NH4)2SO4 in water, adding 125.0 mL of 0.1011 M NaOH, and diluting to 500.0 mL? (b) 0.120 M in piperidine and 0.010 M in its...
Figure P820 illustrates the connection of a cylinder head to a pressure vessel using 10 bolts and a confined-gasket seal. The effective sealing diameter is 150 mm. Other dimensions are: A = 100, B =...
A horizontal cylinder is separated into two compartments by an adiabatic, frictionless piston. One side contains 0.2 m3 of nitrogen and the other side contains 0.1 kg of helium, both initially at...
Atmospheric air at 25C and a velocity of 0.5 m/s flows over a 50- W incandescent bulb whose surface temperature is at 140C. The bulb may be approximated as a sphere of 50-mm diameter. What is the...
The center of gravity G of a 3.5-lb unbalanced tracking wheel is located at a distance r = 0.9 in. from its geometric center B. The radius of the wheel is R = 3 in. and its centroidal radius of...
As will be discussed in detail in Chapter 5, the ideal gas equation of state relates absolute pressure, P(atm); gas volume, V(liters); number of moles of gas, n(mol); and absolute temperature, T(K);...
A torsion-bar spring consists of a prismatic bar, usually of round cross section, that is twisted at one end and held fast at the other to form a stiff spring. An engineer needs a stiffer one than...
Morphine and morphine 3-β-D-glucuronide were separated on two different 4.6-mm diameter à 50-mm-long columns with 3-μm particles.39 Column A was C18-silica run at 1.4...
Repeat Exercise 4.53 if the residence time is only sufficient to leach 80% of the carbonate.
A blending tank that provides nearly perfect mixing is connected to a downstream unit by a Long transfer pipe. The blending tank operates dynamically like a first-order process. The mixing...
A yellow pine rod (SG = 0.65) is 5 cm by 5 cm by 2.2 m long. How much lead (SG = 11.4) is needed at one end so that the rod will float vertically with 30 cm out of the water? 0.3 m Wood 1.9 m Lead
Two steel pipes AB and BC, each having a weight per unit length of 5 lb/ft, are welded together at B and are supported by three wires. Knowing that a = 1. 25 ft, determine the tension in each wire.
Mutual solubility data for the isooctane (1)/furfural (2) system at 25?C are [Chem. Eng. Sci., 6, 116 (1957)] Compute: (a) The distribution coefficients for isooctane and furfural (b) The relative...
In the position shown, collar B moves to the left with a constant velocity of 300 mm/s. Determine(a) The velocity of collar A,(b) The velocity of portion C of the cable,(c) The relative velocity of...
Sketch the plots described below and calculate the equations for y(x) from the given information. The plots are all straight lines, Note that the given coordinates refer to abscissa and ordinate...
A long, cylindrical heating element of 20-mm diameter operating at 700 K in vacuum is located 40 mm from an insulated wall of low thermal conductivity (a) Assuming both the element and the wall are...
A distillation column is operated under steady-state conditions with a flow rate of 9650 lb/hr of distillate product. The operator suddenly changes the reboiler steam pressure from 92 psig to 95 psig...
For the liquid storage system shown in Fig. E, it is desired to control liquid levels h1 and h2 by adjusting volumetric flow rates q1 and q2. Flow rate q6 is the major disturbance variable. The...
Liquid propane is commonly used as a fuel for heating homes, powering vehicles such as forklifts, and filling portable picnic tanks. Consider a propane tank that initially contains 5 L of liquid...
A heat engine that rejects waste heat to a sink at 530 R has a thermal efficiency of 36 percent and a second-law efficiency of 60 percent. Determine the temperature of the source that supplies heat...
A 5-m-long beam is subjected to a variety of loadings. (a) Replace each loading with an equivalent force-couple system at end B of the beam. (b) Which of the loadings are equivalent? 60) N -5 m 400 N...
Cooling water flows through the 25.4-mm-diameter thin-walled tubes of a steam condenser at 1 m/s, and a surface temperature of 350 K is maintained by the condensing steam. The water inlet temperature...
In the planetary gear system shown, the radius of gears A, B, C, and D is 60 mm and the radius of the outer gear E is 180 mm, knowing that gear E has an angular velocity of 120 rpm clockwise and that...
An immersed electrical heater is used to raise the temperature of a liquid from 20?C to 60?C in 20.0 mm. The combined mass of the liquid and the container is 250 kg, and the mean heat capacity of the...
For many viscous materials, the viscosity ? may be defined in terms of the expression where ? and d?/dt are, respectively, the tensile stress and the strain rate. A cylindrical specimen of a...
Consider a two-stage cascade refrigeration system operating between the pressure limits of 1.2 MPa and 200 kPa with refrigerant-134a as the working fluid. The refrigerant leaves the condenser as a...
A steam power plant employs two adiabatic turbines in series. Steam enters the first turbine at 650oC and 7,000 kPa and discharges from the second turbine at 20 kpa. The system is designed for equal...
An experimental procedure for validating results of the foregoing problem involves preheating a copper disk to an initial elevated temperature T; and recording its temperature history T(t) as it is...
For the frame and loading shown, determine the components of the forces acting on member CFE at C and at F. 6 in. 40 Ib 4 in. -5 in.4 in.--4 in
Two identical slender rods AB and BC are welded together to form an L-shaped assembly. The assembly is pressed against a spring at D and released from the position shown. Knowing that the maximum...
An electrical coil is used to heat 20.0 kg of water in a closed well-insulated vessel. The water is initially at 25C and 1 atm. The coil delivers a steady 2.50 kW of power to the vessel and its...
