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Exam. 1 Physics 1 i 14 Fall 2009Use Pencil, NOT PEN. Erase Jncorrect answer completely. Mark an answer by filling in the space between the brackets completely, e.g. (0)DO NOT CIRCLE ANSWER! If A is your answer, then mark the number within 10% of A; that is: if one of the multiple choices listed is"greater than A/l.1 and less than 1.1 oA",'tben that choice is correct; otherwise mark "(0) Not Given"•

0te: f- = ]fits; P" = ]oq.Z; n- = 10"9;p- = ]O'S; m- = ]0"3; k-= IO3; M- = 106; G- = ]09; T- = 10 tz_/._L_.)_I _hrow.s a b_dl directly upward with a velocity, of +5 m/s. Find itsposirlo/n (in m) 1.3 s later._sst_ne the zero of position is at Dr. l's hand.] _ ._._.)/-8.3; ( ) +16; , ' II_ +6 5; .Z#_ -1 8; " ( ) not given

Find the gravitational !'orce (ha kl_l) on a 6.10 t4 kg comet that is 5 •10 tS,m from the 2- 103° kg sun._l_ 3.2; ( ) 59; ( ) 2.4; ( ) 5.8; ( ) not given

3 r=t-'l- . • _lO .The combination of units IN-s/(m.kg)] is Equ_alen'_to (i.e. the same as)the unit(s):( ) s; ( ) s/m; _ l/s; ( ) N2; ( s-kg 2

Find "g" (in rnls ) on PlanEt Honywood _nere an astronaut wEighs ft60 N if she weighs 750 N on earlh.

(,),j6;, . _ _ 6.0; , ." . ( ) 47; , ()77; : (.)_ notgiven

,d 820-N Dr R is sleeping m a 210-kg bed. Find the (normal) force (m kN)'thE floor exerts.9..O,fl_e bed." _(,_'-_,82; ' ( ) 1.2; "I 2.1; ( ) 9.2; _)_rnotgiven

.(/ _ L Bdr_ ties a rope around 9S0-NDr. I's neck and pulls the good doctor _vith an 1]00-N force up to

/ "_' t_e.?_,o/p'_ofthe Clock "rowi,. FindDr. l's acce]eration.fl7al,_"(inm/s2).a_L_,q IC

_'1.5; _ 11; () 21; " ," ( ) 97; ( ) notgiven '

,'_._wi_so_P I_c0_ o,-? lioo (c,tca,_)o--ga.. (_orce ('in Zde tO air r?si:t_<i<o_am;eaf falling with a TE_IN_ velo(_iW of 1 3 m/s "=_

_.._29; . _) 0.0; ,. 7_"2_ . , . () 3.9; (>. not'given" ,

If the force between two l-kg potatoes a [tistance D apart is 8 nN, find the force (in nN) bEtWEEntwo 2-kg melons the same distance D apai't.. r

• ¢ 2, ' _ .( ) 4.0, Ill 3 , _ . ( ) 2.0, ( ) 8.0, ( ) 16

({ _[I yqd drive the firs! 120 _._.%of a 470-at_jl_trip in 3 _.how fast _m,_./_(must you drive the remainder._ jof-thE trip il" the total trip takes 8 h? " ! i , • . .'_ _(_2-5;--_ _lll" 70; ( ) 57; ,_K_-f 31'; C) not given

he NET force (in kN) on a 76,O00-kg plane flying 180 m/s directly east'at an aliitude of "O0_m,00; ( ) 740; (). 350; ( ) 420; " ot given

•. I_,C_%0__

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A rocket goes from 75 miles per hour io 350 miles per hour in 9 s. Find its acceleration (in m/s 2)( ) 120; .,1 .) .31; , lu_ _ 14; ( ) 22; _ ( ) not given

"4.=="q. r.. ,'¢,_,_ ...-_'_ _ _"_'_TT"-'_ _L._,__.._ • 2.f2._ _' _ _"'_ e'_._-'_-_

A skydiver drops out'of a hovering-helicopter and falls freely. Find his velocity (in m7_-3.4 s later.D 33; ( ) 9.8; ( ) 25; ( ) 57; ( ) not given

Find the centripetal acceleration (in m/s') Of _i-_.5"-k_ball traveling ]2 m/s in a 1.S-m-radius circle.( ) 38; ( ) 48; lid 96; __L_8.0; ( ) not given

14 Oc=VZlr /I,9 --On frietionless ice, 85-kg Dr I kicks a 4-kg box accelerating it at 2.6 rn/s 2. Find Dr I's acceleration (in m/s2).

0.12; ,- ( ) 10; ( ),, 2.6; ( ) 0.098; ( ) not given

P" _ Se.l_ct the number below that most accurately represents the distance Iraveletl (in m) between lhe"_'_maes_= 5 s and t = 9 s by the object whose velocity vs. time graph is I_i4_ in Fig. B.

_.._..._(_-')'_70; _ 5.0; () 55; (_40; () 30

5_el_el:'the number below_that most accurately represen{s the instantaneous velocity (in m/s) at the"----'-time t = 9 s of the objc_:_whose position vs. time graph is given in Fig. A.

( ) -20; /_--0 -10; Q +1.1; ( ) -2.5; ( ) +10

Find the acceleration (in krn/s 2) of a ''_01.7- -27kg proton thai experiences a net force of 3.9.10 -24 N.

( ) 0.44; ( ) 6.6; () 4.4; ( ) 3.2; _ nolgiven

18 _t:.2, _ rID" {_,,J GL:- _2¢{L_' Ig3/gZ_ Wc£'o 22V[0_Select the n_nb'er below :ha most accurately represents the average acceleration (in m/s 2) betweenthe times t = 7 s and t = 12 s of the object whose velodty vs. time graph is given in Fig. B.

