A 1.4-kg aluminum household iron has a 500 W heating element. The surface area is 0.046 m2. The ambient temperature is 21?C and the surface heat transfer coefficient is 11 W/(m2 K). How long after...

The figure illustrates a torsion-bar spring O A having a diameter d = 12 mm. The actuating cantilever AB also has d = 12 mm. Both parts are of carbon steel. Use superposition and find the spring rate...

Currently eighty-five percent of all neck injuries are caused by rear-ends car collisions. To alleviate this problem, an automobile seat restraint has been developed that provides additional pressure...

Knowing that the pulley has a radius of 1.5 ft, determine the components of the reactions at A and E. 3ft 9ft -9ft 3ft 6 ft 210 Ib

A 15-g magnet D is released from rest in the position shown, falls a distance of 320 mm, and becomes attached at A to the 200-g steel bar AB. Assuming that the impact is perfectly plastic, determine...

Thermal imagers have radiation detectors that are sensitive to a spectral region and provide white-black or color images with shading to indicate relative temperature differences in the scene. The...

(a) For a liquid solution having a molar composition of ethyl acetate (A) of 80% and ethyl alcohol (E) of 20%, calculate the bubble-point temperature at 101.3kPa and the composition of the...

An air-conditioning system operates at a total pressure of 1 atm and consists of a heating section and a humidifier that supplies wet steam (saturated water vapor) at 100oC. Air enters the heating...

A Pennsylvania coal contains 74.2% C, 5.1% H, 6.7% O, (dry basis, mass percent) plus ash and small percentages of N and S. This coal is fed into a gasified along with oxygen and steam. The exiting...

A vacuum gage indicates that the pressure of carbon dioxide in a close tank is 10 kPa. A mercury barometer gives the local atmospheric pressure as 750 mmHg. Determine the absolute pressure of the...

A transmission tower is held by three guy wires anchored by bolts at B, C, and D. If the tension in wire AD is 1260 N, determine the components of the force exerted by the wire on the bolt at D. 20 m

An experimental nuclear core simulation apparatus consists of a long thin-walled metallic tube of diameter D and length L, which is electrically heated to produce the sinusoidal heat flux...

Each of the three members of the frame has a mass per unit length of 6 kg/m. Locate the position (x, y) of the center of mass. Neglect the size of the pins at the joints and the thickness of the...

Blocks A and B each have a mass of 0.4 kg and block C has a mass of 1.2 kg. The coefficient of friction between the blocks and the plane is k = 0.30. Initially block A is moving at a speed v0 = 3 m/s...

Two 3-kg uniform bars are connected to form the linkage shown. Neglecting the effect of friction, determine the reaction at D immediately after the linkage is released from rest in the position shown.

Determine the force in members JI, EF, EI, and JE of the truss, and state if the members are in tension orcompression. 1500 Ib 1000 Ib 1000 Ib 900 lb s'ft DE 8'ft 8'ft 8 ft 8 ft 8 ft' 8 ft'8 ft' 8...

At a constant amplitude, completely reversed bending stress level, the cycles-to-failure experience with 69 specimens of 5160H steel from 1.25-in hexagonal bar stock was as follows: Where L is the...

To water seedlings, a gardener joins three lengths of pipe, AB, BC, and CD, fitted with spray nozzles and suspends the assembly using hinged supports at A and D and cable EF. Knowing that the pipe...

Determine the volume and total surface area of the body shown. 52 mm 42 mm 60 mm 20 mm

If the resultant force acting on the bracket is to be FR = {800j} N, determine the magnitude and coordinate direction angles ofF. 45 = 750 N

Repeat problem 1310 for a helical gearset with n = 20 and = 30. Problem 1310, for a spur gearset with = 20, while avoiding interference, find: (a) The smallest pinion tooth count that will run with...

A rigid tank contains 2 kmol of N2 and 6 kmol of CH4 gases at 200 K and 12 MPa. Estimate the volume of the tank, using (a) The ideal-gas equation of state, (b) Kays rule, and (c) The compressibility...

Chain AB of length 6.4 m supports a horizontal, uniform steel beam having a mass per unit length of 85 kg/m. Determine (a) The horizontal distance a from A to the lowest point C of the chain, (b) The...

A 24-kg uniform cylindrical roller, initially at rest, is acted upon by a 100-N force as shown. Knowing that the body rolls without slipping, determine (a) The velocity of its center G after it has...

Consider the diffuse, gray, four-surface enclosure with all sides equal as shown. The temperatures of three surfaces are specified, while the fourth surface is well insulated and can be treated as a...

