Liquid methanol is pumped from a large storage tank through a 1-in.ID pipe at a rate of 3.00gal/mm. (a) At what rate in (i) ft lb f /s and (ii) hp is kinetic energy being transported by the methanol...

ln 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...

A plane wall ( p = 4000 kg/m 3 , c p = 500 J/kg K, k = 10 W/m K) of thickness L = 20 mm initially has a linear, steady-state temperature distribution with boundaries maintained at T 1 = 0C and T 2...

The temperature of flue gases flowing through the large stack of a boiler is measured by means of a thermocouple enclosed within a cylindrical tube as shown. The tube axis is oriented normal to the...

Friction factor for laminar flow in a slit, use the results of Problem 2B.3 to show that for the laminar flow in a thin slit of thickness 2B the friction factor is f = 12/Re, if the Reynolds number...

One hundred fifty k mol of an aqueous phosphoric acid solution contains 5.00 mole% H3PO4. The solution is concentrated by adding pure phosphoric acid at a rate of 20.0 L/min. (a) Write a differential...

Determine the smallest horizontal force P required to move the wedge to the right. The coefficient of static friction at all contacting surfaces is ? s = 0.3. Set ? = 15 o? and F = 400 N. Neglect the...

Tin is leached (dissolved) into canned foods from the tin-plated steel can.33 For analysis by inductively coupled plasma-atomic emission, food is digested by microwave heating in a Teflon bomb...

A curve in a speed track has a radius of 200 m and a rated speed of 180 km/h. (See Sample Prob. 12.6 for the definition of rated speed.) Knowing that a racing car starts skidding on the curve when...

(a) A three-point transverse bending test is conducted on a cylindrical specimen of aluminum oxide having a reported flexural strength of 390MPa (56,600psi). If the specimen radius is 2.5 mm (0.10...

The system in Fig P6.105 consists of 1200 m of 5 cm cast-iron pipe, two 45° and four 90° flanged long-radius elbows, a fully open flanged globe valve, and a sharp exit into a reservoir. If...

In an enzyme-catalyzed reaction with stoichiometry A B, A is consumed at a rate given by an expression of the MichaelisMenten form: where CA (mol/L) is the reactant concentration, and k1 and k2...

A heat transfer process has the following transfer function between a temperature T and an inlet flow rate q where the time constants have units of minutes: If the flow rate varies sinusoidally with...

An 02-series ball bearing is to be selected to carry a radial load of 8 kN and a thrust load of 4 kN. The desired life LD is to be 5000 h with an inner-ring rotation rate of 900 rev/min. What is the...

A beam AB of mass m and of uniform cross section is suspended from two springs as shown. If spring 2 breaks, determine at that instant (a) The angular acceleration of the beam, (b) The acceleration...

Reconsider Prob. 11-46. Using EES (or other) software, investigate the effect of varying the compressor isentropic efficiency over the range 60 to 100 percent. Plot the power input to the compressor...

A twin-tube, counter flow heat exchanger operates with balanced flow rates of 0.003 kg/s for the hot and cold airstreams. The cold stream enters at 280 K and must be heated to 340 K using hot air at...

Replace the loading by an equivalent resultant force and couple moment acting at point A. Units Used: kN = 103 N Given: w1 600N/m w2 = 600 N/m a = 2.5 m b = 2.5 m B

A very thick slab with thermal diffusivity 5.6 x 10 -6 m 2 /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...

A thin sheet of glass is used on the roof of a greenhouse and is irradiated as shown. The irradiation comprises the total solar flux GS, the flux G aim due to atmospheric emission (sky radiation),...

A mixture of ethanol and benzene is separated in a network of distillation and membrane separation steps. In one intermediate step, a near-azeotropic liquid mixture of 8,000 kg/h of 23 wt% ethanol in...

Wet wood chips are dried in a continues rotary dryer that operates at atmospheric pressure. The chips enter at 19C with a water content of 40 wt% and must leave with a moisture content of less than...

A Carnot heat engine is operating between a source at TH and a sink at TL. If it is desired to double the thermal efficiency of this engine, what should the new source temperature be? Assume the sink...

Determine (a) The distance a so that the vertical reactions at supports A and B are equal, (b) The corresponding reactions at the supports. 120 1 40 lb/ft 12 ft

The heat transfer coefficient for air flowing over a sphere is to be determined by observing the temperature-time history of a sphere fabricated from pure copper. The sphere, which is 12.7 mm in...

