A shell-and-tube heat exchanger consisting of one shell pass and two tube passes is used to transfer heat from an ethylene glycol-water solution (shell side) supplied from a rooftop solar collector...

A cryogenic fluid flows through a tube 20 mm in diameter, the outer surface of which is diffuse and gray with an emissivity of 0.02 and temperature of 77 K. This tube is concentric with a larger tube...

A fluidized-bed dryer is to be sized to dry 5,000 kg/h (dry basis) of spherical polymer beads that are closely sized to 1 mm in diameter. The beads will enter the dryer at 25C with a moisture content...

The figure illustrates a number of beam sections. Use an allowable bending stress of 1.2 kpsi for wood and 12 kpsi for steel and find the maximum safe uniformly distributed load that each beam can...

A rigid tank is divided into two rooms by a membrane, both containing water, shown in Fig. P5.58. Room A is at 200 kPa, v = 0.5 m3/kg, VA = 1 m3, and room B contains 3.5 kg at 0.5 MPa, 400C. The...

An airplane has a mass of 5000 kg, a maximum thrust of 7000 N, and a rectangular wing with aspect ratio 6.0. It takes off at sea level with a 60 split flap as in Fig. 7.25. Assume all lift and drag...

Shown is the cross section of a molded flat-belt pulley. Determine its mass moment of inertia and its radius of gyration with respect to the axis AA. (The specific weight of brass is 0.306 lb/in3 and...

The 5-in.-radius drum rolls without slipping on a portion of a belt which moves downward to the left with a constant velocity of 6 in./s. Knowing that at a given instant the velocity and acceleration...

Gear C has a mass of 5 kg and a centroidal radius of gyration of 75 mm. The uniform bar AB has a mass of 3 kg and gear D is stationary. If the system is released from rest in the position shown,...

An unknown solid is entirely soluble in water. On addition of dilute HCl, a precipitate forms. After the precipitate is filtered off, the pH is adjusted to about 1 and H2S is bubbled in; a...

A bicycle tire is filled with air at 169.12 kPa (abs) and 30C. The valve breaks, and air exhausts into the atmosphere of 100 kPa (abs) and 20C. The valve exit is 2-mmdiameter and is the smallest area...

A steam power plant operates on a simple ideal Rankine cycle between the pressure limits of 3 MPa and 50 kPa. The temperature of the steam at the turbine inlet is 300C, and the mass flow rate of...

The distribution coefficient of styrene distributed between ethylbenzene and ethylene glycol at 25C is 0.19mass fraction in the ethylene glycol phase per mass fraction in the ethylbenzene phase. One...

Determine the internal normal force, shear force, and moment acting at point C and at point D, which is coated just to the right of the roller support atB. 300 Ib/f 200 Ib/ft 200 Ib/ft 4 ft 4 ft -4...

Determine the phase condition of a stream having the following composition at 7.2oC and 2,620 kPa.Perform the calculations with a computer simulation program using at least three different options...

A heat pump supplies heat energy to a house at the rate of 140,000 kJ/h when the house is maintained at 25C. Over a period of one month, the heat pump operates for 100 hours to transfer energy from a...

The 100-mm-radius brake drum is attached to a flywheel which is not shown. The drum and flywheel together have a mass of 300 kg and a radius of gyration of 600 mm. The coefficient of kinetic friction...

A 1.4-kg block is supported as shown by a spring of constant k = 400 N/m which can act in tension or compression. The block is in its equilibrium position when it is struck from below by a hammer...

Suppose processes P 0 and P 1 share variable V 2 , processes P 1 and P 2 share variable V 0 , and processes P 2 and P 3 share variable V 1 . In addition, P 0 , P 1 , and P 2 run concurrently. Write a...

After a long walk in the 8C outdoors, a person wearing glasses enters a room at 25C and 40 percent relative humidity. Determine whether the glasses will become fogged.

When a particle with charge q and mass m is introduced into a medium with a uniform field B such that the initial velocity of the particle u is perpendicular to B, as shown in Fig. 5-31 (P5.2), the...

Locate the center of gravity xc of the homogeneous rod. If the rod has a weight per unit length , determine the vertical reaction at A and the x and y components of reaction at the pin B. Given: =...

The 200-mm-radius brake drum is attached to a larger flywheel that is not shown. The total mass moment of inertia of the flywheel and drum is 19 kg ?? m2 and the coefficient of kinetic friction...

The rat trap shown in the figure uses two opposite-image torsion springs. The wire has a diameter of 0.081 in, and the outside diameter of the spring in the position shown is in. Each spring has 11...

