University Physics with Modern Physics(12ed)_[Solutions]

《University Physics with Modern Physics(12ed)_[Solutions]》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、1UNITS,PHYSICALQUANTITIESANDVECTORS1.1.IDENTIFY:Convertunitsfrommitokmandfromkmtoft.SETUP:1in.=2.54cm,1km=1000m,12in.1ft=,1mi=5280ft.⎛⎞5280ft⎛⎞12in.⎛⎞2.54cm⎛⎞1m⎛⎞1kmEXECUTE:(a)1.00mi==(1.00mi)⎜⎟⎜⎟⎜⎟⎜⎟⎜⎟1.61km23⎝⎠1mi⎝⎠1ft⎝⎠1in.⎝⎠10cm⎝⎠10m32⎛⎞10m⎛⎞10cm⎛⎞1in.⎛1ft⎞3(b)1.00km==(1.00km

2、)⎜⎟⎜⎟⎜⎟⎜⎟3.2810ft×⎝⎠1km⎝⎠1m⎝⎠2.54cm⎝12in.⎠EVALUATE:Amileisagreaterdistancethanakilometer.Thereare5280ftinamilebutonly3280ftinakm.31.2.IDENTIFY:ConvertvolumeunitsfromLtoin..3SETUP:1L1000cm=.1in.2.54cm=33⎛⎞1000cm⎛⎞1in.3EXECUTE:0.473L××=⎜⎟⎜⎟28.9in..⎝⎠1L⎝⎠2.54cm3333EVALUATE:1in.isgre

3、aterthan1cm,sothevolumeinin.isasmallernumberthanthevolumeincm,3whichis473cm.1.3.IDENTIFY:Weknowthespeedoflightinm/s.tdv=/.Convert1.00fttomandtfromstons.89SETUP:Thespeedoflightisv=×3.0010m/s.1ft=0.3048m.1s10ns=.0.3048m−9EXECUTE:t==1.0210s1.02ns×=83.0010m/s×855EVALUATE:In1.00slight

4、travels3.0010m×=×=×3.0010km1.8610mi.331.4.IDENTIFY:Converttheunitsfromgtokgandfromcmtom.SETUP:1kg1000g=.1m1000cm=.3g⎛⎞1kg⎛⎞100cm4kgEXECUTE:11.3××=⎜⎟⎜⎟1.1310×33cm⎝⎠1000g⎝⎠1mm33EVALUATE:Theratiothatconvertscmtomiscubed,becauseweneedtoconvertcmtom.31.5.IDENTIFY:Convertvolumeunitsfro

5、min.toL.3SETUP:1L1000cm=.1in.2.54cm=.333EXECUTE:(327in.)××=()2.54cmin.(1L1000cm)5.36L3333EVALUATE:Thevolumeis5360cm.1cmislessthan1in.,sothevolumeincmisalargernumberthanthe3volumeinin..221.6.IDENTIFY:Convertfttomandthentohectares.42SETUP:1.00hectare1.0010m=×.1ft=0.3048m.22⎛⎞43,600

6、ft⎛⎞0.3048m⎛1.00hectare⎞EXECUTE:Theareais(12.0acres)⎜⎟⎜⎟⎜⎟=4.86hectares.42⎝⎠1acre⎝⎠1.00ft⎝1.0010m×⎠222EVALUATE:Since1ft=0.3048m,1ft=(0.3048)m.1.7.IDENTIFY:Convertsecondstoyears.9SETUP:1billionseconds110s=×.1day=24h.1h=3600s.9⎛⎞1h⎛⎞1day⎛⎞1yEXECUTE:1.00billionseconds=×()1.0010s⎜⎟⎜⎟

7、⎜⎟=31.7y.⎝⎠3600s⎝⎠24h⎝⎠365days1-11-2Chapter17EVALUATE:Theconversion1y=×3.15610sassumes1y=365.24d,whichistheaverageforoneextradayeveryfouryears,inleapyears.Theproblemsaysinsteadtoassumea365-dayyear.1.8.IDENTIFY:Applythegivenconversionfactors.SETUP:1furlong==0.1250miand1fortnight14

8、days.1day=24h.⎛⎞0.125mi⎛⎞1fortnight⎛1day