monday 10 may 2010 (afternoon) instructions to … · which of the following correctly shows the...

2210-6510 12 pages

M10/4/PHYSI/SPM/ENG/TZ1/XX+

Monday 10 May 2010 (afternoon)

Physicsstandard levelPaPer 1

INSTRUCTIONS TO CANDIDATES

• Do not open this examination paper until instructed to do so.• Answer all the questions.• For each question, choose the answer you consider to be the best and indicate your choice

on the answer sheet provided.

45 minutes

© International Baccalaureate Organization 2010

2 2 1 0 6 5 1 0

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1. Thebestestimateforthetimeittakeslighttocrossthenucleusofthehydrogenatomis

A. 10 23− s .

B. 10 20− s.

C. 10 15− s .

D. 10 7− s.

2. The length of each side of a sugar cube is measured as 10mmwith an uncertainty of ± 2mm.Whichofthefollowingistheabsoluteuncertaintyinthevolumeofthesugarcube?

A. ± 6mm3

B. ± 8mm3

C. ± 400mm3

D. ± 600mm3

3. Thetimetakenforastonedroppedfromresttofallverticallythrough16mis2.0s.Basedonthesemeasurements,whatisthebestestimatefortheaccelerationoffreefall?

A. 4 0 2. ms−

B. 8 0 2. ms−

C. 9 8 2. ms−

D. 10 2ms−

4. Awoodenblockisslidingdownaninclinedplaneatconstantspeed.Themagnitudeofthefrictionalforcebetweentheblockandtheplaneisequalto

A. zero.

B. themagnitudeoftheweightoftheblock.

C. themagnitudeofthecomponentofweightoftheblockparalleltotheplane.

D. themagnitudeofthecomponentofthenormalreactionparalleltotheplane.

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5. WhichofthefollowingisacorrectstatementofNewton’ssecondlawofmotion?

A. Aforceactingonabodyisproportionaltothemassofthebody.

B. The rate of change of momentum of a body is equal to the net external force acting onthebody.

C. Themomentumofabodyisproportionaltothenetexternalforceactingonthebody.

D. Aforceactingonabodyisproportionaltotheaccelerationofthebody.

6. AballofweightWistravellinghorizontallytowardsaverticalwall.Itstrikesthewallandreboundshorizontally.Thechangeinthemagnitudeofthemomentumoftheballis∆p .Whichofthefollowingisthemagnitudeoftheimpulsethattheballimpartstothewall?

ball

W

A. W p+ ∆

B. W p− ∆

C. W

D. ∆p

7. Twoobjectsundergoaninelasticcollision.Whichofthefollowingiscorrectinrespectofboththeconservationofmomentumandtheconservationoftotalenergyofthesystem?

Momentum Total energy

A. conserved notconserved

B. conserved conserved

C. notconserved notconserved

D. notconserved conserved

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8. AparticlePismovinganti-clockwisewithconstantspeedinahorizontalcircle.

Whichdiagramcorrectlyshowsthedirectionofthevelocityv andaccelerationa oftheparticlePinthepositionshown?

A.

P

a

v

B.

P

a

v

C.

P

a

v D.

P

a and v

9. Two objects are in thermal contactwith each other. Which of the followingwill determine thedirectionofthetransferofthermalenergybetweenthebodies?

A. Themassofeachbody

B. Theareaofcontactbetweenthebodies

C. Thespecificheatcapacityofeachbody

D. Thetemperatureofeachbody

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10. Themoleisdefinedas

A. 112 themassofanatomoftheisotopecarbon-12.

B. theamountofasubstancethatcontainsasmanyelementaryentitiesasthenumberofatomsin12goftheisotopecarbon-12.

C. themassofoneatomoftheisotopecarbon-12.

D. theamountofasubstancethatcontainsasmanynucleiasthenumberofnucleiin12goftheisotopecarbon-12.

11. Agasiscontainedinacylinderbyapiston.

Thegasiscompressedrapidlybymovingthepistoninthedirectionshown.Thebestexplanationfortheresultingincreaseintemperatureofthegasisthatthemoleculesofthegasgainkineticenergy

A. fromthemovingpiston.

B. bycollidingmorefrequentlywitheachother.

C. bybeingpushedclosertogether.

D. bycollidingmorefrequentlywiththewallsofthecylinder.

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12. Thegraphshowshowthevelocityv ofanobjectundergoingsimpleharmonicmotionvarieswithtimet foronecompleteperiodofoscillation.

t

v

00

WhichofthefollowingsketchgraphsbestshowshowthetotalenergyE oftheobjectvarieswitht ?

A.

t

E

00

B.

t

E

00

C.

00

E

t

D.

t

E

00

13. Aforcethatvariessinusoidallyisappliedtoasystemthatislightlydamped.Whichofthefollowingmustbetrueoftheforceforresonancetooccur?

A. Itmustalwaysbeinanti-phasewiththeoscillationsofthesystem.

B. Itsdirectionmustalwaysbeinthedirectionofmotionoftheoscillationsofthesystem.

C. Itsfrequencymustbeequaltothefrequencyofoscillationofthesystem.

D. Itsamplitudemustbeequaltotheamplitudeofoscillationofthesystem.

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14. Which of the following is a value of wavelength that is found in the visible region of theelectromagneticspectrum?

