Intr.Phy Revision Bk Caltec S.4

TRNYANZIDERRICK0776837611/0757773736Page1REVISIONQUESTIONS INTRODUCTIONTOPHYSICS 1.(a)Definethefollowingterms. (i)Physics. (ii)Matter. (b)(i)Writethethreestatesofmatter. (ii)Giveanexampletoeachofthestatesofmatter. (iii)Distinguishbetweenfundamentalquantitiesandderivedquantities. (iv)OutlineexamplesofderivedquantitiesandstatetheirS.Iunit. (v)StatethebasicquantitieswiththeirSIunits. (c)Roundoffthefollowing: (i)18.672to1dp (ii)0.365to2dp. (d)Writethefollowinginstandardform. (i)100 (ii)73.621 (iii)0.529 (iv)0.340 (e)Expressthefollowinginscientificnotation(scientificform) (i)100 (ii)73.621 (iii)0.529 (iv)0.067 (f)Convertthefollowing. (i)25kgtog (ii)0.04kgtog (iii)10kgtog (iv)3mtocm (v)10gtokg (vi)2.5gtokg (vii)0.04gtokg (viii)15mtocm (g)Outlinethedifferentdevicesusedtomeasurelengthandwhateachmeasures. (h)DefinethetermvolumeandstateitsSIunit. (i)Nametheinstrumentsusedtomeasurethefollowing. (i)Diameterofawire. (ii)Diameterofatesttube. (iii)Lengthofafootballpitch. (iv)Widthofadesk. (j)Describeanexperimenttodeterminethevolumeofanirregularobjectusingdisplacement method. (k)Describeanexperimenttodeterminethevolumeofanirregularobjectusinganoverflowcan method. TRNYANZIDERRICK0776837611/0757773736Page2DENSITY 1.(a)(i)DefinethetermdensityanditsSIunit. (ii)Statetheformulafordensity. (b)(i)Calculatethedensityofasubstancewithmass50kgandvolume20m3. (ii)Calculatethedensityofaliquidwithmass120kganddimensions2mby3mby4m. (iii)Calculatethedensityofacubewithmass270gandsideof3cm. (c)Findthedensityofasubstanceofmass100gandvolume50cm3in (i)gcm-3 (ii)kgm-3 (d)Describeanexperimenttodeterminethedensityofanirregularobjectusingdisplacement method. 2.(a)Apieceofstoneofmass100gwasimmersedinwaterinameasuringcylinder.Thewater levelrisedfrom10cm3to25cm3.Calculatethedensityofastone. (b)Ablockofdensity10gcm-3isdroppedintoameasuringcylindercontainingaliquid.Ifthe levelofaliquidrisesfrom25cm3to30cm3,calculatethemassoftheblockingrams. (c)Aboxofmass80kgwasdroppedinacylindercontainingaliquid.Iftheliquidrisedfrom 20cm3to60cm3,calculatethedensity. 3.(a)20cm3ofseawaterofmass20gismixedwith20cm3offreshwaterofmass40g.Calculate thedensityofamixture. (b)4gofliquidXanddensityof2gcm-3ismixedwith8gofliquidYanddensity1gcm-3. (i)FindthevolumeofliquidX. (ii)FindthevolumeofliquidY. (iii)Calculatethedensityofamixture. (c)LiquidYofdensity400kgm-3andvolumeof0.30m3ismixedwithliquidZofdensity300kgm-3 andvolume0.20m3.Find (i)ThemassofY. (ii)ThemassofZ. (iii)Thevolumeofthemixture. (iv)Themassofthemixture. (v)Thedensityofamixture. 4.(a)Definethetermrelativedensity. (b)Calculaterelativedensityofmercuryifthedensityofmercuryis13600kgm-3anddensityof waterbeing1000kgm-3. (c)Calculatetherelativedensityofastoneiftheweightofastoneis80Nandtheweightof waterbeing20N. (d)Calculatetherelativedensityofabodygiventhatthemassofthebodybeing120kgandthe massofwater100kg. (e)Calculatetherelativedensityofasubstanceofdensity0.8gcm-3anddensityofwater=1gcm -3. 5.(a)Adensitybottlewithvolume10m3hasmassof100kgwhenemptyand200kgwhenfilled withwater.Calculatethedensityofthebottle. (b)Abeakerofmass50ghasmassof82gwhenfilledwith40cm3ofaliquid.Findthedensityof aliquid. (c)Abeakerof20cm3hasamassof40gwhenemptyand80gwhenfilledwithaliquid. Calculatethedensityoftheliquid. (d)Outlinethefactorsthataffectdensity. (e)Explainwhyashipfloatsinwateralthoughitismadeupofmetal. 6.