A 0.04-m3 tank initially contains air at ambient conditions of 100 kPa and 22°C. Now, a 15-liter tank containing liquid water at 85°C is placed into the tank without causing any air to...

Determine the force in members IL, GJ, and HK of the truss shown. 1.2AN 1iN IG 16m 1im 16 m L6m 1.6 16 D

The rotor of an electric motor has an angular velocity of 3600 rpm when the load and power are cut off. The 110-lb rotor, which has a centroidal radius of gyration of 9 in., then coasts to rest....

An aqueous acetic-acid solution containing 6.0 moles of acid per liter is to be extracted in the laboratory with chloroform at 25oC to recover the acid (B) from chloroform-insoluble impurities...

A mixture of ethylene and ethane is to be separated by distillation. Determine the maximum operating pressure of the column. What operating pressure would you suggest? Why?

A 0.9-m3 rigid tank is divided into two equal compartments by a partition. One compartment contains Ne at 20C and 100 kPa, and the other compartment contains Ar at 50C and 200 kPa. Now the partition...

Octane gas (C8H18) at 25C is burned steadily with 30 percent excess air at 25C, 1 atm, and 60 percent relative humidity. Assuming combustion is complete and the products leave the combustion chamber...

Calculate the line parameters R`, L` G`, and C` for a coaxial line with an inner conductor diameter of 0.5 cm and an outer conductor diameter of 1 cm, filled with an insulating material where = 0, r...

Consider Problem 4.5 for the case where the plate is of square cross section, W = L. (a) Derive an expression for the shape factor, Smax associated with the maximum top surface temperature, such that...

A 200-mm-square, 10-mm-thick tile has the thermo physical properties of pyrex ( = 0.80) and emerges from a curing process at an initial temperature of T i = 140C. The backside of the tile is...

Use data in Table B.2 to calculate the following: (a) The heat capacity (Cp) of liquid benzene at 40C. (b) The heat capacity at constant pressure of benzene vapor at 40C. (c) The heat capacity at...

For a bolted assembly with six bolts, the stiffness of each bolt is kb = 3 Mlbf/in and the stiffness of the members is km = 12 Mlbf/in per bolt. An external load of 80 kips is applied to the entire...

Approximately 150SCFM (standard cubic feet per minute) of nitrogen is required by a process facility. As shown in the diagram below, plans call for supplying the facility from a tank of liquid...

Determine the indices for the directions shown in the following cubic unitcell: B. +x

The drum for the band brake in Prob. 1611 is 300 mm in diameter. The band selected has a mean coefficient of friction of 0.28 and a width of 80 mm. It can safely support a tension of 7.6 kN. If the...

Find the current Ix in the 4-ohm resistor in the circuit shown. 12 3 6 4 2A

A 0.12-m3 rigid tank initially contains refrigerant- 134a at 1 MPa and 100 percent quality. The tank is connected by a valve to a supply line that carries refrigerant-134a at 1.2 MPa and 36C. Now the...

An ideal Brayton cycle with regeneration has a pressure ratio of 10. Air enters the compressor at 300 K and the turbine at 1200 K. If the effectiveness of the regenerator is 100 percent, determine...

The uniform crate of mass M is suspended by using a cord of length l that is attached to the sides of the crate and passes over the small pulley at O. If the cord can be attached at either points A...

A half cylinder of mass m is released from rest in the position shown and swings freely about the horizontal diameter AB. Determine, at this instant, (a) The acceleration of point D, (b) The...

Zinc telluride has a band gap of 2.26 eV. Over what range of wavelengths of visible light is it transparent?

The dynamic model between an output variable y and an input variable u can be expressed by (a) Will this system exhibit an oscillatory response after an arbitrary change in u? (b) What is the...

A 6-lb shell moving with a velocity ?? v0k explodes at point D into three fragments which hit the vertical wall at the points indicated. Fragments A, B, and C hit the wall 0.010 s, 0.018 s, and 0.012...

A chain is looped around two gears of radius 2 in. that can rotate freely with respect to the 16-in. arm AB. The chain moves about arm AB in a clockwise direction at the constant rate of 4 in./s...

One scheme for extending the operation of gas turbine blades to higher temperatures involves applying a ceramic coating to the surfaces of blades fabricated from a super alloy such as inconel. To...

Liquid air is fed to the top of a perforated-tray reboiled stripper operated at substantially atmospheric pressure. Sixty percent of the oxygen in the feed is to be drawn off in the bottoms vapor...

