# Quiz3C - Quiz 301 DL Sec Last 6 digits of student ID First...

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Unformatted text preview: Quiz 301 DL Sec _ Last 6 digits of student ID: : First three letters of your family name 1. An ice cube at T : —1°C’ drops vertically from the top of a 250m tall building and eventually hits the ground (Le. ﬁnal speed is zero}. During the process the ice cube cannot exchange heat with the environment. (a) Find the ﬁnal speed of the ice cube right before impact with the 0931- DKB :O W “RCA“ 1. 4- ”we. —-l . I ‘ Fireﬁght + ill-(Vito :0 w), ; 16“» (b) After the impact, do you expect the temperature of the ice cube to increase, decrease or stay the same? Explain brieﬂy. Siege MS is 09¢on inﬁrm) M W lLvlucIL‘c WT \mkl log, Troutom Ms “W eye/u“, and TR Tau/(MW Wd‘ Wt (c) Using the energy conservation principle determine if the ice will start to melt after impact or not (if it C does, do not calculate how much). t "— OtE‘r QEm-«O WWW +wqblzo 0.11le ~— QT: Vol "’ A LDC, ﬁeuwgla to ’leacll/k “1 WM rtﬂund. [ 5'. - ZCS ' 99*“ :5 \{cL it wAl Wsmwclivi 1. A spring with spring constant k : 0.25 J/m2 has one end attached to a fixed wall and the other end attached to a mass of 13:9. The massspring system sits horizontally on a table and the mass is initially in its equilibrium position. You then compress the massspring system and let it go. The mass starts oscillating around its equilibrium position. Consider the system as closed (ie. no friction or exchange of energy with the environment). At some point you notice that the speed of the mass is 2101/3 and the distance from its equilibrium position is 1m. (a) What are the K E and the 13133?er at thistoint? be 3 {wk tong Quin) ; e .l rt“ 2. Lu” —_ {148: 4,: [0.25:th om .l wb (b) Is the total energy of the system constant or not? Explain brieﬂy. Ya time \T's a dead SL5&:QUA Coo T~£;\Ci—LQIU l Fro? —_ COURT.C 23+ 0451': 2418 I In“? ’ {e C (c) By how much did you compress the mass-spring system initially? ‘LMTMB bﬁon «Jami Us WM '. a > ' “j 0 3;; 211753 *_ H __ I 2"?” can Ell-31, = {U “V ‘— 2‘ \$ ik‘ﬁtz ?.\1‘3—b Some numbers you might need: )4 z Ll _ l MA Melting temperature of water-20°C, Speciﬁc heat of ice=2.05 kgj’jw, g=9.81§”§ P Egravitational : mgh K E : %mv2 Last 6 digits of student ID: First three letters of your ’ family name 1. An ice cube at T : —1.1°C drops vertically from the top of a 270m tall building and eventually hits the ground (i.e ﬁnal speed is zero). During the process the ice cube cannot exchange heat with the environment. (a) Find the ﬁnal speed of the me cube right before impact with the ground. 0 DQ‘I B1: = %— “all. + H311 Ug- « ﬂash +OL34V¥1Q r25 \fg: - (b) After the impact}, do you expect the temperature of the ice cube to increase, decrease or stay the same? Explain brieﬂy. I h Sludk This is at (wsd ClﬁgT-UM TR lLuAch. email wrtl 10L Cow‘Qd—Jrk \VWSR‘EM NM? )ThcwME W31 So it Tet/(«mum null and “l" (c) Using the energy conservation principle determine if the ice will start to melt after impact or not (if it does do not calculate how much) _ QT: 3V3 " 4 wt C, 4(- \MOR Thau icuwfhlo 1m 1C5 : Ten/«2,11% (GUM 5m \(Ctﬂ uwdlSlcvl/t 19 W ! 1 A spring with spring constant k: D 5Jr/rn2 has one end attached to a ﬁxed wall and the other end attached to a mass of 21:9. The mass—spring system sits horizontally on a table and the mass is initially in its equilibrium position. You then compress the mass—spring system and let it go. The mass starts oscillating around its equilibrium position. Consider the system as closed (Le. no friction or exchange of energy with the environment). At some point you notice that the speed of the mass is 1171/3 and the distance from its equilibrium position is 2m. (3.) What are the KB and the PE... Wing at this pLoint? lbt‘ — 3WV1;:(ZH)[\WS)= __ 'L n"— l t P? LK‘F HOS-LL) (2124): (b) Is the total energy of the system constant or not? Explain brieﬂy. YEA Slum We 13 NO RAVlC/Tkrovx ME 35am :3 cool?!) Cong/H.173 lsi-kc; 23- \oT - (c) By how much did you compress the mass-Spring system initially? TWUJKOMA} %on W & ﬂceeuKIW-ﬁ 11" WI: Some numbers you might need: Melting temperature of water=0°C, Speciﬁc heat of ice:2.05%1 ¥ 2/ Q -8 M g=9.8§”g PEgrau‘itatémml = mgh KB 2 %me2 Quiz 3D 2 DL Sec Last 6 digits of student ID: : First three letters of your family name 1. An ice cube at T = —1.0°C drops vertically from the top of a 180m tall building and eventually hits the ground (i.e ﬁnal speed is zero). During the process the ice cube cannot exchange heat with the environment. (3.) Find the ﬁnal speed of the ice cube right before impact with the ground. o 0 CLOSED 395573 :3 QPETBtA=O :11) %-??i +£Ef~ £10 59 ;M%ki+ttﬂvlezo —B v£:.lzﬁh£\$/ SOLA‘? (b) After the impact, do you expect the temperature of the ice cube to increase, decrease or stay the same? Explain brieﬂy. ‘ I h \ A BLUAS on closed stage“ The kinetic wax WI.