Thermodynamics by cengel 6th edition solution manual

Analysis Applyingthe hydrostaticequation, 2 3 2 2 2 2 1 lbf 1 ft The absolute pressure in the chamber is to be determined. It isto be convertedto SIunits. AssumptionsThe listedpressure isgage pressure. The absolutepressure in thetankisto be determined. AnalysisTheatmospheric orbarometric pressure canbe expressedas atm 2 3 2 2 2 1 lbf 1 ft Thepressuresthisman exertson the groundwhen he standson one andon bothfeet are to be determined.

Assumptions The weight ofthe personisdistributeduniformly onfootimprintarea. AnalysisThe weight ofthe man isgivento be lbf. Noting that pressure isforce perunit area,the pressure thisman exertson the ground is a On both feet: 2 2 lbf 2. The gage pressure in the sameliquid at a different depth isto be determined.

Assumptions The variationofthe density oftheliquid withdepthisnegligible. The localatmospheric pressureand the absolute pressure at the same depthin a different liquidare to be determined. Assumptions The liquidandwaterare incompressible. Then densityofthe liquidisobtainedby multiplyingitsspecific gravity bythe densityofwater, 2 3 3 SG 0. The difference between the pressuresacting on the head andon the toesisto be determined.

Assumptions Waterisan incompressible substance,andthusthedensity doesnot change with depth. Patm h P hhead htoe The verticaldistanceclimbed isto be determined. AssumptionsThe variationofairdensityand the gravitational acceleration with altitudeisnegligible. Theheight ofthe building isto be determined. Assumptions The variationofairdensitywith altitudeisnegligible. The entiresoftware solutionisto be printed out,includingthe numerical results with properunits. The pressure ofthe gasisto be determined.

The effectofthe spring force inthe range of0 to Non the pressure insidethe cylinderisto be investigated. The pressure against thespring forceisto be plotted,and resultsare to be discussed.

The pressure inside the cylinderandthe effectofvolume change onpressure are to be determined. AssumptionsFriction between the piston and thecylinderisnegligible. Analysis a The gaspressure in the piston—cylinderdevice dependsonthe atmospheric pressure andtheweightofthe piston. DiscussionIfthe gasbehavesasan idealgas,the absolutetemperature doubleswhenthe volumeisdoubledat constant pressure. Fora specifiedreadingofgage pressure,the difference betweenthefluidlevelsofthe two armsofthe manometeristo be determined formercury and water.

Differential fluid height againstthe densityisto be plotted,andthe resultsare to be discussed. The underscore displays whatever follows as subscripts in the Formatted Equations Window. Fora given oil-level differencebetweenthe twocolumns, the absolutepressure in thetank isto be determined. The absolute pressure in the tank is to be determined for the cases of the manometer arm with the higher and lower fluid level being attached to the tank.

AssumptionsThe fluidin the manometerisincompressible. Fora given mercury-leveldifference between thetwo columns,the absolute pressure inthe duct isto be determined. Analysis a The pressure in theduct isaboveatmosphericpressure since the fluid columnon theduct sideisat a lowerlevel. Fora given mercury-leveldifference between the two columns,the absolute pressure inthe ductisto be determined.

Analysis a The pressure in theduct isaboveatmospheric pressuresincethe fluid column onthe ductside isat a lowerlevel. Theabsolutepressure in thepipeline isto be determined. Assumptions 1 All the liquids are incompressible. The specific gravity ofmercuryisgiven to be Also, it can be shown that the in high air column with a density of 0.

Therefore,itseffect on thepressure differencebetweenthe two pipesis negligible. Assumptions1 All the liquidsare incompressible. The specific gravityofmercury isgivento be The specific gravity of oil is given to be 0. Thesepressuresare to be expressedin kPa,psi,and meterwatercolumn.

Assumptions Both mercuryand waterare incompressible substances. Thisproblemshowswhy mercury isa suitable fluid forbloodpressure measurement devices.