A solution is 0.200 M in Co2+ and 0.0650 M in Cd2+. Calculate (a) The Co2+ concentration in the solution as the first cadmium starts to deposit. (b) The cathode potential needed to lower the Co2+...

A helical coil compression spring is needed for food service machinery. The load varies from a minimum of 4 lbf to a maximum of 18 lbf. The spring rate k is to be 9.5 lbf/in. The outside diameter of...

Incompressible steady flow in the inlet between parallel plates in Fig P3.17 is uniform, u = Uo = 8 cm/s, while downstream the flow develops into the parabolic laminar profile u = az (zo − z),...

Knowing that α =65°, determine the resultant of the three forces shown. 400 N 600 N 300 N 20

Two L127 Ã 76 Ã 12.7-mm angles are welded to a 10-mm steel plate. Determine the distance b and the centroidal moments of inertia Ix and Iy of the combined section knowing that Iy= 3Ix....

A drum of 80-mm radius is attached to a disk of 160-mm radius. The disk and drum have a combined mass of 5 kg and combined radius of gyration of 120 mm. A cord is attached as shown and pulled with a...

A -in-diameter steel tension rod is 72 in long and carries a load of 2000 lbf. Find the tensile stress, the total deformation, the unit strains, and the change in the rod diameter.

A homeowner is considering these heating systems for heating his house: Electric resistance heating with $0.09/kWh and 1 kWh = 3600 kJ, gas heating with $1.24/therm and 1 therm = 105,500 kJ, and oil...

An insulated pistoncylinder device contains 100 L of air at 400 kPa and 25C. A paddle wheel within the cylinder is rotated until 15 kJ of work is done on the air while the pressure is held constant....

A 2.9-lb force P is applied to the lever which controls the auger of a snow blower. Determine the value of α knowing that the moment of P about A is counterclockwise and has a magnitude of 17...

On a summer day the air temperature is 27C and the relative humidity is 30%. Water evaporates from the surface of a lake at a rate of 0.10 kg/h per square meter of water surface area. The temperature...

The angular acceleration of a shaft is defined by the relation = 0.5, where is expressed in rad/s2 and in rad/s. Knowing that at t = 0 the angular velocity of the shaft is 30 rad/s, determine (a)...

Hydrogen gas is used in a process to manufacture a sheet material of 6-mm thickness. At the end of the process, H2 remains in solution in the material with a uniform concentration of 320 k mol/m3. To...

Water is to be used in a single equilibrium stage to dissolve 1,350 kg/h of Na2CO3 from 3,750 kg/h of a solid, where the balance is an insoluble oxide. If 4,000 kg/h of water is used and the...

An industrial process involves evaporation of a thin water film from a contoured surface by heating it from below and forcing air across it. Laboratory measurements for this surface have provided the...

For the system of particles of Prob. 14.13, determine (a) The position vector r of the mass center G of the system, (b) The linear momentum mv of the system, (c) The angular momentum HG of the system...

The three-stage extractor shown in Figure 8.44 is used to extract the arnine from a fluid consisting of 40 wt% benzene (B) and 60 wt% trimethylamine (T). The solvent (water) flow to stage 3 is 5,185...

Approximate the human form as an unclothed vertical cylinder of O.3-m diameter and 1.75-m length with a surface temperature of 30C. (a) Calculate the heat loss in a 10-m/s wind at 20C. (b) What is...

The use of rock pile thermal energy storage systems has been considered for solar energy and industrial process heat applications. A particular system involves a cylindrical container, 2 m long by 1...

Exercise 1.7 shows two possible ways to design a feedback control loop to obtain a desired rate of liquid flow, wxp. Assume that in both Systems I and II, the flow transmitter is direct acting (i.e.,...

Spring CD remains in the horizontal position at all times due to the roller at D. If the spring is unstretched when ? = 0 o? and the stiffness is k = 1.5kN/m, determine the smallest angle ? for...

The cast-iron bell-crank lever depicted in the figure is acted upon by forces F1 of 2.4 kN and F2 of 3.2 kN. The section AA at the central pivot has a curved inner surface with a radius of ri = 25...

The figure shows a formed sheet-steel bracket. Instead of securing it to the support with machine screws, welding has been proposed. If the combined stress in the weld metal is limited to 900 psi,...

The pendulum consists of the slender rod OA, which has a mass per unit length of 3 kg/m. The thin disk has a mass per unit area of 12 kg/m2. Determine the distance y to the center of mass G of the...