+3.0; -2.o; +1.% >%-_t:qS vl : % rqlg V_-us _ lO-_ :

How far (in m) does a glacier travel in one year ff its average velocity is 1/8 of an inch per hour?( ) 900; Ill 28; ( ) 0.0032; ( ) 74; ( ) not given

20 v ,'6 ,n _'lgr !lI,_ If4" 1_4" _r _l_r,5 "'/<_IIf 64 mile = 1 caral, I caral -- 0.29 obol, _md 5.8 obol = I dinar, how many din&_ is 3700 mite?( ) 5.5; ( ) 1300; ( ) 34; _ 2.9; ( ) not given

Fig. A Position vs, Time Fig. B Velocity vs. Time

30 25"g2s _": 20 --E 200"r-, 15 ._. 15o 10 o 10

5 > 50 0

0 1 2 3 4 5 6 7 8 9 10 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15Time(s) Time(s)

_please Sit n Seat "_ "

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•' _;,. * Score2

Exam 2 Physics 1114 Fall 2009Use Pencil, NOT PEN. Erase Incorrect answer completely, Mark an answer by filling in,the space between the brackets completely• e,g. (o)DO NOT CIRCLE ANSWER! If A is your answer, then mark the number within 10% of A; that is: if one of the multiple choices listed is"greater than A/1.1 and less than 1.1.A', then that choice is correct; otherwise mark °(@) Not Given'.

Note: f- = 10qs; p- = 1012; n- = 109; p- = 10"6; ml- = 103i k- = 103; M- = 106; G- = 109; T- = 1012, •t 4)

1

At S_ Rags over Norman, Dr, I starts from rest at the top of a _'JcHon]ess slide, How high (in m) is theslide ffhe is traveling 10 m/s at the bottom of the slide?_ 5.1; ( ) 0.54; ( ) 4.0; ( ) 10; () needhismass2

Find the NET force (in kN) on a 1.2-m by 0.5'-m window on the space shuttle when it is 'in orbit if thepressure inside the shuttleis 0.6 atm.. : . ,() 3.6;/ () 61; ( ) 47; (_ 36; ,, () no(given

the following has the smallest volume:

_ llkgofiron; ( ) 14kgoflJrass; _) 8kgofwater; ( 7kgofice; ) 20kgoflead

Find the force (inN) required to load a 75-kg box on a 1.5-m-high truck using a 6-m-long frictionless ramp.() 11; () 240; C_ 180; ' ) 19; ) n0tgiven'

Find the pressure (in PJ_/rn 2) needed to ift a 48-kN truck using hydraulic lift with a 0.25-m-radJfis pistbn: .....( ) 61;. 0 240; . ( ) 770; ( ) 2400; . ( ) not given

• epPr(e'msumm) ac_fel_e D ,sDr I, ifth e ssure on is 2

Traveling 17 m/s, Dr. !'s 1300-kg car collides with Prez Boren's stalled 3700-kg truck locking bumpers. .Find the fmal speed (in m/s) of the Dynamic Duo assuming no brakes were set. •'(') 6.0; (_ 4.4; ( ) 13; _ ( ) 17; ( ) notgiven

How much does eJecl_JdW cost (in t/kWh) ff you spend $1.25 to operate a 1.4 kW heater for 12 h?( ) 2.5; () 9.5; (.) 34; 1_ 7.4; () not given .

9

What pressure (in kN/m 2) does a 65-kg ballerina exert on the floor standing on the 7-10 .41312 tip of her shoe•

-Q 910; () 34; () 640;. .() 93; () not given

10" _ . .A 2.5-kg ball travelling 5.5 m/s hits a wall and bOunces away from the wall with a speed of 3.5 m/s.Find the impulse (in N- s) that the wall exerts on the ball if it is in contact withthe ball for 0.25 s,() 14; ) 90; () 5.0; _ 23; ()not given

I

446240• Last Name ......... ; IO # X X _( - X X -- .........

11Which

of_ foUowing set of characteristics describes a liqmd: {O-compressible, _ot easily CO_lpressed;@-rigid_ _lows readily;, ®-sta'ong forces between atoms)._)-very weak forces between atom • ® tomsclose tog_her; ®-atoms far apart; ®-atoms only vibrate ___*--atomsreadily move about}() ®,®,®,_; () ®,®,®,®; _ ®,®,@,@; () ®,®,®,®; () ®,@,®,®12Initially at rest on a frietinnless frozen pond with a 5-kg bowling ball, 85-kg Dr. I throws the ball towardthe far shore with a speed of 2.3 m/s. What is Dr. I's Final speed (in m/s)?(D 0.14; ( ) 0.18; ( ) 2.3; ( ) 12; ( ) not given

13Find the NET work (in MJ) required to accelerate a 2400-kg rocket from rest to 130 m/s.( ) 15; () 41; () 0.31; Q 20; () not given

14How much work (in MJ) can a 1.5-hp (horsepower) motor do in 3 hours?() 21; () 3.6; ( ) 1100; () 16; _) not given

15 I_,_ M:5Find the kinetic energy (in MJ) of a 1300-metric-ton ocean liner txaveling 6 m/s. [1 metric ton = 1000 kg]( ) 47; ( ) 18; _ 23; ( ) 7.8; ( ) not given

16Using Fig. A, the graph of gauge pressure (in alma) vs. depth (in m), select the answer below that mostaccurately represents the _ in pressure (in kN/m 2) as you go from a depth of 1.8 m to 7.3 m.( ) 65; (_ 120; ( ) 160; ( ) 90; () 40

17

Find the mass density (in kg/m 3) of Ryanite ff a 33-kg cube of it has an edge of length 0.15 m.( ) 2_20; () 7500; () 1500; _ 9800; () not given

18Find momentum (in kg- m/s) of a 2.5-gram leaf falling with a velocity of 1.7 ft/s.