(a)Adensitybottlehasmass75gwhenempty,95gwhenfullofwaterand99gwhenfullofa liquid.Calculate (i)Relativedensityoftheliquid. TRNYANZIDERRICK0776837611/0757773736Page3(ii)Densityofaliquidifthedensityofwateris1000kgm-3. (b)Adensitybottleweighs20gwhenempty,45gwhenfilledwithwaterand360gwhenfilled withmercury.Calculate (i)Therelativedensityofaliquid. (ii)Thedensityofmercuryifthedensityofwateris1gcm-3. (c)Abottlefullofwaterhasmassof45gwhenfullofmercury,themassis360g.Ifthemassof theemptybottleis20g,calculate (i)Therelativedensityofmercury. (ii)Thedensityofthemercuryifthedensityofwateris1000kgm-3. (d)Themassofdensitybottleis18.00gwhenempty,44.00gwhenfullofwaterand39.84g whenfullofoil.Calculate (i)Therelativedensityoftheoil. (ii)Densityofoilifthedensityofwateris1000kgm-3 SCALARQUANTITY,VECTORQUANTITYANDRESULTANTFORCE 1.(a)Distinguishbetweenscalarquantityandvectorquantity. (b)Givefourexamplesofscalarquantityandfourexamplesofvectorquantity. 2.(a)Calculatetheresultantforceofthefollowingsystem. (i) (ii) (iii) (iv) (v) (vi) (b)Resultantforceatrightangle. (i) (ii) (iii) (iv) (c)(i)Findtheresultantforce,F,onthebodyiftheaccelerationiis3ms-2 (ii) Abodyofmass2kgisacteduponbyfourforces10N,2N,7Nand6Nasshownabove. Calculate;2k6N 7N 2N10N6N 15N3N 4N 10N 7N12N 8N8N6N 6N10N 18N8N 5N3N 8N2N 4N 10 7N 5N6N 5N 3N2 N 4N3N TRNYANZIDERRICK0776837611/0757773736Page4(i)Resultantforce. (ii)Accelerationduetogravity. FORCES 1.(a)(i)DefinethetermforceanditsS.Iunit. (ii)DefinetheternaNewton. (iii)Calculatetheforceneededtogiveamassof500kganaccelerationof2ms-2. (iv)Calculatetheforcerequiredtoraiseamassof20kgwithanaccelerationof4ms-2. (v)Abodyofmass15kgmoveswithanaccelerationof6ms-2.Calculatetheforceapplied onthebody. (b)(i)Outlinethedifferenttypesofforces. (ii)Calculatetheweightofthebodygiventhatmassofthebodyis25kgandgravity10ms-2. (iii)Thegravityofabodyonthemoonisofthatonearth.Determinetheweightofabody1 6th ofmass10kg (i)Onearth. (ii)Onthemoon. (c)Findthemassofbodyofthefollowingtakeg=10m/s2 (i)250N. (ii)13N. (d)Givethreedifferencesbetweenmassandweight. 2.(a)(i)DefinethetermfrictionanditsSIunit. (ii) Findtheaccelerationwithwhichabodymoves. (iii) Findthemassofthebody. (b)(i)Statethedifferenttypesoffriction. (ii)Describeanexperimenttodeterminethelimitingfriction(staticfriction) (iii)Outlinefouradvantagesoffriction. (iv)Outlinefourdisadvantagesoffriction. (v)Givewaysofreducingfriction. (vi)Statethelawsoffriction. (vii)Givethefactorsaffectingfriction. (c)(i)Definethetermcoefficientoffriction. (ii) Calculatethecoefficientoffrictiongiventhatg=10m/s2 (iii) Calculatethecoefficientoffrictiongiventhatg=10m/s2. WORK,POWERANDENERGY 1.(a)DefinethefollowingtermsandstatetheSIunittoeach.2kg4N 7N mg3kg6N 12N mg2kg4N 10Nams-2 Body7N 19N2ms-2 TRNYANZIDERRICK0776837611/0757773736Page5(i)Work. (ii)Power. (iii)Energy. (iv)Joule. (b)Calculatetheworkdonewhenaforceof5Nisusedtoliftaloadthroughadistanceof2m. (c)Calculatetheworkdonewhenaforceof6Npullaboxthroughadistanceof3m. (d)Abodyofmass20kgisraisedthroughaheightof40m.(Takegravityg=10ms-2). Calculate (i)Theweightofthebody. (ii)Theworkdone. 2.(a)Definethefollowingterms. (i)Energy. (ii)Potentialenergy. (iii)Kineticenergy. (b)(i)Statethelawofconservationofenergy. (ii)Outlinethedifferentformsofenergy. (c)Abodyofmass5kgfallsfromaheight3m.Calculatethepotentialenergy. (Takeg=10ms-2) (d)Aboxofmass20kgisraisedfromthegroundtoaheightof5mabovetheground.Findthe gaininthepotentialenergy.