A. 4 10 5× − m

B. 4 10 7× − m

C. 4 10 9× − m

D. 4 10 11× − m

15. Twowavesmeetatapointinspace.Whichofthefollowingpropertiesalwaysaddtogether?

A. Displacement

B. Amplitude

C. Speed

D. Frequency

16. Apointchargeofmagnitude2.0µCismovedbetweentwopointsXandY.PointXisatapotentialof + 6.0V and point Y is at a potential of + 9.0V. The gain in potential energy of the pointchargeis

A. 0.20µJ.

B. 1.5µJ.

C. 6.0µJ.

D. 30µJ.

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17. Aresistorofresistance12Ω isconnectedinserieswithacellofnegligibleinternalresistance.ThepowerdissipatedintheresistorisP.Theresistorisreplacedwitharesistorofresistance3.0Ω.Whatisthepowerdissipatedinthisresistor?

A. 0.25P

B. P

C. 2.0P

D. 4.0P

18. Theelectromotiveforce(emf)ofacellisdefinedas

A. thepowersuppliedbythecellperunitcurrentfromthecell.

B. theforcethatthecellprovidestodriveelectronsroundacircuit.

C. theenergysuppliedbythecellperunitcurrentfromthecell.

D. thepotentialdifferenceacrosstheterminalsofthecell.

19. Theweightofanobjectofmass1kgatthesurfaceofMarsisabout4N.TheradiusofMarsisabouthalftheradiusofEarth.Whichofthefollowingisthebestestimateoftheratiobelow?

massof Marsmassof Earth

A. 0.1

B. 0.2

C. 5

D. 10

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20. ThreepositivepointchargesofequalmagnitudeareheldatthecornersX,YandZofaright-angledtriangle.ThepointPisatthemidpointofXY.WhichofthearrowsshowsthedirectionoftheelectricfieldatpointP?

X

A B

CD

P

YZ

21. AnelectrontravellinginthedirectionshownbythearrowX,entersaregionofuniformmagneticfield.ItleavestheregionoffieldinthedirectionshownbythearrowY.

Region of magnetic field

X

Y

Thedirectionofthemagneticfieldis

A. inthedirectionofX.

B. intotheplaneofthepaper.

C. intheoppositedirectiontoX.

D. outoftheplaneofthepaper.

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22. Emissionandabsorptionspectraprovideevidencefor

A. thenuclearmodeloftheatom.

B. naturalradioactivity.

C. theexistenceofisotopes.

D. theexistenceofatomicenergylevels.

23. WhichofthefollowingistrueinrespectofboththeCoulombinteractionandthestronginteractionbetweennucleonsinanatom?

Coulomb interaction exists between

Strong interaction exists between

A. protonsonly neutronsonly

B. bothprotonsandneutrons neutronsonly

C. protonsonly bothprotonsandneutrons

D. bothprotonsandneutrons bothprotonsandneutrons

24. Whichofthefollowingcorrectlyidentifiesthethreeparticlesemittedinthedecayofthenucleus 20

45Caintoanucleusof 2145 Sc?

A.

B.

C.

D.

α β γ, ,−

β γ ν− , ,

α γ ν, ,

α β ν, ,−

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25. Thenuclearreaction

12 H + H He + n1

324

01→

isanexampleof

A. nuclearfission.

B. radioactivedecay.

C. nuclearfusion.

D. artificialtransmutation.

26. Degradedenergyisenergythatis

A. storedintheEarth’satmosphere.

B. availablefromnon-renewableenergysources.

C. convertedintoworkinacyclicalprocess.

D. nolongeravailablefortheperformanceofusefulwork.

27. Whichofthefollowingcorrectlydescribesboththeroleofthemoderatorandofthecontrolrodsinanuclearreactor?

Moderator Control rods

A. slowsdowntheneutrons maintainaconstantrateoffission

B. coolsdownthereactor extractthermalenergy

C. coolsdownthereactor maintainaconstantrateoffission

D. slowsdowntheneutrons extractthermalenergy

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28. Which of the following correctly shows the energy change in a photovoltaic cell and in asolarheatingpanel?

Photovoltaic cell Solar heating panel

A. solar→ electrical solar→ thermal

B. electrical→ thermal solar→ electrical

C. solar→ electrical electrical→ thermal

D. electrical→ thermal solar→ thermal

29. Thealbedofortheoceansislowerthanthatforglaciers.Thisisbecause,comparedtoice,seawater

A. hasagreaterdensity.

B. hasagreaterspecificheatcapacity.

C. hasagreatercoefficientofvolumeexpansion.

D. absorbsagreateramountofradiativepower.

30. Whichofthefollowingismostlikelytoreducetheenhancedgreenhouseeffect?

A. Replacetheuseofgaspoweredstationswithoilpoweredstations

B. Replacecoal-firedpowerstationswithnuclearpowerstations

C. Increasetheuseofallnon-renewableenergysources

D. Decreasetheefficiencyofpowerproduction

monday 10 may 2010 (afternoon) instructions to … · which of the following correctly shows the...

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