Dry air at 32C flows over a wetted plate of length 200 mm and width 1 m (case A). An imbedded electrical heater supplies 432 Wand the surface temperature is 27C. (a) What is the evaporation rate of...

The steel plate shown will support six 50-mm-diameter idler rollers mounted on the plate as shown. Two flat belts pass around the rollers, and rollers A and D will be adjusted so that the tension in...

It takes 16 s to raise a 2800-lb car and the supporting 650-lb hydraulic car-lift platform to a height of 6.5 ft. Knowing that the overall conversion efficiency from electric to mechanical power for...

The disk has a constant angular velocity of 20 rad/s clockwise. (a) Determine the two values of the angle for which the velocity of collar D is zero. (b) For each of these values of , determine the...

Without looking at data in the text, sketch a qualitative graph of the third ionization energy versus atomic number for the elements Na through Ar, and explain your graph.

A mixture of helium and nitrogen with a nitrogen mass fraction of 35 percent is contained in a piston-cylinder device arranged to maintain a fixed pressure of 100 psia. Determine the work produced,...

Ethylene (C2H4) is burned with 175 percent theoretical air during a combustion process. Assuming complete combustion and a total pressure of 14.5 psia, determine (a) The air-fuel ratio (b) The...

A metal sphere of diameter D, which is at a uniform temperature Tj, is suddenly removed from a furnace and suspended from a fine wire in a large room with air at a uniform temperature T and the...

Two identical uniform boards, each of weight 40 lb, are temporarily leaned against each other as shown. Knowing that the coefficient of static friction between all surfaces is 0.40, determine (a) The...

A constant force P is applied to a piston and rod of total mass m to make them move in a cylinder filled with oil. As the piston moves, the oil is forced through orifices in the piston and exerts on...

The following mixture is introduced into a distillation column as saturated liquid at 1.72MPa. Calculate the bubble-point temperature using the K-values of Figure. Compound kmol/h Ethane 1.5 Propane...

Solve Prob. 451 using Castiglianos theorem. Prob. 451, The figure shows a rectangular member OB, made from ¼-in-thick aluminum plate, pinned to the ground at one end and supported by a...

Water is the working fluid in a cogeneration cycle that generates electricity and provides heat for campus buildings. Steam at 2.5 MPa, 320oC and a mass flow rate (m) of 1 kg/s, expands through a...

Liquid octane (C8H18) at 77F is burned completely during a steady-flow combustion process with 180 percent theoretical air that enters the combustion chamber at 77F. If the products leave at 2500 R,...

A 20-mm diameter sphere is suspended in a dry air stream with a temperature of 22C. The power supplied to an embedded electrical heater within the sphere is 2.51 W when the surface temperature is...

A golfer hits a ball with an initial velocity of magnitude v0 at an angle ? with the horizontal. Knowing that the ball must clear the tops of two trees and land as close as possible to the flag,...

The two blocks are released from rest when r = 2.4 ft and d = 30?. Neglecting the mass of the pulley and the effect of friction in the pulley and between block A and the horizontal surface,...

Pin P slides in a circular slot cut in the plate shown at a constant relative speed u = 180 mm/s. Knowing that at the instant shown the plate rotates clockwise about A at the constant rate = 6...

A somewhat simplified flow diagram for a nuclear power plant shown in Fig. 1.4 is given in Fig. P6.102. Mass flow rates and the various states in the cycle are shown in the accompanying table. The...

A cylinder fitted with a movable piston contains water at 3 MPa, 50% quality, at which point the volume is 20 L. The water now expands to 1.2 MPa as a result of receiving 600 kJ of heat from a large...

A 4-ft3 rigid tank contains saturated refrigerant- 134a at 100 psia. Initially, 20 percent of the volume is occupied by liquid and the rest by vapor. A valve at the top of the tank is now opened, and...

To form an unsymmetrical girder, two L3 3 -in. angles and two L6 4 -in. angles are welded to a 0.8-in. steel plate as shown. Determine the moments of inertia of the combined section with...

A shell-and-tube heat exchanger with one shell pass and 20 tube passes uses hot water on the tube side to heat oil on the shell side. The single copper tube has inner and outer diameters of 20 and 24...

A solution containing hydrogen peroxide with a mass fraction xp0 (kg H2 O2/kg solution) is added to a storage tank at a steady rate m0 (kg/h). During this process the liquid level reaches a corroded...

A capillary viscometer measures the time required for a specified volume υ of liquid to flow through a small-bore glass tube, as in Fig. P6.17. This transit time is then correlated with fluid...

Helium gas is compressed from 14 psia and 70F to 120 psia at a rate of 5 ft3/s. Determine the power input to the compressor, assuming the compression process to be (a) Isentropic, (b) Polytropic with...

