Acetaldehyde is synthesized by the catalytic dehydrogenization of ethanol: C 2 H 5 OH ? CH 3 CHO + H 2? Fresh feed (pure ethanol) is blended with a recycle stream (95 mole% ethanol and 5%...

A single-pass, cross-flow heat exchanger uses hot exhaust gases (mixed) to heat water (unmixed) from 30 to 80C at a rate of 3 kg/s. The exhaust gases, having thermo physical properties similar to...

The two-winding magnetic circuit of figure has a winding on a fixed yoke and a second winding on a moveable element. The moveable element is constrained to motion such that the lengths of both air...

A geothermal pump is used to pump brine whose density is 1050 kg/m3 at a rate of 0.3 m3/s from a depth of 200 m, For a pump efficiency of 74 percent, determine the required power input to the pump....

Suppose you pour a gallon of water on a yowling cat 10 ft below your bedroom window. (a) How much potential energy (ft 1bf) does the water lose? (b) How fast is the water traveling (ft/s) just...

The parallel galvanized-iron pipe system of Fig P6.113 delivers water at 20°C with a total flow rate of 0.036 m3/s. If the pump is wide open and not running, with a loss coefficient K = 1.5,...

An 8-oz package is projected upward with a velocity v0 by a spring at A; it moves around a frictionless loop and is deposited at C. For each of the two loops shown, determine (a) The smallest...

The angular acceleration of an oscillating disk is defined by the relation = k. Determine (a) The value of k for which = 12 rad/s when = 0 and = 6 rad when = 0, (b) The angular velocity of the...

You have purchased a gas cylinder that is supposed to contain 5.0 mole% Cl2 ( 0.1%) and 95% air. The experiments you have been running are not giving reasonable results, and you suspect that the...

Consider a random process X (t) defined by X (t) = sin (2fct), in which the frequency f c is a random variable uniformly distributed over the interval [0, W]. Show that X (t) is non-stationary

A band belt is used to control the speed of a flywheel as shown. Determine the magnitude of the couple being applied to the flywheel knowing that the coefficient of kinetic friction between the belt...

A streamlined strut supporting a bearing housing is exposed to a hot airflow from an engine exhaust. It is necessary to run experiments to determine the average convection heat transfer coefficient h...

Suppose that an HPLC column produces Gaussian peaks. The detector measures absorbance at 254 nm. A sample containing equal moles of compounds A and B was injected into the column. Compound A (254] =...

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...

Estimate the remaining life in revolutions of an 02-30 mm angular-contact ball bearing already subjected to 200 000 revolutions with a radial load of 18 kN, if it is now to be subjected to a change...

Repeat Prob. 51 for a bar of AISI 1018 hot-rolled steel and: (a) A = 100 MPa, B = 80 MPa (b) A = 100 MPa, B = 10 MPa (c) A = 100 MPa, B = 80 MPa (d) A = 80 MPa, B = 100 MPa

One thousand kg of natural gas at 100 bar and 255 K is stored in tank. If the pressure, , specific volume, , and temperature, T, of the gas are related by following expression = [(5.18 10-3) T/ ( ...

Using nodal analysis, find Vo in the network infigure. 2 kN kf! 4 kll Vo 6 kn 2 mA 6 V Q+

At 45oC, 5,000 kg/h of a mixture of 65 wt% docosane, 7 wt% furfural, and 28 wt% diphenylhexane is to be extracted with pure furfural to obtain a raffinate with 12 wt% diphenylhexane in a continuous,...

A 0.35-m3 vessel holds ethane vapor at 25(C and 2,200 kPa. If it is heated to 220(C. what pressure is developed?

Velocity distribution in turbulent pipe flow water is flowing through a long, straight, level run of smooth 6.00 in. i.d. pipe, at a temperature of 68 o F. The pressure gradient length of the pipe is...

Assume that we are in another universe with different physical laws. Electrons in this universe are described by four quantum numbers with meanings similar to those we use. We will call these quantum...

A building window pane that is 1.2 m high and 0.8 m wide is separated from the ambient air by a storm window of the same height and width. The air space between the two windows is 0.06 m thick. If...

Briefly explain why, for a small anode-to-cathode area ratio, the corrosion rate will be higher than for a large ratio.

For the wire form shown, determine the deflection of point A in the y direction. Assume R/h > 10 and consider the effects of bending and torsion only. The wire is steel with E = 200 GPa, ν = 0.29,...

