University physics知到章节答案智慧树2023年浙江理工大学

Universityphysics知到章节测试答案智慧树2023年最新浙江理工大学第一章测试Howmanyyearsolderwillyoube1.00gigaseeondfromnow?(Assumea365-dayyear.)（）

参考答案:

31.7yScientificnotation:.w64932155254s.brush0{fill:rgb(255,255,255);}.w64932155254s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155254s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155254s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155254s.font2{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155254s.font3{font-weight:bold;font-size:374px;font-family:宋体;}.w64932155254s.font4{font-weight:bold;font-size:76px;font-family:System,sans-serif;}33.610+230=´？（）

参考答案:

**.w64932155257s.brush0{fill:rgb(255,255,255);}.w64932155257s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155257s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155257s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155257s.font2{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155257s.font3{font-weight:bold;font-size:76px;font-family:System,sans-serif;}33.810´**InΔABC,weknowthatDisapointontheextensionlineofBC,andEisthemidpointoflinesegmentAD.If,and,thenx=（）.

参考答案:

−1/4Vectoroperation.If,and,findthevalueof,suchthatthevectorsandwillbeperpendiculartoeachother（）.

参考答案:

-4/3Twodisplacementvectors,

and

,havemagnitudesS=3mandT=4m,whichofthefollowingcouldnotbethemagnitudeofthedifferencevector?(Theremaybemorethanonecorrectanswer.)（

）.

参考答案:

9m第二章测试Aparticleismovingstraightalongthexdirection,anditspositionisdeterminedbytheequation,wheretheunitofxismeter,andtheunitoftissecond.Thenitsvelocityisexpressedas（）

参考答案:

v=20tVelocityisavector,andspeedisalsoavector.（）

参考答案:

错Themagnitudeoftheaccelerationoftheobjectmaybeverylarge,whilethemagnitudeofthevelocityofanobjectcanremainunchanged.（）

参考答案:

对Awarshipfirestheshellsattowenemyshipsatthesametime.Itisknownthattheshellswillflyalongtheparabolicorbitsasshowninthefigureandhittheenemyships,assumetheshellshasthesameinitialspeed,whichshipwillbehitfirst?（）

参考答案:

ShipBAcarmovesatconstantspeedinahorizontalofradius20.0m,makingacompletecirclein7.0s.Whatistheaccelerationofthecar?（）

参考答案:

**.w64932155258s.brush0{fill:rgb(255,255,255);}.w64932155258s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155258s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155258s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155258s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155258s.font3{font-weight:bold;font-size:76px;font-family:System,sans-serif;}216.1/ms**第三章测试Supposeanastronautlandedonaplanetwhereg=19.6m/s2.Comparedtoearth,woulditbeforhertocatchaballthatismovinghorizontallyat12m/s?(Assumethattheastronaut’sspacesuitisalightweightmodelthatdoesn’timpedehermovementsinanyway.)（）

参考答案:

justaseasySatellitesareheldinorbitbytheforceofourplanet’sgravitationalattraction.Asatelliteinasmall-radiusorbitmovesatahigherspeedthanasatelliteinanorbitoflargeradius.Basedonthisinformation,whatyoucanconcludeabouttheearth’sgravitationalattractionforthesatellite?（）

参考答案:

Itdecreaseswithincreasingdistancefromtheearth.Atrafficlightofweightwhangsfromtwolightweightcables,oneoneachsideofthelight.Eachcablehangsata45°anglefromthehorizontal.Whatisthetensionineachcable?（）

参考答案:

**.w64932155277s.brush0{fill:rgb(255,255,255);}.w64932155277s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155277s.pen1{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155277s.brush1{fill:rgb(0,0,0);}.w64932155277s.pen2{stroke:none;}.w64932155277s.pen3{stroke:rgb(0,0,0);stroke-width:19;stroke-linejoin:round;}.w64932155277s.font0{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155277s.font1{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155277s.brush2{fill:rgb(0,0,0);}.w64932155277s.font2{font-weight:bold;font-size:76px;font-family:System,sans-serif;}2w**Thepersonintheelevatorholdsaspringscalewithaheavyobject.Nowthereadingofthespringscalesuddenlybecomeslarger(Thepersonnevermoves).Whatisthemovementoftheelevatoratthistime?（）

参考答案:

Theelevatorisnowspeedingup.Consideraboxthatisplacedondifferentsurfaces.Inwhichsituation(s)istherenofrictionforceactingonthebox?(

)

参考答案:

Theboxisatrestonaroughhorizontalsurface.