In thermo mechanical data storage, a processing head, consisting of M heated cantilevers, is used to write data onto an underlying polymer storage medium. Electrical resistance heaters are micro...

The head-and-motor assembly of a radial drill press was originally positioned with arm AB parallel to the z axis and the axis of the chuck and bit parallel to the y axis. The assembly was then...

A light train made of two cars travels at 72 km/h. The mass of car A is 18 Mg and the mass of car B is 13 Mg. When the brakes are suddenly applied, a constant braking force of 19 kN is applied to...

Velocity near a moving sphere, a sphere of radius R is falling in creeping flow with a terminal velocity v through a quiescent fluid of viscosity/. At what horizontal distance from the sphere does...

Use of boundary-layer equations, air at 1 atm and 20 o C flows tangentially on both sides of a thin, smooth flat plate of width W = 10 ft, and of length L = 3 ft in the direction of the flow. The...

Methane is burned with 25% excess air in a continuous adiabatic reactor. The methane enters the reactor at 25C and 1.10 atm at a rate of 5.50 Us and the entering air is at 150C and 1.1 atm....

Solve Exercise 8.11 with a right-triangle diagram. In Exercise 8.11 One thousand kilograms per hour of a 45 wt% acetone in- water solution is to be extracted at 25?C in a Continuous, countercurrent...

Use a linear interpolation to estimate properties of ammonia to fill out the table below P [kPa] T [ C] v [m3/kg] x a) 550 0.75 b) 80 20 c) 10 0.4

A 200-MHz left-hand circularly polarized plane wave with an electric field modulus of 5 V/m is normally incident in air upon a dielectric medium with r = 4 and occupying the region defined by...

For the transmission tower of Prob. 2.89, determine the tensions in cables AB and AD knowing that the tension in cable AC is 1770 N and that the resultant of the forces exerted by the three cables at...

The disk shown rotates with a constant clockwise angular velocity of 12 rad/s. At the instant shown, determine (a) The angular velocity and angular acceleration of rod BD, (b) The velocity and...

Criterion for Vapor-Free Flow in a Pipeline, to ensure that a pipeline is completely liquid-filled, it is necessary that p > P vap at every point. Apply this criterion to the system in Fig. 7.5-1, by...

5,000 lb/h of a saturated aqueous solution of (NH4)2SO4 at 80C is cooled to 30C. At equilibrium, what is the amount of crystals formed in lb/h. If during the cooling process, 50% of the water is...

The rectangular bin is filled with coal, which creates a pressure distribution along wall A that varies as shown, i.e., p = p0(z/b)1/3. Compute the resultant force created by the coal, and its...

In the thermal processing of semiconductor materials, annealing is accomplished by heating a silicon wafer according to a temperature-time recipe and then maintaining a fixed elevated temperature for...

Air at 25C flows over a 10-mm-diameter sphere with a velocity of 25 m/s, while the surface of the sphere is maintained at 75C (a) What is the drag force on the sphere? (b) What is the rate of heat...

A 2.5-lb block B is moving with a velocity v0 of magnitude v0 = 6 ft/s as it hits the 1.5-lb sphere A, which is at rest and hanging from a cord attached at O. Knowing that k = 0.6 between the block...

A long, hollow cylinder is constructed from a material whose thermal conductivity is a function of temperature according to k = 0.060 + 0.00060 T, where T is in ?F and k is in Btu/h ?F. The inner and...

Repeat Prob. 384 with Fx = 300 lbf, Fy = 250 lbf, and Fz = 0, and for a brittle material, requiring the inclusion of stress concentration in the fillet radius. Repeat Prob. 384, The cantilevered bar...

An inventor has devised a complicated non-flow process in which I mol of air is the working fluid. The net effects of the process are claimed lo be; A change in state of the air from 250oC and 3 bar...

The value of the gravitational acceleration g decreases with elevation from 9.807 m/s2 at sea level to 9.767 m/s2 at an altitude of 13,000 m, where large passenger planes cruise. Determine the...

Consider water at 27C in parallel flow over an isothermal, 1-m-long flat plate with a velocity of 2 m/s. (a) Plot the variation of the local heat transfer coefficient, hx(x), with distance along the...

Derive (15-44). Use this equation to solve the following problem. Sulfate ion is to be removed from 60 L of water by exchanging it with chloride ion on 1 L of a strong-base resin with relative molar...