• O 0.0013; () 4.3; () 0.52; () 0.0043; () not given

19A 7.2-kg bowling ball falls off a 0.85-m-high table hitting the floor. How much work (in J) couldbe done by the bowling ball as it hits the floor.() 4.1; () 6.1; _ 60; ()2.6; () not given

_ta_ting from rest with 42 kJ of potential energy atop the Clock Tower, Dr I slides down the side of thetower. Find the work (in k J) done BYDr. I if he hits the ground (where PE =0) with 17 kJ of kinetic energy.( ) 32; ( ) 52; ( ) 42; ( ) 17; _ not given

Fig. AGauge Pressure vs. Depth

jill_ 1.2_0.8 " ii J J

IItll0 ! 2 3 4 5 6 7 8 9 10

Depth (m)

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(_) 9:30 Signature mygrades!exam ' C)C) 10:3o Icertifythatthl, . Is entlrely my own work and that l have nedher gwen nor recelved help on thts exam

Section. Student lD Number 8'O Q-/ Q- _ Ecoarm:. _L_0

Exam 3 Physics 1114 Fall 2009Use Pencil, NOT PEN. Erase Incorrect answer completely. Mark an answer by filling in the space between the brackets completely, e.g. (o)DO NOT CIRCLE ANSWER! If A is your answer, then mark the number within ] 0% of A; that is: if one of the multiple choices listed is"greater than A/I. l and less than 1.1 oA", then that choice is correct; otherwise mark "(e) Not Given".

Note: f- = 101s; p- = 1012; n- = 109; II- = 106; m- = 103; k- = 103; M: = ]06; Go= 109; T- = 10 Iz

1Changing a light bulb while standing on a damp floor, Dr. I experiences a 440-V. potential differencebetween his hand and feet. If his total resistance is 3.5 k.O, win he experience (_,) discomfort; ( ) musctdarcontraction;- ( ) difficulty breathing; _ ventricular fibrillation; or ( ) irreversible heart damage?

Find L., the latent heat of fusion, (in kJ/kg) of Indestructum ff I 3 MJ of energy is needed to melt 4.5 kgI

of Indestructum at its melting point of 7 °C.( ) 380; '( ) 660; ( ) 42; _ 290;- ( )notgiven:

3Find AU, the change in the internal energy, (in k J) of an ideal gas if the work done by the gas is 4.5 kJwhile 2.5 kJ of heat is removed from the gas: • "( ) +4.5; _ :7.0; ( ) -2.5; ( ) +2.0; ( ) not given

Find the repulsive force (m naN) between +6 nC charge and a +4 nC charge that are 5.4'mm apart.( ) 5.4; ( ) 40; " ( ) 11; _ 7.4; ( ) notgiven

5

How much hauid water lin kq) at 100 o can be produced by removing 5.6 MJ from steam at 100 °C?2.5; . () 17; ( ) 9.7; () 1.3; ( ) notgiven

Which of the fogowimg is the smallest fuse (rated m A) that will operate a 1200 W heater on 67 V?( ) 7.0A • ( ) 9.0A; (). 67A; (') 14A; _ 20A

7 '

Find the Fahrenheit temperature that corresponds to -8 °C.( ) -72; ( ) -22; _) +18; ( ) +13; . ( ) not given

8• If the force b_tween two equal charges Q a-distance d = 2 m apart is 18 nN, what is the force (in nN)when the charges are a distance D = 6 m apart?,_ 2.0; -( ) 160; ( ) 6.0; ( ) 54; ( ) 18

9

How much heat (in kJ) is required to raise the temperature of 7-kg of concrete from 20 °C to 70 °C?( ) 350; ( ) 1500; _) 240; ( ) 670; ( ) notgiven ._

10Find the resistance (in [_) of a potato if 1.3 A of current flows through it when it is connected across

• a 45-V battery.() 26; () 0.029; () 59; _ 35; ) not given

446501

11

HOWmuch heat (in kJ) is required to produce 2 kg of water at 65 °C from 2 kg of ice initially at 0 °C?( ) 1600; _ 1200; ( ) 670; ( ) 530; ( ) not given

' 12 ,,,How much charge (in C) flows through a 27-H resistor in 15 minutes if the current in it is 0.73 A?() 20; () 900; ( ) 410; ( ) 11; _ not given

13An iron pipe is 530 m long at -5 °C. How much longer (in m) is it at 25 °C?

'_ 0.19; ( ) 12.10-6; ( ) 0.30; ( ) 0.13; ( ) not given

_.._..2,, 14"f How much energy (in GJ) is dissipated when 13 C of charge flows in a lighming bolt that flashes across

a cloud-to-ground potential difference of 270 MV?( ) 4.8; _ 3.5; ( ) 21; ( ) 1.4; ( ) not given

15

Find the net charge (in nC) m Dr. I's pocket flit contains 4- 1012 electrons, 950 protons, and 760 neutrons.(i_ -640; ( ) -2100; ( ) +880; ( ) +96: ( ) not given

16

Find the peak AC voltage, V ,, (in V) if the effective alternating voltage, VRMs, is 67 V.( ) 130; ( ) 36; pea_ _, 95; ( ) 47; ( ) not given

17Find the resistance (in H) of a 75-W light bulb that operates on 67 V.( ) 0.89; ( ) 75; ( ) 1.1; ( ) 5,000; _ not given

18Using the graph of voltage vs. current (in mA) in the resistor R given in Fig. A, select the answer thatmost aeeurately represents the power (in roW) dissipated in R when the current through R is 7 mA.( ) 53; ( ) 4.3; ( ) 30; _ 210; ( ) 150