Two large steel plates at temperatures of 90? and 70?C are separated by a steel rod 0.3 m long and 2.5 cm in diameter. The rod is welded to each plate. The space between the plates is filled with...

Determine the mass moment of inertia of the 0.9-lb machine component shown with respect to the axis AA .

Calculate the radius of an iridium atom, given that Ir has an FCC crystal structure, a density of 22.4 g/cm 3 , and an atomic weight of 192.2 g/mol.

The man picks up the 52-ft chain and holds it just high enough so it is completely off the ground. The chain has points of the attachment A and B that are 50 ft apart. If the chain has a weight of 3...

A solar collector provides the hot water needs of a family for a period of 8 months except for four months of winter season. The collector supplies hot water at an average temperature of 60oC and the...

Refrigerant-134a enters an adiabatic compressor at 15 psia and 20°F with a volume flow rate of 10 ft3/s and leaves at a pressure of 100 psia. The power input to the compressor is 45 hp. Find (a)...

Consider a steam power plant that operates on a regenerative Rankine cycle and has a net power output of 150 MW. Steam enters the turbine at 10 MPa and 500°C and the condenser at 10 kPa. The...

Consider the electronic elements that are cooled by forced convection in Problem 6.26. The cooling system is designed and tested at sea level (P = I atm), but the circuit board is sold to a customer...

For the frame and loading shown, determine the reactions at A and C. 130 N 30 mm 60 mm 40 mm-

A condenser-boiler section contains a 2-m x 2-m copper plate operating at a uniform temperature of T s = 100C and separating saturated steam, which is condensing, from a saturated liquid-X, which...

Calculate the heat transfer, in Btu/lbm, for the reversible process 1-3 shown in Fig. P7-45E. 360 s, Btu/lbm R FIGURE P7-45E

If it is assumed that, for steel alloys, the average cooling rate of the heat-affected zone in the vicinity of a weld is 10C/s, compare the microstructures and associated properties that will result...

If a force of P = 200 N is applied to the handle of the bell crank, determine the maximum torque M that can be resisted so that the flywheel is not on the verge of rotating clockwise. The coefficient...

A bolted joint is to have a grip consisting of two -in steel plates and one wide -in American Standard plain washer to fit under the head of the in-13 X 1.75 in UNC hex-head bolt. (a) What is the...

A uniform beam having a weight W supports a vertical load F. If the ground pressure varies linearly as shown, determine the load intensities w1 and w2 measured in lb/ft, necessary for equilibrium....

Determine the internal normal force, shear force, and moment acting at points B and C on the curved rod. Units Used: kip = 103 lb Given: F = 500 lb 2 = 30 deg r = 2 ft a = 3 1 = 45 deg b = 4 - NB M

A 10-kg slender rod of length L is attached to collars which can slide freely along the guides shown. Knowing that the rod is in equilibrium and that =25, determine (a) The angle that the rod forms...

A thin coating, which is applied to long, cylindrical copper rods of 10-mm diameter, is cured by placing the rods horizontally in a large furnace whose walls are maintained at 1300 K. The furnace is...

A process has the transfer function of Eq. 6-14 with K = 2, ?1 = 10, ?2 = 2. If ?a has the following value: Calculate the responses for a step input of magnitude 0.5 and plot them in a single figure....

The bolted connection shown in the figure uses SAE grade 5 bolts. The members are hot-rolled AISI 1018 steel. A tensile shear load F = 4000 lbf is applied to the connection. Find the factor of safety...

An adiabatic heat exchanger is to cool ethylene glycol (cp = 2.56 kJ/kg C) flowing at a rate of 2 kg/s from 80 to 40C by water (cp = 4.18 kJ/kg C) that enters at 20C and leaves at 55C. Determine...

Consider an ideal gas at 400 K and 100 kPa. As a result of some disturbance, the conditions of the gas change to 404 K and 96 kPa. Estimate the change in the specific volume of the gas using (a) Eq....

Electrical components mounted to each of two isothermal plates are cooled by passing atmospheric air between the plates, and an in-line array of aluminum pin fins is used to enhance heat transfer to...

Show that the radius r of the orbit of a moon of a given planet can be determined from the radius R of the planet, the acceleration of gravity at the surface of the planet, and the time required by...

A solar furnace consists of an evacuated chamber with transparent windows, through which concentrated solar radiation is passed. Concentration may be achieved by mounting the furnace at the focal...

A concentric tube arrangement, for which the inner and outer diameters are 80 mm and 100 mm, respectively, is used to remove heat from a biochemical reaction occurring in a 1-m-long settling tank....