“ lee (Wtdﬂ mug ) . Thmwd—Q with and Th Temfwdim wet thwart ‘, @@ t ‘4 szo (c) Using the energy conservation principle determine if the ice will start to melt after impact or not (if it does, do not calculate how much). 0 R. bk? 1 BR : O {W— ‘%I§/V: + KC; tit-‘4): O . v, M‘ I ﬁt ‘ A. So AT : VA} _ ‘o.8€°(,i MT enough Ta acacia “(W vow 2% 1. A spring with spring constant k : 0.5Jr/m2 has one end attached to a ﬁxed wall and the other end attached to a mass of 1169. The mass-spring system sits horizontally on a table and the mass is initially in its equilibrium position. You then compress the mass—spring system and let it go. The mass starts oscillating around its equilibrium position. Consider the system as closed (Le. no friction or exchange of energy with the environment). At some point you notice that the speed of the mass is 0.25m/s and the distance from its equilibrium position is 1m. (a) What are the K E and the PEmﬂg at this point? a. ._ 1. - Iww - \ .sua : ,03U3J Kt: ._ Ztlkﬁ)(01 s) O l '2. ——v L P 95,. tut = L (05-h) (Mi = 0'28 ’ (b) Is the total energy of the system constant or not? Explain brieﬂy. Yes ) Siam ﬁle/m Is No Qu‘u‘rau‘ (c) By how much did you compress the mass—spring system initially? it: 7 use: 0.03sz 3 «— gig-j; Gimme? A 7. O _ ’-—. "mum 2- _ PE 95“ s owm =9 i“ 0'18”“ are, macaw.“ ‘0‘ - ‘9 Some numbers you might need: .2; AL 06 M Meltiggg temperature of water=0°C, Speciﬁc heat of ice:2.051:;%K, X ' ' PEgravitational : mgh’ KE : émvg Grading: Last 6 digits of student ID: Name: First three letters of your family name 1. An ice cube at T : —1.1°C' drops vertically from the top of a 200m tall building and eventually hits the ground (i.e ﬁnal speed is zero). During the process the ice cube cannot exchange heat with the environment. 0 (a) Find the ﬁnal speed of the ice cube right before impact with the ground. 0 . ﬂ _ CWS'U“) SQS‘ﬁrh —==o Nanette-do ==s ﬁ—oa 'r mi»- i=0 _wﬂ'l’1£1—‘LWVQ=° ==° vi. Jae 1» .. 62.6% (b) After the impact, do you expect the temperature of the ice cube to increase, decrease or stay the same? Explain brieﬂy. I A 8(3th CL ClOid 5056:8qu ) “t \lecfllc Gabi/it ujlll lot come/Med MB “wad; W3 pour/L TR TWW Wt“ f0 u( l (c) Using the energy conservation principle determine if the ice will start to melt after impact or not (if it does, do not calculate how much). \0 L _ thi—QE—nazo Mill/MU; ’r WCKBl \$0 _ L _ __ ,_ ,— . N Z V” = 0-6“) ‘C Nal enough W ”640\$ “(“ng LCs fowfl 1. A spring with spring constant k = Ll/m2 has one end attached to a ﬁxed wall and the other end attached to a mass of 2kg. The mass—spring system sits horizontally on a table and the mass is initially in its equilibrium position. You then compress the mass-spring system and let it go. The mass starts oscillating around its equilibrium position. Consider the system as closed (Le. no friction or exchange of energy with the environment). At some point you notice that the speed of the mass is 0.5m/s and the distance from its equilibrium position is 0.5m. (a) What are the K E and the 131'333m-ng at this point? L6,. Luz“! _- L(®(0-5\1ﬂ 2 0.7231 W: 9W1: L(‘g~ll0-WT= 0““- (b) Is the total energr of the system constant or not? Explain brieﬂy. Yes! s m a The Ia 0L '9) mousing 33mm (CLOSED) Ere: 2. CoMRTANT (c) By how much did you compress the mass-spring system initially? "‘3‘. = @QS—HLF; ®,L§+ out”: 0.3%? o BJWTW ) Lakeie aeQeagidg'ﬂt mass Some numbers you might need: Melting temperature of water-20°C, Speciﬁc heat of ice=2.05#, :98,” tax“ Mg: 0.31M g - g: PEgrav'itational : mgh KE : Elﬁn?)2 (‘i 1‘st Q5 ﬁg ; oi3¥§l SD ik¥1= 0.115 3— ...
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