ph131-HW 1 - PH 131 FALL 2005 HOMEWORK 1 Assigned 50 SHHTS...

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Unformatted text preview: PH 131 FALL 2005 HOMEWORK # 1 Assigned: 08/29/05 50 SHHTS 11 I41 100 SHSETS 21-144 200 SHilTS 22-141 6 CHI—'7 ? Antarctica is_ roughly semicir- cular. with a radius of 2000 km (Fig. 1-5). The average thickness of its ice cover is 30(1)I m. How many cubic centimeters of ice does Antarctica contain? {lgnone the curvatun: of Earth.) ssm _. .1. arr-2» Agu— '— 2 C cm 5:, 774a; VOLUME 1'5 ngam 3‘7): SO SHEETS 22-142 100 SHSITS 22-144 200 SHEETS 22-141 . 0 CHI )0 10 Physicist Enrico Fenni ome pointed out that a standard lecture period (50 min) is close to 1 microoenlury. (a) How long is a mi- crocentury in minutes? (b) Using percentage difference = find the percentage difference from Fermi’s appmxinmion.‘ - .4, room £3; a (scam I MicmmTfi‘l’ ..-: Ix/D Mwukv’ le-EMY f‘r'R lbw T (W) .00, actual 9 é. 50 SHEETS 22 142 100 SHEETS 22-1.! 200 SHEETS 22-h" 331-6 (:44 l '23 ' MRI-L.) ' 23 ' Iron has a mass of 7.87 g per cubic centimeter of voleme, GWEN; I. P = 7' 87 K {O “‘3 andfllcmassofanimnatomis9.27x lfl‘z‘ngflhealomsm M 3' 9.27,!{0‘2‘ spherical and tightly packed. (a) what is the volume of an iron kj atom and (b) what is the distance bemeen the centers of adjacent atoms? m M M55 Mgsbzkxfifl = . VOLUME '. -2; 10“ M .. 9.2“? AND P— ___ = fl — "7.87 200 m3 Mum vat—0M5: pFAroM Ii 3 Vet-Una” 5F A amazes —-=- = 3, 77’F' 50 V E r -Z‘I 3 '5 .40 1— : svj’: 30.:5x20 m = [‘Hx/D M “271’ 5/77) N45: WE A950»: THESE Aw“; A15: __ 5 H5725$ THE can-nae -'T'D—c.¢-_ H'IE' 15-}. BETwEEM AWAs is true?" Twas THE @5105 DR ‘. SO SHEETS 22-"? 100 SHEETS 12-340 200 SHEETS 22-14: 9? s Anambilcmelsonasmighlmdformhnnmm. rxxoTE‘. AVG. val-oerr‘r“ It then confinoes inflicsamedimction foranothcr40kmat u" - 60 kmfh. (a) What is the average velocity of the car during this I3 6} e- M 3‘7, ' ‘80 km trip? (Assume that it moves in the positive x direction.) —_ AX (b) What is the average speed? (c) Graph 1 versus r and indicate V : — how the avenge velocity is found on the graph. ' AT bUZJMGr- FIR-57'" PART-OF 772)? " AX, = H0 kw . ._ AXI __ ‘(Obn -.___ A17 - .7.-- 302; Leak bunme 55'wa “PART 0F 722?: AX; =I1'OLM I '- 41; __ AXI- fl. 901"“ — 0.6714 V2 40%? 5:; FOR. "TOTALTF-Jf’.‘ —— _ AX _ AX 1"sz v m. — or. = =.~~m E AUG. $P££A Is GWEN 35’: g __ 71571:. 331577 : 3'0 1““ = -ANSuER “ AT 2.00 k Apr» 7715 CASE, THE AUG. swab fur-Ms our was file-5% A9 THE AVG- VEL- nLTHouLH 17-735 “5°?- A-f’ 7745' okmu AT Tm; T'=o s) A——-‘ MM 7795- ALG. VELOC—JTV 7795 N535!) LINE - 30 60 Ho 50 SHEEYS 11-141 100 SHEETS 11444 200 SHSETS 22-!41 6 m CHZ “£2 E Ham [ahlllfapanicle’spositionis given byx = 4 — 12: + 3:2 (where tisinseooodsandxis in meters). what is its velocityat r =15? (b) Is it moving in the positive or negative direction of x just then? (c) What is its speed just flten? (d) Is the speed larger or smaller at - later times? (Tl-y answering the next two questions without further mlculation.) (e) Is there ever an instant when the velocity is zero? » (0 Is there a time after: = 3 s when the particle is moving in the negative dinection of .r? 774/5 I'MSTMTArdEoofi vac—oars) rs. Gall/EM 37’ : 5:: AT" T=I§Z sum—E V(T=)s 40/ 327-15 MDWMG- 1” 77"5 N56. X-NR. AT’ 77425, 'T/ME, I. . HE 52:52; 7: Tag;— 774; Noam-rube- a}: nu: wad—awry AT ‘77,”; .1155va , ’VG'fls)‘ =6 Ausuifil 5mm? V(T)=—/Z1—é=TJ we" SEE THAT F02. 