19

Find the current (in mA) through R1 = 360 H in Fig. ll if V0 is 18 V.( ) 530; ( ) 6.5; _ 50_ ( ) 900; ( ) not given

20Which of the following takes the largest amount of heat to raise 2.5 kg of it from -25 °C to +15 °C?() lead; () iron; () copper; () silver; @D concrete

Fig. A Voltage (in V)vs Current (in mA) --Fig. [_40

2+ '>_ 30 j .-,.-_

m 20 E _/

-[=> 10 ./.._/

00 1 2 3 4 5 6 7 8

Current(mA)

I''e''°'''n'°at,-,_ .. M106.,";. ...... 446732

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O 9:30 Signature mygradesl(_) 10:30 I certifythatthisexam isentire_'Y7n_ownworkandthatI have neitherg,vennor rece,vedhelpon thisexam. (_)

Section. StudentID Number _ Exam _ •Score:

Make-Up Exam Physics 1 114Use Pencil. NOT PEN.EraseIncorrect answer completely• Mark an answer by filling in the space between the brackets completely, e.g (O)DO NOT C RCLEANSWER! If A is your answer, then mark the number within ] 0%of A; that is: if one of the multiple choices listed is"greater than A/1.1 and less than 1.1-A" }hen that choice is correct: otherwise mark "(o) Not Given".

Note: f- = t0"t s; p- = 10"t2;n- = 10"9;p- = 10"6;m- = 10"3;k- = 103; M- =,106; G- = 109; T- = 10 ]2

"_1 "

On frictionless ice. 80-kg Dr I kicks a 3-kg box accelerating it at 3.4 m/s 2. Find Dr I's acceleration (in.m/s2).(1 3.4; ( ) I0; _ 0.13; I ) 270; ( ) notgiven

2C "

Find AU,"the change in the internal energy, (in kJ) of an ideal gas if the work done by the gas is 7.2 kJ"while 5.3 kJ of heat is added to the gas.

_ +13; ( _ -9.1; ( } +5.3;. ( ) -7.2; _1 not given -

-3 -.

Which of the following is the largest ll0-V heater (rated in W1 that will operate on a 9-A fuse?,( ) 110; ( _ 1500; _ 800; ( ) 650; ( ) t200 ....

4How deep (in m) below the surface of'Lake Dirtybird is Dr.-I. if the total pressure on-him is 180 kN/m 2and the pressure at the surface of the lake is 1 atm?

() 1!;/,_,. . . . ( ) 4.0; ( ) 11:._.. g) 8.1; • • ( ) notgiven -, _

Drai'throws a ball directly upward with a velocity of +9 m/s. Find its velociW (in _/s).:l.2 s later._t_'f_ -2.8;: I ( ) -8.4; ( ) +3.7: " (,) -12; II_ uotg]ven

" L • ,md th_ r.,=_ut.uo,,al ,v_.ee _m '- --_ : _ ;--"_,_, _ctwc_ = o-iu kg rock auu a oo-KV,ooy, which are 25 m apart. .) .A_#} ,

( 340; , j_,_, 30; ( ) 43; _., () 750; _1 not given:7 . _rv " J , :

Find the resistance (in D) of a potato if 3.2 A Of current flows through it when it is connected acrossa 90-V battery:( ) 21: ( ) 290; ( ) 0.036; m 28; ( ) not giveia8How much does electricity cost (in e/kWh) if you spend $2.75 to operate a 1 8 kW heater for 20 h?a17.6; ( ) 36: ( ) 9.5; ( ) 6.1; ( ) not given

9 • 'tol " " 7HOWmany electrons must Dr. I remove from a piece of paper /eave it with a net charge of +.45 ttC.

" ( ) 7.2-10-24; ( ) '1.6"i0"19: ( ) 8.2- 1014; (t_ 4.5.1019; .,_{J_J"nOt given :/10

A 0.8-kg ball traveling 4 m/s hits a wan and bounces away from the wall witfi a speed of 3 m/s. " 'Find the impulse (in N- s) that the wall exerts on the ball if it is in contact with the bail for 0.25 s.( ) 3.2: _ 5.6; () 0.80; ( ) 22; () not given

,. 446732) Last Name ________._[/[J_.__........... ;,o # x x x-xix- _/q _q_/..... •11 - .

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Find the acceleration (in km/s 2) of a 1.7- 1027 kg neutron that expd'/ences a net force of 2.3- 10 -23 N.

() 740; .+'{! 32i., _,: (> 470; , 14; (' notgiven12

How much heat (in kJ) is required to produce 1.8 kg of water at 55 °_.__Cfrom 1.8 kg of ice initiaUy at 0 °C?1000; ( ) 780; ( ) 600; ( ) 410; ( ) not Oven

13

Pres. Born ties a rope around 890-N Dr. I's neck and pulls the good doctor with an 970-N force up tothe top of the Clock Tower. Find Dr. I's acceleration (in m/s2).( ) 11; ( ) 1.1; ID 0.88; ( ) 0.66; ( ) notgiven

14

What pressure (in kN/m e) does a 45-kg ballerina exert on the floor standing on the 9.10 -5m 2 tip of her shoe.( ) 440; ( ) 3,600; ( ) 580; O 4,900; ( ) not given

15

Find the kinetic energy (in MJ) of a 900-metric-ton ocean liner traveling 6 m/s. I1 metric ton = 1000 kg]( ) 23; m 16; ( ) 5.4; ( ) 32; ( ) not given

16

A rocket goes from 35 miles per hour to 170 miles per hour in 5 s. Find its acceleration (in m/s 2)( ) 27; ( ) 60; ( ) 16; ( ) 21; _ not given17

Find the force (in N) required to load a 250-kg box on a 1.5-m-high truck using a 7-m-long frictionless ramp.O 530; ( ) 400; ( ) 3700; ( ) 54; ( ) not given

_18A skydiver drops out of a hovering helicopter and falls freely. How fN:,(in m) does he fall in the first 1.5 s?