第四章测试Inahydroelectricgeneratingstation,fallingwaterisusedtodriveturbines(“waterwheels”),whichinturnrunelectricgenerators.Comparedtotheamountofgravitationalpotentialenergyreleasedbythefallingwater,howmuchelectricalenergyisproduced?（）

参考答案:

less.HowmuchworkisdonebytheforceFactingonabodywhenthebodymovesfromx=0mtox=2.0mundertheforceof.w64932155281s.brush0{fill:rgb(255,255,255);}.w64932155281s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155281s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155281s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155281s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155281s.font3{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155281s.font4{font-weight:bold;font-size:76px;font-family:System,sans-serif;}36NFx=-?（）

参考答案:

–24JThetheoremofkineticenergyofaparticlefollowsthattheamountofworkdoneisindependentofthepath.（）

参考答案:

错Theworkdonebythenetforceonabodyisequaltotheamountthatthekineticenergyofthebodyincreases.（）

参考答案:

对Abulletofmassm=10gandv=200m/sspeedwasshotintothewoodblock.Theaverageresistanceofwoodblocksis5000N.Thenthedepthofbulletentryis（）.

参考答案:

0.04m第五章测试Foranisolatedsystem,thetotalmomentumofthesystemisconservedwhenthevectorsumoftheexternalforcesiszero.（）

参考答案:

对Anobjectwithamassof15kgisplacedonthebottomplateofacrane.Ifthebottomplateofthecraneacceleratesupandtheaccelerationis.Given,theimpulseoftheobjectgivenbythebottomplateofthecranewithin2secondsis（）.

参考答案:

360kgm/swhentheimpulseisconstant,thelongertheactiontime,thesmallertheimpulse.（）

参考答案:

对Anobjectwithamassof2kgisthrownupwardatthespeedof10m/swithaninclinationangleof30º,themagnitudeofimpulsereceivedbytheobjectwhenitmovestothehighestpointis（）.

参考答案:

10kgm/sAstaticobjectburstintothreepieces,twoofwhichhavethesamemass,andthesamespeedof20m/swiththedirectionofperpendiculartoeachother.Themassofthethirdpieceisexactlyequaltothesumoftheothertwopieces,thenthespeedofthethirdpieceis（）.

参考答案:

****第六章测试Oscillationcanoccuronlywhenthereisarestoringforcetendingtoreturnthesystemtoequilibrium.（）

参考答案:

对Insimpleharmonicmotiontheperiodandfrequencydonotdependontheamplitude.（）

参考答案:

对SetTastheperiod,.w64932155252s.brush0{fill:rgb(255,255,255);}.w64932155252s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155252s.font0{font-style:italic;font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155252s.font1{font-weight:bold;font-size:76px;font-family:System,sans-serif;}nasthefrequencyand.w64932155282s.brush0{fill:rgb(255,255,255);}.w64932155282s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155282s.font0{font-style:italic;font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155282s.font1{font-weight:bold;font-size:76px;font-family:System,sans-serif;}wastheangularfrequency.Whichofthefollowingexpressionisincorrect（）?

参考答案:

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参考答案:

10s;Insimpleharmonicmotion,theaccelerationaisgenerallyexpressedas（）.

参考答案:

**.w64932155248s.brush0{fill:rgb(255,255,255);}.w64932155248s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155248s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155248s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155248s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155248s.font3{font-style:italic;font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155248s.font4{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155248s.font5{font-weight:bold;font-size:76px;font-family:System,sans-serif;}2cos()aAtwwjp=++**第七章测试Youarestandingontheshoreofalake.Youspotatastyfishswimmingsomedistancebelowthelakesurface.Ifyouwanttospearthefish,shouldyouaimthespear（）.