0412.25) lvmt DEGREASES FROM 55) = I7" IMA ' AFfiz 7" 25) 5 s _.___.. "" '— 1 E1 was/ 77»: VEWTV Va) :5. NEGAzlw-Z 2:0; . 7”! FOR T>ZS HezMéE/ I >2 ) smear v0) :9 ?oszr)t/E F0): 7‘ SJ 33' 74;;‘6: NEVER MDVE$ ZN //‘"£ _.. AA Kg: PX-D/R. AFTER 11:25. 'rs Atamflnfimcapmfidehadaspeedofwmhinmc posifiuxdirccfimandl4slateritsspeedwas30misinthe opposite direction. What is the average acceleration of the particleduring thi32.4simerva!? 55M C“ V6) (9., runs oat/5 (+229) 7’ '= ”5" “”5 C+ =21”)- z: z “W .._C-") At— :2 - (+12) "I rz—Zo (WI/52"} 50 SHEETS 23 I41 IOU SHEE‘I‘S 22-144 100.5HESTS 22-141 9 61", 2 o"'-- " A’Rk.) S at . An elecuun has a chasm acoeleratim of +3.2 mfsz. At GWEN- 6" = 3'2 S‘- a mum instant its velocity is +9.6 mls. What is its velocit = . 2“— _-(a) 2.5 sudierandag) 2.5 sham? sun y V ‘7 6 5 €3.32ng sync; 77.2/5 .Z'S A CDMSTW AK‘ELEMTIQM wE.‘ M. __'—‘—’__‘+——'-— GA.) 095‘ . 77-!05: _V(1- 2.855 = 9.99:; + (-5.2.Ls‘;\62.85\ :® Wm v(1'=+2.ss\= $513: + C” §‘°1\C*ZSS\=--éfi—”‘—f=— W, .Apmtunmovesalongthcxaxixmdingtomcequation Givern'. X: got +10%1— x=50t+lOt‘.whucxisinmctersandrisinseconds.Czlculate (a) the average velocity of the proton during the first 3.0 s of its Fill/la:- £09 I)“; (3 '0 5) motion. (b) the instantaneous velocity of the proton at r = 3.0 s. and (c) the instantaneous acceleration of the proton at t = 3.0 s. U?) L? C30 5) (d) Graph 1 versus r and indicate how the answer to (a) can be c _ )bt obtainedfmmthcpiot.(c)1ndicatcfltcanswerto(b)onthegraph. L )O- (505) (d) 1310* 04 I' (f)Plott’vetsustandindicateonittheanswcrlo(c). ssrn (Cfln'lAJ‘CflJt-fl Lb) 0Y1 flYfl-Pl" ' ' 3p) Plot- U—t - _._ (so)(s)+(1°) (631‘— o _ 3 50 SHEETS 22 I41 IOU SHSE'I'S 12-144 100 SHEE'I'S 22-141 Q , 2 —-'_,L 106 H/Etd _ Atop-gmpibnwficmgradumoidmmmuvcmismm- IVE-55', -; anally flying horizontally at 1300 kmfh. just 35 m above the level 9—— IA 35 M _ 0 . ground. Suddenly, the plane mcomncrs terrain that slopes gently e - L! .3 upwatd at 4.3“. an amount difficult to detect visyally (Fig. 2-l6). ---'- __ .5 OD How much limesdoesflnpilol have tomakeacorreciimmavoid V "' I % flying into' the ground? u ' F I Mb' A‘l‘ 43° w ————— 35m __ New? wuuaxsron: V=oaw%3('i°°; (31:95 : 360% Magma-.2. “77.11: TE 53641.8 .' _ "TD-£5 pplu‘l" 0F erAc—T' 573).?- POINT- __...._.’ ff")- 22 I“ so SHIN! 224‘! I00 SHEET! 2! I‘d 200 SHIRTS _ CHL’30P 30P- "hem‘uohfiuisgimbyxfim’.wlflezis Mhmmlinmmdtawumvdwfly INGJMIwqu-amhumt- Insulin-2.0:. Thufiad(c)mchmmvuodfiuud(d)flcim munch-lionsuts Insndl*LOs(c)Comp-tthe JWInquumifiuufline-chcmaphin whymelarguoneisluw.(f)0flphxmnndvml. andiufiiuwandnmmmtotnmmughm). - zws GIVE”: xcfi : 2.013 I Til/5' IMSTM'AMEous MEL. Mb ACLEL. ARE was» 159- o-lofiflT—(Z 6,0 (to — l0 H =-m._—é%¥ 3 l a v(1'./.c;) = 6,0 @031 ...
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