A 10.0-mL solution of 0.050 0 M AgNO 3 was titrated with 0.025 0 M NaBr in the cell S.C.E. 7 || titration solution | Ag(s) Find the cell voltage for 0.1 and 30.0 mL of titrant.

In heat treating to harden steel ban bearings (c = 500 J/kg K p = 7800 kg/m3, k = 50 W/m K), it is desirable to increase the surface temperature for a short time without significantly warming the...

Ethylbenzene is converted to styrene in the catalytic dehydrogenation reaction C 8 H 10 (g) ? C 8 H 8 (g) + H 2 : ?H? r (600?C) = +124.5 kJ/mol A flowchart of a simplified version of the commercial...

Air at 4.18 kg/m3 enters a nozzle that has an inlet-to exit area ratio of 2:1 with a velocity of 120 m/s and leaves with a velocity of 380 m/s, determine the density of air at the exit.

One integrated circuit design calls for diffusing boron into very high purity silicon at an elevated temperature. It is necessary that at a distance 0.2 ?m from the surface of the silicon wafer, the...

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

An offset tensile link is shaped to clear an obstruction with a geometry as shown in the figure. The cross section at the critical location is elliptical, with a major axis of 4 in and a minor axis...

An aluminum alloy roller with diameter 1 in and length 2 in rolls on the inside of a cast-iron ring having an inside radius of 4 in, which is 2 in thick. Find the maximum contact force F that can be...

Determine the internal normal force, shear force, and moment acting at point A of the smooth hook. Given: = 45 deg a = 2 in F = 20 lb VA NA 90-0

The magnetic circuit of figure and Problem 1.6 has the following dimensions: Ac = 8.2cm2 lc = 23cm lp = 2.8 cm g = 0.8 mm X0 = 2.5 cm N = 430 turns a. Assuming a constant permeability of ? = 2800?0,...

An air-conditioning system is to take in air at 1 atm, 34C, and 70 percent relative humidity and deliver it at 22C and 50 percent relative humidity. The air flows first over the cooling coils, where...

Consider atmospheric air at u = 2 m/s and T = 300K in parallel flow over an isothermal flat plate of length L = 1 m and temperature Ts = 350 K. (a) Compute the local convection coefficient at the...

When viscous dissipation is included, Equation 8.48 (multiplied by pcp) becomes This problem explores the importance of viscous dissipation. The conditions under consideration are laminar, fully...

Small wheels attached to the ends of rod AB roll along two surfaces. Knowing that at the instant shown the velocity vA of wheel A is 4.5 ft/s to the right and the relative velocity vB/A of wheel B...

The water tank AB has a hemispherical top and is fabricated from thin steel plate. Determine the volume within thetank. 1.6 m 1.5 m 1.6 m 0.2 m

Two rigid tanks are connected by a valve. Tank A contains 0.2 m3 of water at 400 kPa and 80 percent quality. Tank B contains 0.5 m3 of water at 200 kPa and 250oC. The valve is now opened, and the two...

A 3-m3 rigid tank contains hydrogen at 250 kPa and 550 K. The gas is now cooled until its temperature drops to 350 K. Determine (a) The final pressure in the tank and (b) The amount of heat transfer.

The 30-kg turbine disk has a centroidal radius of gyration of 175 mm and is rotating clockwise at a constant rate of 60 rpm when a small blade of mass 51 grams at point A becomes loose and is thrown...

Sphere diameter for a given terminal velocity. (a) Explain how to find the sphere diameter D corresponding to given values of v , p , p s , , and g by making a direct construction on Fig. 6.3-1. (b)...

Consider a flow with a pressure and temperature of 2116 lb/ft2 and 519R, respectively. A Pitot tube is inserted into this flow and measures a pressure of 7712.8 lb/ft2. What is the velocity of this...

A mixture of ethylbenzene (EB) and the three isomers (ortho, meta, and para) of xylene is widely available in petroleum refineries. (a) Based on differences in normal boiling points, verify that the...

Consider an electric motor with a shaft power output of 20 kW and an efficiency of 88 percent. Determine the rate at which the motor dissipates heat to the room it is in when the motor operates at...

The electrolytic membrane of the fuel cell in Example 1.4 is a thin composite structure consisting of sandwiched layers of delicate materials, as shown in the sketch. The thickness of the polymer...

For each of the following functions X(s), what can you say about x(t) (0 6(s + 2) (a) X(s) - G+ 9s + 20)(s + 4) 102 -- 3 (b) X(s) = (2 6s + 10)(s + 2) 16s + 5 (c) X(s) = + 9

Air at 800 kPa and 400C enters a steady-flow nozzle with a low velocity and leaves at 100 kPa. If the air undergoes an adiabatic expansion process through the nozzle, what is the maximum velocity of...