For the system and loading shown, determine (a) The force P required for equilibrium, (b) The corresponding force in member BD, (c) The corresponding reaction at C. 150 mm 30 200N 100 N

The Howe bridge truss is subjected to the loading shown. Determine the force in members HI, HB, and BC, and state if the members are in tension orcompression. 40 kN 30 kN 20 kN 20 kN G. . D. 16 m,...

Argon gas expands in an adiabatic turbine from 3 MPa and 750C to 0.2 MPa at a rate of 5 kg/s. The maximum power output of the turbine is (a) 1.06 MW (b) 1.29 MW (c) 1.43 MW (d) 1.76 MW (e) 2.08 MW

A small 0.2 kg sphere B is given a downward velocity 0 v and swings freely in the vertical plane, first about O and then about the peg A after the cord comes in contact with the peg. Determine the...

Steady-state creep rate data are given below for nickel at 1000(C (1273 K): If it is known that the activation energy for creep is 272,000 J/mol, compute the steady-state creep rate at a temperature...

Calculate the number of degrees of freedom for the mixed-feed, triple-effect evaporator system shown in Figure. Assume that the steam and all drain streams are at saturated conditions and the feed is...

If a force P = 100 N is applied to the lever arm of the toggle press, determine the clamping force developed in the block when ? = 45?. Neglect the weight of the block. -200 mm B. 200 mm 500 mm-

The addition of insulation to a cylindrical surface, such as a wire, may increase the rate of heat dissipation to the surroundings (see Problem 2.4). (a) For a No. 10 wire (0.26 cm in diameter), what...

A 20 kg block of aluminum at 97.4oC is dropped into a tank containing 10 kg of water at 1oC. If the final temperature after equilibrium is 30oC, determine (a) U. (b) S for the combined system of...

An unknown sample of Cu2+ gave an absorbance of 0.262 in an atomic absorption analysis. Then 1.00 mL of solution containing 100.0 ppm (= g/mL)Cu2+ was mixed with 95.0 mL of unknown, and the mixture...

This problem illustrates that the strength of a machine part can sometimes be measured in units other than those of force or moment. For example, the maximum speed that a flywheel can reach without...

A Carnot heat engine receives heat from a reservoir at 900C at a rate of 800 kJ/min and rejects the waste heat to the ambient air at 27C. The entire work output of the heat engine is used to drive a...

Steam is throttled from 9 MPa and 500C to a pressure of 7 MPa. Determine the decrease in energy of the steam during this process. Assume the surroundings to be at 25C.

The crate has a mass M and is subjected to a towing force P acting at an angle 1 with the horizontal. If the coefficient of static friction is s, determine the magnitude of P to just start the crate...

A 2.00 mole% sulfuric acid solution is neutralized with a 5.00 mole% sodium hydroxide solution in a continuous reactor. All reactants enter at 25C. The standard heat of solution of sodium sulfate is ...

Bolts distributed about a bolt circle are often called upon to resist an external bending moment as shown in the figure. The external moment is 12 kip? In and the bolt circle has a diameter of 8 in....

The structure of a house is such that it loses heat at a rate of 5400 kJ/h per C difference between the indoors and outdoors. A heat pump that requires a power input of 6 kW is used to maintain this...

A long bar of rectangular cross section is 60 mm by 90 mm on a side and has a thermal conductivity of 1W/m K. One surface is exposed to a convection process with air at 100C and a convection...

Consider a chain of (n 1) regenerative repeaters, with a total of n sequential decisions made on a binary PCM wave, including the final decision made at the receiver. Assume that any binary symbol...

An air-standard Diesel cycle has a compression ratio of 16 and a cutoff ratio of 2. At the beginning of the compression process, air is at 95 kPa and 27C. Accounting for the variation of specific...

A 280-kg crate is supported by several rope-and-pulley arrangements as shown. Determine for each arrangement the tension in the rope. (a) a)

Determine by direct integration the mass moment of inertia with respect to the z axis of the right circular cylinder shown assuming that it has a uniform density and a mass m.

An eccentric, compressive 270-lb force P is applied to the end of a cantilever beam. Replace P with an equivalent force-couple system at G. n. 24 bn.

A system consists of three particles A, B, and C. We know that mA = 1 kg, mB = 2 kg, and mC = 3 kg and that the velocities of the particles expressed in m/s are, respectively, vA = 3i ?? 2j + 4k, vB...

A blending tank in figure is used to mix a process stream (Stream 1, pure A) with a liquid catalyst (Stream 2, pure B). The blending process outlet mixture then flows directly to a reactor. The flow...

An ordinary egg can be approximated as a 5.5-cmdiameter sphere. The egg is initially at a uniform temperature of 8C and is dropped into boiling water at 97C. Taking the properties of the egg to be r...