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...
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...
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
A solar collector design consists of several parallel tubes each enclosed concentrically in an outer tube which is transparent to solar radiation. The tubes are thin walled with diameter of the inner...
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...
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...
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...
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,...
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...
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...
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...
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.
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...
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...
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...
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...
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...
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...
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...
Knowing that α =65°, determine the resultant of the three forces shown. 400 N 600 N 300 N 20
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...
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...
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...
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...
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...
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...
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...
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...
The smooth rod of mass M rests inside the glass. Determine the reactions on the rod. Given: M = 20 gm a = 75 mm b = 200 mm = 40 deg g = 9.81m/s2 b.
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 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 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 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...
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.
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...
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,...
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 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...
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...
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.
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 100 kmol/h stream that is 97 mole% carbon tetrachloride (CCl4) and 3% carbon disulfide (CS2) is to be recovered from the bottom of a distillation column. The feed to the column is 16 mole% CS2 and...
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...
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
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...
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...
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...
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...
Baseboard heaters are basically electric resistance heaters and are frequently used in space heating. A home owner claims that her 5-year-old baseboard heaters have a conversion efficiency of 100...
A plate (k = 10W/m K) is stiffened by a series of longitudinal ribs having a rectangular cross section with length L = 8 mm and width w = 4 mm. The base of the plate is maintained at a uniform...
Airflow through a long, O.2-m-square air conditioning duct maintains the outer duct surface temperature at 10C. If the horizontal duct is uninsulated and exposed to air at 35C in the crawlspace...
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 ...
A speech signal with bandwidth B = 10 kHz is sampled at F2 = 20 kHz. Suppose that the signals is corrupted by four sinusoids with frequencies F1 = 10,000 Hz, F3 = 7778 Hz, F2 = 8889 Hz, F4 = 6667 Hz...
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 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...
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...
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...
Determine the volume and total surface area of the body shown. 52 mm 42 mm 60 mm 20 mm
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.
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
Saturated refrigerant-134a vapor at 15 psia is compressed reversibly in an adiabatic compressor to 80 psia. Determine the work input to the compressor. What would your answer be if the refrigerant...
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...
The parallel form of the PID controller has the transfer function given by Eq. 8-14. Many commercial analog controllers can be described by the series form given by Eq. 8-15. (a) For the simplest...
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...
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,...
Heat transfer is not an intuitive process muses the Curious Cook. Does doubling the thickness of a hamburger approximately double the cooking time? What effect does the initial temperature have on...
In Prob. 10.12, knowing that a = 42 in., b = 28 in., and W = 160lb, determine the tension T in cable AE when the door is held in the position for which BD = 42 in. Problem 10.12: An overhead garage...
Explain why it is preferable to separate a dilute mixture of benzoic acid in water by liquidliquid extraction rather than distillation.
A total of 2,000 gallons of 70 wt% ethanol in water, having a specific gravity of 0.871, is to be separated at 1 atm in a batch rectifier operating at constant distillate composition with a constant...
Argon gas enters an adiabatic compressor at 120 kPa and 30C with a velocity of 20 m/s and exits at 1.2 MPa, 530C, and 80 m/s. The inlet area of the compressor is 130 cm2. Assuming the surroundings to...
An ideal diesel engine has a compression ratio of 20 and uses air as the working fluid. The state of air at the beginning of the compression process is 95 kPa and 20C. If the maximum temperature in...
A piston/cylinder arrangement B is connected to a 1-m3 tank A by a line and valve, shown in Fig. P5.18. Initially both contain water with A at 100 kPa, saturated vapor and B at 400C, 300 kPa,...
A process consists of two stirred tanks with Input q and outputs T1 and T2 (see figure). To test the hypothesis that the dynamics in each tank are basically first order, a step change in q is made...
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...
An abrasive cutoff wheel has a diameter of 6 in, is 1/16 in thick, and has a 1-in bore. It weighs 6 oz and is designed to run at 10 000 rev/min. If the material is isotropic and = 0.20, find the...
Illustrated is a rectangular steel bar with simple supports at the ends and loaded by a force F at the middle; the bar is to act as a spring. The ratio of the width to the thickness is to be about b...
Determine the force in each member of the truss and state if the members are in tension or compression. The horizontal force component at A must be zero. Why? Units Used: kip = 103 lb Given: F1 = 600...
The eye hook has a positive locking latch when it supports the load because its two parts are pin-connected at A and they bear against one another along the smooth surface at B. Determine the...
A 0.238 6-g sample contained only NaCl and KBr. It was dissolved in water and required 48.40 mL of 0.048 37 M AgNO3 for complete titration of both halides [giving AgCl(s) and AgBr(s)]. Calculate the...
An ideal Otto cycle has a compression ratio of 8. At the beginning of the compression process, air is at 95 kPa and 27C, and 750 kJ/kg of heat is transferred to air during the constant-volume...
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
Using the method of Sec. 7.6, solve Prob. 7.40. Problem 7.40: For the beam and loading shown, (a) Draw the shear and bending-moment diagrams, (b) Determine the maximum absolute values of the shear...
Consider conditions for which a mercury-in-glass thermometer of 4-mm diameter is inserted to a length L through the wall of a duct in which air at 77C is flowing. If the stem of the thermometer at...
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...
The noise equivalent bandwidth of a band pass signal is defined as the value of band width that satisfies the relation 2BS (fc) = P/2 where 2B is the noise equivalent bandwidth centered around the...
Nitrogen gas at 60 kPa and 7C enters an adiabatic diffuser steadily with a velocity of 200 m/s and leaves at 85 kPa and 22C. Determine (a) The exit velocity of the nitrogen and (b) The ratio of the...
A heat exchanger is to cool ethylene glycol (cp = 2.56 kJ/kg C) flowing at a rate of 2 kg/s from 80C to 40C by water (cp = 4.18 kJ/kg C) that enters at 20C and leaves at 55C. Determine (a) the rate...
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 rigid tank is divided into two equal parts by a partition. One part of the tank contains 1.5 kg of compressed liquid water at 300 kPa and 60C and the other side is evacuated. Now the partition is...
The kinetic sculpture requires that each of the three pinned beams be in perfect balance at all times during its slow motion. If each member has a uniform weight density and length L, determine the...
A wet steam at 20bar with a quality of 0.97 (see Problem 7.32) leaks through a defective steam trap and expands to a pressure of 1 atm. The process can be considered to take place in two stages: a...
Why is a just-in-time compiler useful for executing Java programs?
The column is used to support the upper floor. If a force F is applied perpendicular to the handle to tighten the screw, determine the compressive force in the column. The square-threaded screw on...