A container equipped with a resistance heater and a mixer is initially filled with 3.6 kg of saturated water vapor at 120C. Now the heater and the mixer are turned on; the steam is compressed, and...

A 180-lb man and a 120-lb woman stand at opposite ends of a 300-lb boat, ready to dive, each with a 16-ft/s velocity relative to the boat. Determine the velocity of the boat after they have both...

Cold air at 20F, 760 mm Hg pressure and 70% relative humidity is conditioned by being passed through a bank of heatin2 coils, then through a water spray and finally through a second set of heating...

A 60-hp four-cylinder internal combustion engine is used to drive a brick-making machine under a schedule of two shifts per day. The drive consists of two 26-in sheaves spaced about 12 ft apart, with...

The area shown is revolved about the x axis to form a homogeneous solid of revolution of mass m. Determine by direct integration the mass moment of inertia of the solid with respect to (a) The x...

Limiting local Nusselt number for plug flow with constant heat flux (a) Equation 10B.9-1 gives the asymptotic temperature distribution for cooling a fluid of constant physical properties in plug flow...

Benzene and hexane are being considered as solvents to extract acetic acid from aqueous mixtures. At 30C, distribution coefficients for the two solvents are K B = 0.098 mass fraction acetic acid in...

The spectral absorptivity of a large diffuse surface is ? ? = 0.9 for A ? = 0.3 for ? > 1?m. The bottom of the surface is well insulated while the top may be exposed to one of two different...

(a) Calculate the heat flux through a sheet of steel 10 mm (0.39 in.) thick if the temperatures at the two faces are 300 and 100C (572 and 212F); assume steady-state heat flow. (b) What is the heat...

The following data were obtained when a Ca 2+ ion-selective electrode was immersed in standard solutions whose ionic strength was constant at 2.0 M. (a) Prepare a calibration curve and find the...

For the network of Fig. 2.165, sketch vo and determine Vdc. 2.2 k V110 V (rms) IdelV

Approximations to Planck's law for the spectral emissive power are the Wien and Rayleigh-Jeans spectral distributions, which are useful for the extreme low and high limits of the product ?T,...

Calculate the voltage gain of each stage and the overall ac voltage gain for the BJT cascade amplifier circuit of Fig. 5.176. +15 V 5.1 kQ 24 k 5.1 k 24 k2 0.5 HF If 0.5 pF - 150 6.2 k2 6.2 kQ 50 uF

A heat pump with a COP of 2.4 is used to heat a house. When running, the heat pump consumes 8 kW of electric power. If the house is losing heat to the outside at an average rate of 40,000 kJ/h and...

A 360-lb motor is bolted to a light horizontal beam. The unbalance of its rotor is equivalent to a 0.9-oz weight located 7.5 in. from the axis of rotation, and the static deflection of the beam due...

Find the power absorbed by the network shown. 21 V 12 k 18 k

The pressure gauge on a 20.0 m3 tank of nitrogen at 25C reads 10bar. Estimate the mass of nitrogen in the tank by (a) Direct solution of the ideal gas equation of state and (b) Conversion from...

A liquid-phase chemical reaction with stoichiometry A B takes place in a semi batch reactor. The rate of consumption of A per unit volume of the reactor contents is given by the first-order rate...

Using superposition, find the deflection of the steel shaft at A in the figure. Find the deflection at midspan. By what percentage do these two valuesdiffer? 24 in 340 lbf 150 lbf/ft 1.5 in-dia. shaft

Solve Prob. 442 using Castiglianos theorem. Prob. 442, For the cantilevered handle in Prob. 441, let Fx = 150 lbf, Fy = 0 lbf, Fz = 100 lbf. Find the deflection at the tip along the x axis. In Prob....

A load Q is applied to the pulley C, which can roll on the cable ACB. The pulley is held in the position shown by a second cable CAD, which passes over the pulley A and supports a load P. Knowing...

A boat is moving to the right with a constant deceleration of 0.3 m/s2 when a boy standing on the deck D throws a ball with an initial velocity relative to the deck which is vertical. The ball rises...

A computer tape moves over the two drums shown. Drum A weighs 1.4 lb and has a radius of gyration of 0.75 in., while drum B weighs 3.5 lb and has a radius of gyration of 1.25 in. In the lower portion...

Phosgene (CC1 2 O) is a colorless gas that was used as an agent of chemical warfare in World War I. It has the odor of newly mown hay (which is a good warning if you know the smell of newly mown...