The tongs shown are used to apply a total upward force of 45Kn on a pipe cap. Determine the forces exerted at D and F on tong ADF. 25 mm $5 mm 75 mm 90 mun

Liquid oxygen, which has a boiling point of 90 K and a latent heat of vaporization of 214kJ/kg, is stored in a spherical container whose outer surface is of 500-mm diameter and at a temperature of -...

Consider cross flow of gas X over an object having a characteristic length of L = 0.1 m. For a Reynolds number of I x 104, the average heat transfer coefficient is 25 W/m2 K. The same object is then...

During a winter day, the window of a patio door with a height of 1.8 m and width of 1.0 m shows a frost line near its base. The room wall and air temperatures are 15C. (a) Explain why the window...

Briefly describe the simplest heat treatment procedure that would be used in converting a 0.76 wt% C steel from one microstructure to the other, as follows: (a) Spheroidite to tempered martensite (b)...

Soda and lime are added to a glass batch in the form of soda ash (Na2CO3) and limestone (CaCO3). During heating, these two ingredients decompose to give off carbon dioxide (CO2), the resulting...

An exothermic reaction, A ? 213, takes place adiabatically in a stirred-tank reactor. This liquid reaction occurs at constant volume in a 1000-gal reactor. The reaction can be considered to he first...

A pistoncylinder device, with a set of stops on the top, initially contains 3 kg of air at 200 kPa and 27C. Heat is now transferred to the air, and the piston rises until it hits the stops, at which...

A device that recovers heat from high-temperature combustion products involves passing the combustion gas between parallel plates, each of which is maintained at 350 K by water flow on the opposite...

A dynamic model of the stirred-tank heating system in Fig was derived in Chapter 6. Use this model to do the following: (a) Derive an expression for the relative gain array. (b) Design art ideal...

Limestone (CaCO3) decomposes upon heating to yield quicklime (CaO) and carbon dioxide. At what temperature is the decomposition pressure of limestone l(atm)?

Two coils, one mounted on a stator and the other on a rotor, have self- and mutual inductances of L11 = 3.5mH L22 = 1.8mH L12 = 2.1cos mH where is the angle between the axes of the coils. The coils...

The acceleration of high-speed aircraft is sometimes expressed in gs (in multiples of the standard acceleration of gravity). Determine the upward force, in N, that a 90-kg man would experience in an...

A heat pump using refrigerant-134a heats a house by using underground water at 8C as the heat source. The house is losing heat at a rate of 60,000 kJ/h. The refrigerant enters the compressor at 280...

One modality for destroying malignant tissue involves imbedding a small spherical heat source of radius ro within the tissue and maintaining local temperatures above a critical value Tc for an...

In a test to determine the friction coefficient, , associated with a disk brake, one disk and its shaft are rotated at a constant angular velocity w, while an equivalent disk/shaft assembly is...

A 25-kg block A rests on an inclined surface, and a 15-kg counterweight B is attached to a cable as shown. Neglecting friction, determine the acceleration of A and the tension in the cable...

Liquid oxygen is stored in a thin-walled, spherical container 0.8 m in diameter, which is enclosed within a second thin-walled, spherical container 1.2 m in diameter. The opaque, diffuse, gray...

Silver ion in methanol was exchanged with sodium ion using Dowex 50 cross-linked with 8% divinyl benzene by Gable and Stroebel [J. Phys. Chem., 60, 513-517 (1956)]. The molar selectivity coefficient...

For each of the following assets, assign a low, moderate, or high impact level for the loss of confidentiality, availability, and integrity, respectively. Justify your answers. a. An organization...

Using the method of joints, determine the force in each member of the truss shown. State whether each member is in tension or compression. 375 th 500 Ib 6 ft 84 ft

A beverage can with a diameter of 65 mm and a height of 120 mm has a uniform temperature of 5C when it is removed from the refrigerator. The can is set on a table in a room with an ambient air...

Use the ideal gas equation of state to estimate the molar volume in m3tmol and the density of air in kg/m 3 at 40C and a gauge pressure of 3.0atm.

An apparatus commonly used for measuring the reflectivity of materials is shown below. A water-cooled sample, of 30-mm diameter and temperature Ts = 300 K, is mounted flush with the inner surface of...