D 22; ( ) 29; ( ) 15; _ 11; ( ) not given19Find the NET work (in MJ) required to accelerate an 1800-kg rocket from rest to 95 m/s.( ) 16; ( ) 170; _ 8.1; ( ) 11; ( ) notgiven

20

How much heat (in kJ) is required to raise the temperature of 4-kg of concrete from 20 °C to 130 °C?_ID 300; ( ) 450; ( ) 1800; ( ) 670; ( ) not given

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O 9:30 Signature rnygra_slO 10:30 I certff'/thatthisexamis entirelymyownw_'kandthatI havene_er givennor_ help_ _m e_m. 0mmm-mm-©©©©9:30 Final Exam Physics 1114 Spring 2007 ExamScore: /20Use Pencil ,NOT PEN.Erase Incorrect answer completely. Mark an answer by filling in the space between the brackets completely, e.g. (O)DO NOT CIRCLE ANSWER[ If A is your answer, then mark the number within 1G_of A; that is; if one of the multiple choices listed is"greater than A/1.1 and less than 1.1,A', then that choice is correct; otherwise mark "(O) Not Given'.

Note: f- = 10"Is; p- = ]0"n2; n- = 10-9; p- = 10"6;m- = ]0"3; k- = 103; M- = 106; G- = 109; T- = 1012

Water Data: D = 1000 kg/m3; D = 62.4 lb/ft3; C = 4.184 kJ/(kg-°C); I4 = 334 kJ/kg; Lv = 2260 kJ/kgt• mg •t,_

I-_Freely fall 9 m/s, skydiving Dr. 1starts his stopwatch. How far (in m) does he fall in the next second?( ) 19; _ 14; O 4.9; ( ) 9.0; ( ) not given

2What is the power rating (in kW) of a crane that can lift a 30-kN box a height of 5 m in 20 s?( ) 150; ( ) 74; ( ) 5.8; _ 7.5; ( ) not given

3Find the cost of electricity (in ¢/kWh) if you pay $2.40 to operate a 3-kW oven for 9 h.O 8.9; () 6.5; () 12; ( ) 27; ( ) no]given

4

How deep (in m) are you below the surface of L',_keSuperior if the gauge pressure is [.5 MN/m z?( ) I00; ( ) 250; _ 150; ( ) 200; ( ) notgiven

5

Initially traveling 17 miles/h, Dr. I accelerates to 75 miles/h in 7.4 s. Find his acceleration (in m/s2).( ) 7.8; ( ) 26; ( ) 4.5; O 3.5; ( ) not given

6Find the voltage (in V) across a 750 _2 resistor if the current through it is ]8 mA.( ) 18; ( ) 0.24; ( ) 42; ( ) 24; " e not given

7

Find the volume (in m _) of a 4100-kg rock that has a density of 2300 kg/m 3.( ) 0.56; ( ) 940; _ 1.8; ( ) 2.3; ( ) not given

('_FSi)ndthe voltage (in V) required to operate a 3.6-kW oven that has a resistance of 13 [2.220; () 170; () 47; () 3.6; () notgiven

9Find the attractive force (in pN) between an electron and a proton separated by a distance of 13 nm.( ) 0.22; _ 1.4; ( ) 1.8; ( ) 18; ( ) not given

10Find the peak AC voltage Vpeak (in V) if the effective voltage VRMS is 47 V.( ) 24; ( ) 94; ( ) 33; ( ) 47; _ no]given

IIHow much heat (in kJ) _ required to raise the temperature of 3.5 kg of water from 25 °C to 70 °C.?( ) 4.2; _ 660; ( ) 1000; ( ) 190; ( ) notgiven

12Dr. 1walks 1400 s at t.5 m/s while his dog "Fluffy" trots at 3.7 m/s for 10 minutes. ( ) Both travel the samedistance; ( ) Dr. I goes farther than Fluffy; O Fluffy goes farther than Dr. 1; ( ) need their starting times.

13Late at night in the Lloyd Noble parking lot, Dr. R drives his 1500-kg truck at 6.5 m/s in a 1S-m-radiuscircle. Find the truck's centripetal acceleration (in m/sZ).() 4.2; () 2.1; () 8.2; ( ) 0.42; _ not given

14What force (in N) is required to change the momentum of a golf ball by 15 kg- m/s in a time of 0.03 s?O 500; ( ) ]5; ( ) 350; ( ) 0.45; ( ) need its mass

15370 A of current flows in the starting motor of Prez Boren's truck on a cold day. How much charge(in kO passes through the starting motor in lO minutes?() 37; () 0.62; () 3.7; _) 220; ( ) not given16

Find the mass (in kg) of an asteroid that accelerates at 0.0068 m/s z around the sun, which exerts a

gravitationai force of 2_6.10 Ix N on it.

( ) 1.8.10-14; ( ) 6.8-1014; __ 3.8-1014; ( ) 1.8.1010; ( ) notgiven

l 7If 3.6 kg of gaseous Ryanite, at its boiling point of 78 °C, liquefies when 3200 kJ of heat is removedfrom it, find L, the latent heat of vaporization (in kJ/kg).