(Ifg=10ms-2) (e)Calculatethekineticenergyofa4kgtrolleytravellingatavelocityof3ms-1 (f)Calculatethekineticenergyofabodyofmass6kgmovingatavelocityof2ms-1. (g)Anaircraftofmass50kgisflyingwithavelocityof3ms-1ataheightof4mabovetheground. (Takeg=10ms-2).Calculate (i)Kineticenergy. (ii)Potentialenergy. (iii)Mechanicalenergy. (h)Abodyfallsfreelythrough3m.Calculatethevelocitywithwhichithitstheground. (Takeg=10ms-2). (i)A20kgballfallsfromaheightat0.2m.Calculatethekineticenergyjustbeforeithitsthe ground.(Takeg=10ms-2) (j)Ablockofmass2kgfallsfreelyfromrestthroughadistanceof3m.Findthekineticenergy oftheblock.Takeg=10ms-2. (k)Aballofmass0.1kgfallsfromaheightof1.8monaplateandreboundstoaheightof1.25m. Find; (i)Kineticenergyoftheballbeforethefall. (ii)Thekineticenergyasithitstheplate. (iii)Thevelocitywithwhichithitstheplate. (iv)Thekineticenergyasitleavestheplateonrebouncing. (v)Thevelocityofrebounds. TRNYANZIDERRICK0776837611/0757773736Page6PARTICULATENATUREOFMATTER 1.(a)Definethetermmatter. (b)Statethekinetictheoryofmatter. (c)Outlinethestatesofmatter. (d)Outlinethepropertiesorcharacteristicsof; (i)Solidstate. (ii)Gasstate. (e)Namethechangesthatoccurinthefollowingstates (i)Betweensolidsandgases. (ii)Betweenliquidandgases. 2.(a)DefinethetermBrownianmotion. (b)DescribeanexperimenttodetermineBrownianmotion. (c)(i)Explainwhatisobservedwhensmokeenclosedinanilluminatedtransparentcellis viewedthroughamicroscope. (ii)Statewhatisobservedin(c)(i)whenthecellisplacedontheiceblockandgivea reasonforyouranswer. (d)StatetheimportanceofthefollowinginBrownianmotion. (i)Lightsource. (ii)Theconverginglens. (iii)Microscope. (e)GivetheeffectofthefollowingonBrownianmotion. (i)Temperature. (ii)Thinglasscover. (iii)Sourceoflight. 3.(a)Definethetermdiffusion. (b)Statethefactorsaffectingtherateofdiffusion. (c)Describeanexperimenttodemonstratediffusionin (i)Gases. (ii)Liquids. 4.(a)Definethetermsurfacetension. (b)Statethefactorsthataffectsurfacetension/reductionofsurfacetension. (c)Describeanexperimenttodemonstratesurfacetension. (d)Explainwhywhenadetergentisaddedtocleanwatersurface,aneedlefloatingonthewater surfacesinks. 5.(a)Definethefollowing (i)Intermolecularforces. (ii)Cohesionforceswithexamples. (iii)Adhesionforceswithexamples. (b)Givethedifferencebetweencohesionforcesandadhesionforces. 6.(a)Definethetermcapillarityorcapillaryaction. (b)(i)Drawadiagramandexplainthecausesoftheriseofwaterinthecapillarytube. (ii)Drawadiagramandexplainthecausesofdepressionofthemercuryinthecapillary tube. (c)Giveareasonwhywaterspreadsoveraglasssurfacewhenpouredonit. (d)Givesomeapplicationofcapillarity. (e)Explainwhywhenwaterandmercuryarepouredonaglasssurfacewaterwetstheglass whilemercurydoesnot. TRNYANZIDERRICK0776837611/0757773736Page77.(a)Describeanexperimenttoexplaintheoildropexperiment. (b)Outlinetheassumptionsmadeintheoildropexperiment. (c)Inanoildropexperimenttheradiusoftheoilwasfoundtobe10cmandthevolumeofthe usedoildropwas1.1x10-5cm3.Calculate (i)Thediameteroftheoilfilm. (ii)Thethicknessoftheoilpatch. (iii)Thesizeofthemolecule. (d)If1.8x10-4cm3ofoilspreadstoformanoilpatchofarea150cm2.Calculatethethicknessof theoilpatch. MACHINES 1.(a)Definethefollowingtermsasusedinmachines. (i)Mechanicaladvantage. (ii)Velocityratio.(iii)Efficiency. (b)(i)Whenisthemechanicaladvantagegreaterthanone? (ii)Whenitthemechanicaladvantagelessthanone. (c)Calculatethemechanicaladvantagewhenaneffortof20Nisusedtoliftaloadof120N. (d)Aforceof40Nisusedtoliftaloadof240N.Calculatethemechanicaladvantage. (a)Aloadof200Nisliftedthrough5mwhenaneffortof50Nmovesthroughadistanceof25m. Calculate (i)Mechanicaladvantage. (ii)Velocityratio.(iii)Efficiencyofthesystem. (f)Asimplemachineofvelocityratio4needsaneffortof50Ntoraisealoadof150N.Calculate; (i)Mechanicaladvantage. …