参考答案:

belowtheapparentpositionofthefishYouarestandingontheshoreofalake.Youspotatastyfishswimmingsomedistancebelowthelakesurface.Ifinsteadyouuseahigh-powerlasertosimultaneouslykillandcookthefish,shouldyouaimthelaser（）.

参考答案:

directlyattheapparentpositionofthefishTheangleofreflectionisequaltotheangleofincidenceforallwavelengthsandforanypairofmaterials.（）

参考答案:

对Theindexofrefractiondependsnotonlyonthesubstancebutalsoonthewavelengthofthelight.（）

参考答案:

对thefrequencyofthewavedoesnotchangewhenpassingfromonematerialtoanother.（）

参考答案:

对第八章测试Thedirectionofpolarizationofanelectromagneticwaveisdefinedtobethedirectionofthemagnetic-fieldvector.（）

参考答案:

错whentheangleofincidenceisequaltothepolarizingangle(Brewster’sangle)thereflectedrayandtherefractedrayareperpendiculartoeachother.（）

参考答案:

对Theunpolarizedlightwithintensityof.w64932155249s.brush0{fill:rgb(255,255,255);}.w64932155249s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155249s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155249s.font1{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155249s.font2{font-weight:bold;font-size:76px;font-family:System,sans-serif;}0Iisincidentontwoparallelidealpolarizers,iftheanglebetweentheaxesofthetwofiltersis60º,theintensitiestransmittedthroughthesecondpolarizeris（）.

参考答案:

**.w64932155280s.brush0{fill:rgb(255,255,255);}.w64932155280s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155280s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155280s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155280s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155280s.font3{font-weight:bold;font-size:76px;font-family:System,sans-serif;}00.125I**Malus’slawisexpressedas:（）

参考答案:

**.w64932155270s.brush0{fill:rgb(255,255,255);}.w64932155270s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155270s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155270s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155270s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155270s.font3{font-style:italic;font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155270s.font4{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155270s.font5{font-weight:bold;font-size:76px;font-family:System,sans-serif;}20cosIIj=**WhatistheBrewsteranglewhenlightisincidentfromglass(.w64932155273s.brush0{fill:rgb(255,255,255);}.w64932155273s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155273s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155273s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155273s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155273s.font3{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155273s.font4{font-weight:bold;font-size:76px;font-family:System,sans-serif;}11.5n=)ontothesurfaceofair(.w64932155259s.brush0{fill:rgb(255,255,255);}.w64932155259s.pen0{stroke:rgb(0,0,0);stroke-width:1;stroke-linejoin:round;}.w64932155259s.font0{font-weight:bold;font-size:260px;font-family:“TimesNewRoman”,serif;}.w64932155259s.font1{font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155259s.font2{font-style:italic;font-weight:bold;font-size:406px;font-family:“TimesNewRoman”,serif;}.w64932155259s.font3{font-weight:bold;font-size:373px;font-family:Symbol,serif;}.w64932155259s.font4{font-weight:bold;font-size:76px;font-family:System,sans-serif;}21n=)？（）

参考答案:

33º第九章测试Theredlightwiththewavelengthof700nmisincidentonthedoubleslitswiththespacingdof0.022cm,andinterferencefringesareformedonthescreenwiththedistanceDof180cm.Whatisthepositionofthesecondorderbrightfringefromthecentralbrightfringe?（）

参考答案:

11.46mmThegreenlightwiththewavelengthof500nmisincidentonthedoubleslitswiththespacingdof0.022cm,andinterferencefringesareformedonthescreenwiththedistanceDof180cm.Whatisthespacingbetweentwosuccessivebrightfringes（）.

参考答案:

4.09mmTherefractiveindexofsoapfilmintheairis1.33andthethicknessis0.4μm.Ifwhitelight(400~760nm)isincidentnormally,whatcolormaythesoapfilmshow?（）

参考答案:

redWhatisthethicknessdifferencebetweentheadjacentbrightinterferencefringesinthethin-filminterferenceofatransparentwedge?（）

参考答案:

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