890; v ( ) 680; ( ) 330; ( ) IJ; ( ) notgiven

After the Final, two students drop Dr. I off the top of the 50-m tall Clock Tower. How fast (in m/s) is hefalling just before he hits the ground?( ) 40; O 31; ( ) 3.2; ( ) 22; ( ) need his mass

19 -J("Anupward force of 1040 N is applied to a rope tied around 930-N Dr. l's neck lifting him off the ground.Find is his upward acceleration (in m/sZ).( ) l]; ( ) 1.6; ( ) 95; _) 1.2; ( ) notgiven

20Find the heaviest (in kN) truck that can be raised by a hydraulic Liftwith a 0.19-m-radius piston ffthe maximum pressure in the hydraulic cylinder is 380 kN/m _.() 230; () 3400; _) 43; ( ) 56; ( ) not given

@ •

: - 440989-.rmEnrolled Last Name"lnthe: DoNOTposI. . : -.:

' _nygmdesl "-

C) "g:3o Signature • g_vennorfeceivedhelponthisexam. • (_/_ "" O 10:30 " " "

Section. StudentIDNumber I ""

Exam 2 .... Physics ] ] 14 Fall 2007UsePencil,NOT PEN;EraseIncorrectanswe_completely.Markan answerby fillingin the spacebetweenthe bracketscompletely,e.g..(e)DO NOT CIRCLEANSWER!If A isyour answer,thenmark thenumberwithin 10%of A; that is: if oneof the multiplechoiceslisted is'_greaterthanA/I.I and lessthan 1.I.A', then that choiceis correct;othe=_visemark "{e) NotGiven'.

Note: f- = 10"1s; p- = 10"12; n- = 10"9; Ia- = 10"6; m- = 10"3; k- = 103; M- = 106; G- = 109;'T - = 10 i2

A skier (on frictioniess skies) starts from rest atop a 48-m-high ski jump. ttow fast (in m/s) is shetraveling at the bottom of the jump?(_ 31; ( ) 48; ( ) 62; " ( ) 22; ( ) needhermass

2Find the NET work (in kJ) required to stop a 2700-kg raging buU initially traveling 13 m/s.() 460; () 35; C) 230; () 0.0; () not given

3How much does electricity cost (in t/kWh) if you spend $3.50 to operate a 2.7 kW oven for 18 h?( } 19; C) 7.2: ( ) 9.4; { ) 4.9; ( ) notgiven

4Find the force (in lb) exerted by the earth's atmosph_e o:t the 12 inch by tSdri_*fi top of a sealed box.( ) 4500: ) 220; ( ) 15: ( ) 2300; C_ not i,,iven

5• the following is an appropriate unit for power?

,/ (ton.mile)/h; ( ) (N.s)/rn; " ( ) (lb.s)/ft; ( ) (kg.m)/s; O J "s6t:h_d tim work (in kJ) required to load a IS00-N box on 1.6-m-high truck using a 6-m-long ramp?( ) 1.9; ( ) 400; ( ) 24; (_ 2.4: ( ) nol given

7

SCUBA diving in a lake, how deep (in m) are you below the stu'face ff your pressure gauge reads 65 kN/m2?C) 6.6; ( ) 5.0; ( ) 65; ( ) 9.5; ( ) not given

__ - -- - ..... _ - .--

8How much work (in MJ) can a 2.7 horsepower (hp) motor do in 23 minutes?( ) 46; ( ) 2.0; C) 2.8; () 1.5; (.) not given

9

Which of the following set of characteristics describes a liquid: {(D-compressible; O-not easily compressed;®-rigid; O-flows readily; O-strong forces between atoms; _)-very weak forces beP,veen atoms; O-arumsclose togelher; ®-atoms far apart; (_)-atoms only vibrate; _-atoms readily move about}( ) 0,®,®,®; ( ) ®,0,®,®: 0 0,®,®,@; ( ) O,0,®,0; ( ) ®,®,®,0

1olnitiaUy at rest atop the Clock Tower with 42 kJ of potential energy, Dr. l slides down its brick side. If 18 kJof work is done BY Dr. I, find the kinetic energy (in kJ) with which he hits the ground (where PE = 0).( ) 18; O 24; ( ) 60; ( ) 42; ( ) not given

O

Find the mass !in kg) of a flying.saucer traveling 44 .]__c._2im;_a.g omfinri_. ,_l_I_0_s. • . • .( ) 7.5; . . . - a 3.2; ' -' " ( ) 0.31 _, ""'" _'. (3 2:4; .... ";"a ( ) not given- ..

12

Find the pressure (in kN/m 2) required to lift a 1700-kg car using a hydraulic lift with a 0.2-m-radius piston.( ) 14; ........ ( ) 270; () !8; ..... ID •130; " • () notgi_zen "

13

Find the kinetic energy (in pJ) of a 2.3.10 .4 kg snowflake falling with a velocity of 0.45 m/s. .....( ) 47; ( ) .0.0; 0 23; () 100; ( ) not given

14

Find the pressure (in kN/m 2) a 65-kg ballerina exerts on the floor when she stands on the 7.104 m 2 tip' of one toe-sh0e. " '

() 190; () 34; () 640; () 93; _[b not given

15Which of the following has the largest mass?

O 0.3 m 3 of copper; " ( ) 0.1 m 3 of gold; 1 m 3 of concrete; ( ) 2 m 3 of ice

16

Using the graph of gauge pressure vs. depth in Fig. A, select the answer thai: most accurately representsthe increase in pressttre (in kN/m 2) as you go from a depth of 3.5 m to a depth,of 9.0 below the surface.! ) 0.75; ( ) 130; ( ) 11; Q 76; ( ) 51

17

.... •_¢ change m the momentum (in kg. m/s) of a 0.17-kg ball when it is hit by a bat that applies anin,pulse of 6.5 N. s to the ball in a time of 0.3 s.( ) 2.0; ( ) 17; ( ) 38; ( ) 22; _ not given18

A 1.7-kg gun shoots a 6.5-gram hitllet at 340 m/s. Find the final momentum (in kg.m/s) of the gn.m.( ) 1.3: ( ) 5_,0; _ '_'_-_._, ( ) 2.9; ( ) nol given

19

Find the volume (in m 3) of the Great Pyramid if its mass is 7.10 s kg and density is 2700 kg/m 3.