The height thatthe bloodwill rise in the tube isto be determined. Assumptions 1 The densityofblood isconstant. Thisexplainswhy IV tubesmust be placed highto force a fluidinto the vein ofa patient. The watercolumn heightin onearmand the ratio ofthe heightsofthe two fluidsinthe otherarmare given. The height ofeachfluidin that armisto be determined. Assumptions Both waterand oil are incompressiblesubstances.

We let the height ofwaterandoilin the right armto be hw2 and ha,respectively. Thisisexpectedsince oilislighterthanwater. The specific gravity of one fluid is known, and the specific gravity oftheotherfluidisto be determined.

Assumptions1 Densitiesofliquidsare constant. PropertiesThespecificgravityofone fluidisgiven to be Analysis The absolutepressure P1 isdetermined from 1 atm atm 3 3 0.

The fluid gage pressure that must be maintained in the reservoiris to be determined. Assumptions The weight ofthe piston ofthe lift isnegligible. Fora given pressure drop andbrine levelchange,the area ratioisto be determined.

PropertiesThe specific gravitiesare given to be AnalysisIt isclearfromtheproblemstatement and the figure thatthe brinepressure ismuchhigherthantheairpressure,and when the airpressure dropsby0. Bothoftheseare positivequantitiessinceasthemercury-brineinterface drops,thedifferentialfluidheightsfor both mercuryandbrineincrease. The differential height h ofthe mercurycolumn isto be determined. AssumptionsThe airpressure in the tank isuniform i.

The specific gravitiesofoil andmercuryare givento be 0. DiscussionDoubleinstrumentationlike thisallowsone to verify the measurement ofone ofthe instrumentsby the measurement ofanotherinstrument. The specific gravitiesofoil and mercury are given to be 0. Air hoil 40 kPa hHg hw Solving Engineering Problemsand Equation Solvers CDespitethe convenienceand capabilitytheengineering software packagesoffer,they are still justtools,andthey will not replacethe traditionalengineeringcourses.

Theywillsimply cause a shift inemphasisin thecourse materialfrom mathematicsto physics. They are ofgreat value in engineeringpractice,however,asengineerstoday relyon software packagesforsolving large and complexproblemsin a shorttime,andperformoptimization studiesefficiently.

Review Problems E The thrust developedby the jet engine ofa Boeing isgiven to be 85,pounds. Thisthrustisto be expressedin N and kgf. Accountingforthisvariation,theweightsofa body at different locationsare to be determined. AnalysisTheweight ofan kgman at variouslocationsisobtainedby substitutingthealtitude z valuesin m intothe relation 6 2 2 1 N 80 kg 9. The steakthat isa betterbuy isto be determined. AssumptionsThe steaksare ofidenticalquality. AnalysisTo make a comparisonpossible,we need to expressthe cost ofeach steakon a common basis.

Let uschoose 1 kg as the basisforcomparison. Itsweightisto be determinedin variousunits. AnalysisApplyingNewton'ssecondlaw,the weight isdetermined invariousunitsto be 2 2 1 N 1 kg 9. It isto be expressedin psi,kPa,atm,andbars.

The diameterofthe pistonon which the weightto be placed isto be determined. Assumptions 1 The cylindersofthe lift are vertical. AnalysisNoting that pressureisforce perunitarea,the pressure onthe smallerpistonisdeterminedfrom 2 21 1 1 2 2 2 1 1 25 kg 9. It features over new homework problems which further enhance the extensive and diverse homework problem sets, and physical intuition to help students develop a sense of the underlying physical mechanisms and a mastery of solving practical problems that an engineer is likely to face in the real world.

The title includes a free Student Resources DVD containing Limited Academic Version of EES Engineering Equation Solver software with scripted solutions to selected text problems, Physical experiments in thermodynamics with videos and complete write-ups of the experiments, as well as actual data, and an Interactive Thermodynamics Tutorial to reinforce student learning of thermodynamics concepts.

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