A tool for processing silicon wafers is housed within a vacuum chamber whose walls are black and maintained by a coolant at T vc = 300 K. The thin silicon wafer is mounted close to, but not touching,...

(a) For the cascade shown in Figure a, calculate the compositions of streams V4 and L1. Assume atmospheric pressure, saturated liquid and vapor feeds, and the vapor-liquid equilibrium data given...

If a force of F = 50 N acts on the rope, determine the cutting force on the smooth tree limb at D and the horizontal and vertical components of force acting on pin A. The rope passes through a small...

Determine the x, y, z components of reaction at the pin A and the tension in the cable BC necessary for equilibrium of the rod. Given: F = 350 lb e = 12 ft a = 4 ftf = 4 ft b = 5 ft g = 10 ft c = 4...

Consider the velocity boundary layer profile for flow over a flat plate to be of the form u = C1 + C2y. Applying appropriate boundary conditions, obtain an expression for the velocity profile in...

A solar water heater consists of a flat-plate collector that is coupled to a storage tank. The collector consists of a transparent cover plate and an absorber plate that are separated by an air gap....

Consider a very long, concentric tube heat exchanger having hot and cold water inlet temperatures of 85 and 15C. The flow rate of the hot water is twice that of the cold water. Assuming equivalent...

For each beam illustrated in the figure, find the locations and magnitudes of the maximum tensile bending stress and the maximum shear stress due to V.

Complete this table for refrigerant-134a: T,ORkPa u, kJ/kg Phase description 95 20 -12 Saturated liquid 400 8 600 300

Three spheres, each of mass m, can slide freely on a frictionless, horizontal surface. Spheres A and B are attached to an inextensible, inelastic cord of length l and are at rest in the position...

One hundred kilomoles of a feed composed of 25 mol% n-butane, 40 mol% n-pentane, and 35 mol% n-hexane are flashed at steady-state conditions. If 80% of the hexane is to be recovered in the liquid at...

The figure illustrates the connection of a steel cylinder head to a grade 30 cast-iron pressure vessel using N bolts. A confined gasket seal has an effective sealing diameter D. The cylinder stores...

A thermal storage medium consists of a large mass of limestone. Ambient air is pumped through a 30-mm-high, 5-m-long 5-m-wide fissure within the limestone at a velocity of 2m/s. providing a heat...

Neglecting friction, determine the tension in cable ABD and the reaction at C when = 60 o .

During a hot summer day at the beach when the air temperature is 30C, someone claims the vapor pressure in the air to be 5.2 kPa. Is this claim reasonable?

A square aluminum plate 5 mm thick and 200 mm on a side is heated while vertically suspended in quiescent air at 40C. Determine the average heat transfer coefficient for the plate when its...

Consider steady, parallel flow of atmospheric air over a flat plate. The air has a temperature and free stream velocity of 300 K 25 m/s? (a) Evaluate the boundary layer thickness at distances of x =...

Determine the location yc of the centroid of the beam's cross-sectional area. Neglect the size of the corner welds at A and B for the calculation. Given: d1 = 50 mm d2 = 35 mm h = 110 mm t = 15 mm

Plasma spray-coating processes are often used to provide surface protection for materials exposed to hostile environments, which induce degradation through factors such as wear, corrosion, or...

A solution of sugar in water is to be concentrated from 5 wt% sugar to 20% sugar. The solution is at about 45?C when it is fed continuously to a bubble column. Air at 45?C with a dew point of 4?C is...

The ends of a cylindrical rod 6.4 mm (0.25 in.) in diameter and 250 mm (10 in.) long are mounted between rigid supports. The rod is stress free at room temperature [20(C (68(F)]; and upon cooling to...

Methane is compressed adiabatically by a steady-flow compressor from 2 MPa and -10°C to 10 MPa and 110°C at a rate of 0.55 kg/s. Using the generalized charts, determine the required power...

A horizontal electrical cable of 25-mm diameter has a heat dissipation rate of 30 W/m. If the ambient air temperature is 27C, estimate the surface temperature of the cable.

Steam at 6000 kPa and 500C enters a steady-flow turbine. The steam expands in the turbine while doing work until the pressure is 1000 kPa. When the pressure is 1000 kPa, 10 percent of the steam is...

The mechanism shown is one of two identical mechanisms attached to the two sides of a 90-kg uniform rectangular door. Edge ABC of the door is guided by wheels of negligible mass that roll in...

Steam produced in a boiler is frequently wetthat is. it is a mist composed of saturated water vapor and entrained liquid droplets. The quality of a wet steam is defined as the fraction of the mixture...