( ) 1"9"1012; _ 2"6"105; ( ) 3.9"10"6; _ (__)1_._9:105-;-- ( ) notgiven

20 " J "Find the work (in kJ) done by a student who drags 85-kg Dr. R 1.6-kin "_ong a sidewalk using a 320-N force.

( ) 830; () 200; _ 1300;" _ 510; () not given "

Fig. A Gauge Pressure vs. Depth

Q.

0

0 1 2 3 4 5 6 7 8 9 10Dep'_h{m)

i° ° "°

J103 441518i'm Enrolled Last Namein the: Do NOT post

O 9:30 Signature mygradesl0 10:30 givennorreceivedhelpon thisexam. 0

Exam 3 Physics 11 "14 Fall 2007Use Pencil, NOT PEN. Erase Incorrect answer completely. Mark an answer by filling in the space between the brackets completely, e.g. (_)DO NOT CIRCLE ANSWER! If A is your answer, then mark the number within 10%of A; that is: if one of the multiple choices listed is"greater than A/I.! and less than 1.1.A', then that choice is correct; otherwise mark "(O) Not Given".

Note: f- = 10qs; p- = 10q2; n- = 109; p- = 106; m- = 103; k- = 103; M- = 106; G- = 109; T- = 10 IzO

Iftherepulsiveforcebetween +1mCcha,ges. Snee Dapartis16 whatistheforee(inbetween the same two charges when they are a _fif'ance d = D/2 apart?

( ) 8.0; ( ) 18; J64; ( ) 4.0; 0 32¢/2-

Find the final temperature (in oC) after 35 kJ of heat is added to 6.5 kg of lead initially at 15 °C.( ) 130; O 56; ( ) !6; ( ) 82; ( ) not given

3

Find Lv, the latent heat of vaporization, (in kJ/kg) of Normanire if takes 850 kJ of heat to vaporize 1.8 kgof it afits boiling point of 120 °C.( ) 4.0; ( ) 850; ( ) 630; ( ) 360; _) not given4

Changing a light bulb while standing on a damp floor, Dr. I experiences a 120-V poteuri_ difference betweenbi_ b.;mds a:_.d.feet..rf his ._ot_':tre_:':st:_'mc i:; &'2.0:_, :,.-.'_l:.c e:-.'i_-k:nce: (), di:<_.a_i'ort; ( ) muscui,a"contraction; ( ) _fficulty breathktg; _ ventricul;¢ fibri!lation; or ( ) irreversible heart damage?5

A charge of +5-6 "10-1Z C ean be made up of: ( ) 250electrons; ( ) 225 protons and 225 electrons;570 protons and 220 electrons; ( ) 1.6.10 -19 proton,,;: ( ) none of these

6Find the attractive force (in pN) between an electron and a +5 pC charge that are 6.5 mm apart.( ) 130; ( ) 370; O 170; ( ) 1.1; ( ) not given

7Which of the following is the largest 220-V heater Crated in Watts) that will operate on a 15-A fuse?C) 2500W; ( ) 220W; ( ) 1500W; ( ) 4000W; ( ) 15,000W

8

Find AU, the change in the internal energy, (in kJ) of an ideal gas if the work done by the gas is 3.5 kJ'" while 2.6 kJ of heat is added to the gas.( ) -3,5; ( ) +7.1; ( ) +2.6; (_ -0.90; ( ) not given

9An iron bridge is 750 m long at -10 °C. How much longm" (in m) is it at 30 °C?( ) 12; ( ) 0.26; ( ) 0.53; ( ) 0.18; (_3 not given

10

Find the power (in W) dissipated by a 160-ff2 resistor when the voltage across it is 120 V.() 210; ¢_ 90; () 0.75; () 19,000; () not given

4415J" Last___ .

"{_ Howl1long (in h) can you__'_runa 350-W st__e _s__ _( ) 29; ) 22; ( ) 2.8; " _ '82; ) not given

12Find the Fahrenheit temperature that corresponds to -26 °C.

-15; ) -47; ( ) +11; ( ) -32; ) not given

13A battery stores 650 kJ of (potential) energy and can sdpply 145 kC. What is the battery's Voltage (in V)?() 0.22; 32; _t 4.5; () 6.0; ) not given

14Find tb.e heat (in kJ) required to raise 5.6 kg of water from 10 °C to 70 °C.() 670; ) 1900; ( ) 390; • 1400; ) not given

15Which of the following takes the smallest amount of heat to raise 3.2 kg of it from 25 °C to 55 °C?

lead; ) iron; () coplpe_:; () mercury; ) water

16"f How much charge (in kC) is stored in a 6-V battery that ::'.in supply a 05"50 A current for h?

( ) 4.5; ) 72; _) 24; () 41; ) not given

1.7How much heat (in kJ) must be added to 1.8 kg of ice at 0 °C to produce !.8 kg of _ater at 95 °C?( ) 1600; ) 730; ( ) 600; _t 1300; ) not given

Fio(l l he ct__rrent (in rt_k) Lhrougb R1 --_-2.9 kC.,m Fig. i_if V0 is 24 V.() [20; (_ 8.3; ( ) 200; ) 6.3; ) not given

Using the graph of voltage (in V) vs. current (h_mA) in a resistor R given in Fig. A, select the answer thatmost accurately represents the power (in mW) dissipate0, tu R when the voltage across it is 15 V.( ) 100; ( ) 75; ( ) 170; _ ]30; ( ) 0.83

2OWhen two electrons come near each other they always: ( ) attract eavh other; ( ) form an ion;

repel each other; ( ) form a molecule; ( ) become a nucleus; none of these is always true

O

Fig.AVoltage (in V)vs Current(in mA) I. R

_'20,_ //-

6 lO / '

,00 0.2 0.4 0.6 0.8 1. 1.2 1.4 1.6 -

Current (mA)

_____p le--_'_Sit-T6-S_t'_"_

D103 | 4419J8rmEnroUedLast Name " First Namein the: Do NOT post

C) 9:30 Signature mygradesl(_ 10:3 0 I e neither given norreceived help on this exam. C)

Make-Up Exam Physics 1114 Fall 2007Use Pencil, NOT PEN. Erase Incorrect answer completely. Mark an answer by filling in the space between the brackets completely, e.g. (e)DO NOT CIRCLE ANSWER! If A is your answer, then mark the number within 10% of A; that is: if one of the multiple choices listed is"greater than A/1.) and less than 1.1.A". then that choice is correct; otherwise mark "(O) Not Given".