Repeat Prob. 54 by first plotting the failure loci in the A , B plane to scale; then, for each stress state, plot the load line and by graphical measurement estimate the factors of safety.

Determine (a) The distance a so that the vertical reaction at support B is minimum, (b) The corresponding reactions at the supports. 120 l/ft 40 lb/ft -12ft-

Consider a flat plate at an angle of attack a to a Mach 2.4 airflow at 1atm pressure. What is the maximum pressure that can occur on the plate surface and still have an attached shock wave at the...

Activity problem. Citric acid is a triprotic acid (H 3 A) whose anion (A 3- ) forms stable complexes with many metal ions. When a Ca 2+ ion-selective electrode with a slope of 29.58 mV was immersed...

A scheme for concurrently heating separate water and air streams involves passing them through and over an array of tubes, respectively, while the tube wall is heated electrically. To enhance...

Knowing that P = 210 N, replace the three couples with a single equivalent couple, specifying its magnitude and the direction of its axis.

Gold forms a substitutional solid solution with silver. Compute the number of gold atoms per cubic centimeter for a silver-gold alloy that contains 10 wt% Au and 90 wt% Ag. The densities of pure gold...

The one-dimensional system of mass M with constant properties and no internal heat generation shown in the figure is initially at a uniform temperature T i . The electrical heater is suddenly...

The three outer blocks each have a mass of 2 kg, and the central block E has a mass of 3 kg. Determine the sag s for equilibrium of thesystem. 30 1m Mc

A refrigerator uses refrigerant-134a as the working fluid and operates on the ideal vapor-compression refrigeration cycle. The refrigerant enters the evaporator at 120 kPa with a quality of 30...

Determine by direct integration the centroid of the area shown. Express your answer in terms of a and b. y=

Determine the horizontal and vertical components of force that the pins A and B exert on the two-member frame. Given: w = 400 N/m a = 1.5 m b = 1 m c = 1 m F = 0 N = 60 deg B w

A thin, flat plate that is 0.2 m by 0.2 m on a side with extremely rough top and bottom surfaces is placed in a wind tunnel so that its surfaces are parallel to an atmospheric air stream having a...

Spectroscopic data for the indicators thymol blue (TB), semithymol blue (STB), and methylthymol blue (MTB) are shown in the table. A solution of TB, STB, and MTB in a 1.000-cm cuvet had absorbances...

For the frame and loading shown, determine the components of all forces acting on member ABCD. S0 mm 200 mm S0 mm 100 mn 150 mm 4. 45 IS0 N

Determine the reactions at the beam supports for the given loading. 2 kN/m B. 2.5 kN/m -1.2 m 1.8 m

Two discrete-time systems T1 and T2 are connected in cascade to form a new system T as shown in figure. Prove or disprove the following statements. (a) If T1 and T2 are linear, than T is linear...

(a) Find an expression for the amount of derivative kick that wilt bc applied to the process when using the position form of the PID digital algorithm (Eq. 8-26) if a step set-point change of...

A hygrometer is used to measure the moisture content of humid air. Calibration of the instrument leads to a straight line on a semi log plot of y, the mole fraction of water in air (logarithmic...

A cubical glass melting furnace has exterior dimensions of width W = 5 m on a side and is constructed from refractory brick of thickness L = 0.35 m and thermal conductivity k = 1.4 W/m. K. The sides...

The pressure upstream of a normal shock wave is 1 atm. The pressure and temperature downstream of the wave are 10.33atm and 1390R, respectively. Calculate the Mach number and temperature upstream of...

The shaft shown in the figure carries a 20-lbf gear on the left and a 35-lbf gear on the right. Estimate the first critical speed due to the loads, the shafts critical speed without the loads, and...

A utility hook was formed from a 1-in-diameter round rod into the geometry shown in the figure. What are the stresses at the inner and outer surfaces at section A-A if the load F is 1000 lbf? in 10...

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...

A transistor, which may be approximated as a hemispherical heat source of radius r 0 = 0.1 mm. is embedded in a large silicon substrate (k = 125 W/m K) and dissipates heat at a rate q. All...

Liquid hydrazine (SO = 0.82) undergoes a family of decomposition reactions that can be represented by the stoichiometric expression 3 N 2 H 4 6x H 2 + (1 + 2x) N 2 + (4 4x) NH 3 (a) For what range...

A porous-glass membrane, with an average pore diameter of 40 a, is to be used to separate light gases at 25 o C under conditions where Knudsen flow may be dominant. The downstream pressure is 15...