Consider the metallic surface of Example 12.6. Additional measurements of the spectral, hemispherical emissivity yield a spectral distribution which may be approximated as follows: (a) Determine...
Solve Example 5.3 for an absorbent flow rate of 330 lbmol/h and three theoretical stages. Compare your results to the results of Example 5.3 and discuss the effect of trading stages for absorbent...
Intravenous infusions are usually driven by gravity by hanging the fluid bottle at sufficient height to counteract the blood pressure in the vein and to force the fluid into the body. The higher the...
For the homogeneous tetrahedron of mass m shown, (a) Determine by direct integration the mass product of inertia a Izx, (b) Deduce Iyz and Ixy from the results obtained in part a.
Consider the flat plate of Problem 3.101, but with the heat sinks at different temperatures, T(0) = To and T(L) = T L , and with the bottom surface no longer insulated. Convection heat transfer is...
Bonding with a thermo setting adhesive (Fig. 12A.3). it is desired to bond together two sheets of a solid material, each of thickness 0.77 cm. This is done by using a thin layer of thermosetting...
A simple ideal Brayton cycle is modified to incorporate multistage compression with intercooling, multistage expansion with reheating, and regeneration without changing the pressure limits of the...
A plane wall of thickness L = 0.1 m experiences uniform volumetric heating at a rate q. One surface of the wall (x = 0) is insulated, while the other surface is exposed to a fluid at Too = 20C, with...
The extent 10 which the tip condition affects the thermal performance of a fin depends on the fin geometry and thermal conductivity, as well as the convection coefficient. Consider an alloyed...
Three children are standing on a 15 15- ft raft. If the weights of the children at points A, B, and C are 85 lb, 60 lb, and 90 lb, respectively, determine the magnitude and the point of application...
A process stream flowing at 35k mol/h contains 15 mole% hydrogen and the remainder 1-butene. The stream pressure is 10.0 atm absolute, the temperature is 50C, and the velocity is 150m/min. Determine...
A ferromagnetic material has a remanence of 1.25 teslas and a coercivity of 50,000 A/m. Saturation is achieved at a magnetic field intensity of 100,000 A/m, at which the flux density is 1.50 teslas....
A well-insulated shell-and-tube heat exchanger is used to heat water (cp = 4.18 kJ/kg C) in the tubes from 20 to 70C at a rate of 4.5 kg/s. Heat is supplied by hot oil (cp = 2.30 kJ/kg C) that...
A four-cylinder spark-ignition engine has a compression ratio of 8, and each cylinder has a maximum volume of 0.6 L. At the beginning of the compression process, the air is at 98 kPa and 17C, and the...
The Stillwater geothermal power plant in Nevada, which started full commercial operation in 1986, is designed to operate with seven identical units. Each of these seven units consists of a pair of...
Determine the resultant moment of the forces about point A. Solve the problem first by considering each force as a whole, and then by using the principle of moments. Units Used: kN = 103 N Given: F1...
Heat is transferred from water to air through a brass wall (k = 54 W/(m K)). The addition of rectangular brass fins, 0.08 cm thick and 2.5 cm long, spaced 1.25 cm apart, is contemplated. Assuming a...
The walls of a refrigerator are typically constructed by sandwiching a layer of insulation between sheet metal panels. Consider a wall made from fiberglass insulation of thermal conductivity k; =...
Determine the reactions at A and D when = 30. 280 mm 180 mm 100 mm 150 N
Freeze concentration is used to produce a fruit-juice concentrate. A stream of fresh juice containing 12 wt% soluble solids in water at 20C is combined with a recycle stream to form a...
For a ceramic compound, what are the two characteristics of the component ions that determine the crystal structure?
Combustion in a diesel engine may be modeled as a constant-pressure heat addition process with air in the cylinder before and after combustion. Consider a diesel engine with cylinder conditions of...
Locate the centroid of the plane area shown. 2= 150 mm r,= 75 mm
A process fluid having a specific heat of 3500 J/kg K and flowing at 2 kg/s is to be cooled from 80C to 50C with chilled water, which is supplied at a temperature of 15C and a flow rate of 2.5 kg/so...
The uniform 20-lb ladder rests on the rough floor for which the coefficient of static friction is ? s = 0.8 and against the smooth wall at B. Determine the horizontal force P the man must exert on...
Consider a building whose annual air-conditioning load is estimated to be 120,000 kWh in an area where the unit cost of electricity is $0.10/kWh. Two air conditioners are considered for the building....
Locate the center of mass of the homogeneous rod bent into the shape of a circular arc. Given: r = 300 mm = 30 deg
Repeat Example 5.3 for N = 1, 3, 10, and 30 stages. Plot the percent absorption of each of the five hydrocarbons and the total feed gas, as well as the percent stripping of the oil versus the number...
Serious neck injuries can occur when a football player is struck in the face guard of his helmet in the manner shown, giving rise to a guillotine mechanism. Determine the moment of the knee force P =...
Water is added to pure sulfuric acid in a well-insulated flask initially at 25C and 1 atm to produce a 4.00-molar sulfuric acid solution (SG = 1.23 1). The final temperature of the product solution...
For the brake in Prob. 161, consider the pin and actuator locations to be the same. However, instead of 120, let the friction surface of the brake shoes be 90 and centrally located. Find the maximum...
An innovative engineer has invented a device to replace the hydraulic jacks found at many service stations. A movable piston with a diameter of 0.15 m is fitted into a cylinder. Cars are raised by...
The man has weight W and stands at the center of the plank. If the planes at A and B are smooth, determine the tension in the cord in terms of W and . B