Note: f- = ]0Is; p- = t0|z; n- = ]09; p- = ].06; m- = ]03; k- = 103; M- = ]06; G- = 109; T- = 10 T] *"

Water Data: D = 1000 kg/m3; D = 62.4 ]b/ft3; C = 4.]84 kJ/(kg, oC); Lf = 334 kJ/kg; I_ = 2260 kJ/kgt mg •

]Initially at rest atop the dock Tower with 35 kJ of potential energy, Dr. ! slides down its brick side. If 26 kJof work is done BYDr. [, find the kinetic energy (in kJ) with which he hits the grotmd (where PE= 0).(_) 9.0; () 35; () 61; () 26; () not given

2

Find the increase in pressure (in kN/m2).as you dive 24 in below the surface of Lake Dirtybird.() 70; ( ) 340; C) 240; () 35; () not given

3

Find the volume (in m 3) of a pyramid ff its mass is 3- 108 kg and density is 2500 kg/m 3.

, ( ) 7.5.10]]; O 1.2-105; ( ) 9.2-104; ( ) 1.6. 105; ( ) not given

4

Find ihe fina_ temperature (in _C) after 300 RJ of heat is added to 2.4 kg or' water Loitiany at 15 °C.( ) 55; ( ) 70; ( ) 30; O 45; ( ) notgiven

5

Find the acceleration (in km/s 2) of a 560-kg rocket ff the net force on it is 2.1 MN.(_ 3.8; () 1.2; ( ) 270; () 5.6; ( ) notgiven

• _ 6

How much charge (in kC) is stored in a 6-V battery that can supply 750 kJ of (potential) energy?( ) 23; ( ) 4.5; ( ) 310; ( ) 95; _) not given

Find the NET work (in kd to stop a 750-kg running deer initially traveling 34 m/£( ) 860; ._430; ( ) 26; ( ) 320; I_ not given

Find the gravitational forte (in N) on a 5.10 z kg asteroid, which is 32 Gm from the 2- 103° kg sun.

() 1"9"107;' () 7.1"105; _) 6.5"11)6; () 2.1"108; () not given

9

Find the resistance (in f2) of a hot dog that dissipates 75 watts when the voltage across it is 48 V._ 31; ( ) 24; ( ) 56; ( ) 1.6; ( ) not given

10Find the velodi_ (in nine/s) of a snail that travels 23 cm in 2 minutes.( ) 0.77; ( ) 9.1; ( ) 1.3; ( ) 12; O not given

* Last Nam_ ...... " ,D 44194811 'How much heat (in kJ) must be added to 0.75 kg_:'_u -_er at 45 °C?( ) 140; ( ) 960; _ 390; ( ) 250; ( ) not given

-12Find the force (in kN) on a 0.15-m by 0.2-m window in the space shuttle when it is in orbit if the pressureinside the shuttle is 0.8 alan.( ) 4.6; ( ) 3.0; ( ) 35; O 2.4; ( ) not given

13

Find the heaviest truck (in kN) that can be raised by a hydraulic lift with a 0.35-m-radius piston ff thedraulic pressure is 87 kN/m 2.33; ( ) 24; ( ) 11; ( ) 68; ( ) not given

- 14

After Exam I, two students tie a rope to 75-kg Dr. I and spin him around,in a_circle at a speed of 7 m/s.Find the radius of the circle (in m) if the centripetal force on Dr. 1 is 1_00 N.( ) 15; ( ) 2.3; ( ) 11; _¢_7) 3.3; _ not given

15 _Using an 1040-N force, Prez Boren pulls Dr. I who weighs 960-N, up to the top of the Clock Tower.Find Dr. I's acceleration (in m/s2).( ) 0.63; O 0.82; ) 1.2; ( ) 11; ( ) not given

16How much charge (in C) is stored in a 12-V battery that can supply a 150 mA current for 3 h?Q 1600; ( ) 1.8; ( ) 450; ( ) 2100; ( ) not given

17 j96-kg Dr. I sits on a ladder to change a light bulb. Find the weight (in N) of the ladder if the floor, exerts

a 1.7-kN (normal) force on the ladder. "4a_-J'_'no( ) 620; a[} 940; ( ) 2600; ( ) 460; t given18

Find Lf, the latent heat of fusion, (in kJ/kg) of Ryanite if takes 3800 kJ of heat to melt 2.7 kg of it at itsmelting point of 45 °C.( ) 31; _ 1400; ( ) 560; () 330; ( ) not given

19

Find the work (in k J) required to load a 1900-N box on 1.7-m-high truck using an 8-m-long ramp?( ) 400; ( ) 31; ( ) 1.1; Q 3.2; ( ) not given20

Dr. R throws a ball directly upward with a velocity of'+3 m/s. Find its position (in m) 0.9 s after it leaveshis hand. [His hand is the zero of position.] .J

() :.0; . +2.7; J-l.3; () -5.8; () notgiven.