If the resultant force acting on the bracket is FR = {? 300i + 650j + 250k} N, determine the magnitude and coordinate direction angles of F. 45 30- F= 750 N

The reaction between potassium superoxide, KO2, and CO2, 4 KO2 + 2 CO2 2K2CO3 + 3 O2 is used as a source of O2 and absorber of CO2 in self-contained breathing equipment used by rescue workers. (a)...

The lives of parts are often expressed as the number of cycles of operation that a specified percentage of a population will exceed before experiencing failure. The symbol L is used to designate this...

During some actual expansion and compression processes in pistoncylinder devices, the gases have been observed to satisfy the relationship PVn = C, where n and C are constants. Calculate the work...

A stream of refrigerant-134a at 1 MPa and 12C is mixed with another stream at 1 MPa and 60C. If the mass flow rate of the cold stream is twice that of the hot one, determine the temperature and the...

A shell-and-tube exchanger (two shells, four tube passes) is used to heat 10,000 kg/h of pressurized water from 35 to 120C with 5000 kg/h pressurized water entering the exchanger at 300C. If the...

Two friction disks A and B are to be brought into contact without slipping when the angular velocity of disk A is 240 rpm counterclockwise. Disk A starts from rest at time t = 0 and is given a...

An object whose mass is 300 lb experience changes in its kinetic and potential energies owing to the action of a resultant force R. the work done on the object by the resultant force is 140 Btu....

A photovoltaic solar panel consists of a sandwich of (top to bottom) a 3-mm-thick ceria-doped glass (kg = 1.4 W/m K), a 0.1-mm-thick optical grade adhesive (ka = 145 W/m K), a very thin silicon...

A gas-turbine plant operates on the regenerative Brayton cycle with two stages of reheating and two-stages of intercooling between the pressure limits of 100 and 1200 kPa. The working fluid is air....

A thermosyphon consists of a closed container that absorbs heat along its boiling section and rejects heat along its condensation section. Consider a thermosyphon made from a thin-walled mechanically...

Spray cooling is a technique for cooling and either humidifying or dehumidifying air by contacting it with a liquid water spray. The liquid water leaving the tower is re-circulated and, in the case...

The drum has a weight of 100 lb and rests on the floor for which the coefficient of static friction is ? s = 0.6. If a = 2 ft and b = 3 ft, determine the smallest magnitude of the force P that will...

A small atomic bomb releases energy equivalent to the detonation of 20,000 tons of TNT; a ton of TNT releases 4 X 109 J of energy when exploded. Using 2 X 1013 J/mol as the energy released by fission...

A rigid, nonconducting tank with a volume of 4 m3 is divided into two unequal parts by a thin membrane. One side of the membrane, representing 1/3 of the tank, contains nitrogen gas at 6 bar and...

The Chicago North Shore & Milwaukee Railroad was an electric railway running between the cities in its corporate title. It had passenger cars as shown in the figure, which weighed 104.4 kip, had...

Thermal conductivity and Prandtl number of a polyatomic gas. (a) Estimate the thermal conductivity of CH 4 at 1500K and 1.37 atm. The molar heat capacity at constant pressure 4 at 1500K is 20.71...

A solid round steel bar is machined to a diameter of 1.25 in. A groove 1/8 in deep with a radius of 1/8 in is cut into the bar. The material has a mean tensile strength of 110 kpsi. A completely...

A window awning is fabricated from sheet metal of uniform thickness. Locate the center of gravity of the awning.

An open vessel containing 0.205lbm of liquid water is placed in an empty room 5 ft wide. 4 ft deep and 7 ft high which initially contains dry air at 90F all the water evaporates without changing the...

An iron bar 2.00 cm x 3.00 cm x 10.0 cm at a temperature of 95C is dropped into a barrel of water at 25C. The barrel is large enough so that the water temperature rises negligibly as the bar cools....

Radiation leaves a furnace of inside surface temperature 1500 K through an aperture 20 mm in diameter. A portion of the radiation is intercepted by a detector that is 1 m from the aperture, has a...

Consider a sphere of radius R immersed in a uniform stream Uo, as shown in Fig. P4.7. According to the theory of Chap. 8, the fluid velocity along streamline AB is given by v = ui = Uo (1+R3/x3) i...

If the resultant couple of the three couples acting on the triangular block is to be zero, determine the magnitude of forces F and P. Given: F1 = 150 N a = 300 mm b = 400 mm d = 600 mm -F -P b-