# Physics: Energy and Nuclear Power Station

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M11/4/PHYSI/SPM/ENG/TZ1/XX

22116510

Physics
standard level
PaPer 1
Wednesday 11 May 2011 (afternoon)
45 minutes
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

2211-6510

14 pages

2
1.

M11/4/PHYSI/SPM/ENG/TZ1/XX

Whichofthefollowingcontainsonefundamentalandonederivedunit? A.

ampere

kilogram

B.

ampere

coulomb

C.

joule

newton

D.

joule

coulomb

2.

A.

1%.

B.

2%.

C.

5%.

D.

20%.

3.

A.

0N.

B.

80N.

C.

800N.

D.

4000N.

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4.

M11/4/PHYSI/SPM/ENG/TZ1/XX

Josephrunsalongalongstraighttrack.Thevariationofhisspeedvwithtimetisshownbelow. 12
10
8
v / ms–1

6
4
2
0

0

5

10

15
t /s

20

25

30

After25secondsJosephhasrun200m.Whichofthefollowingiscorrectat25seconds? Instantaneous speed / m s–1

Average speed / m s–1

A.

8ms–1

8ms–1

B.

8ms–1

10ms–1

C.

10ms–1

8ms–1

D.

10ms–1

10ms–1

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4
5.

M11/4/PHYSI/SPM/ENG/TZ1/XX

Acarofmass1000kgacceleratesonastraight,flat,horizontalroadwithanaccelerationa = 0.3 m s −2 . ThedrivingforceFonthecarisopposedbyaresistiveforceof500N. .
a = 0.3 m s −2

F

500N

Thenet(resultant)forceonthecaris

A.

200N.

B.

300N.

C.

500N.

D.

800N.

6.

Atennisballofmassmmovinghorizontallywithspeedustrikesaverticaltennisracket.Theball bouncesbackwithahorizontalspeedv.
u

m
v

Themagnitudeofthechangeinmomentumoftheballis

A.

m (u + v).

B.

m (u – v).

C.

m (v – u).

D.

zero.

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7.

M11/4/PHYSI/SPM/ENG/TZ1/XX

A brother and sister take the same time to run up a set of steps. The sister has a greater mass than her brother. Whichofthefollowingiscorrect?
Has done the most work
A.

Has developed the greatest power

brother

brother

brother

sister

B.
C.

sister

D.

sister

brother

sister

8.

Anuclearpowerstationproduces10GWofelectricalpower.Thepowergeneratedbythenuclear reactionsinthecoreofthereactoris25GW.Theefficiencyofthepowerstationis

A.

15%.

B.

35%.

C.

40%.

D.

60%.

9.

Acyclistridesaroundacirculartrackatauniformspeed.Whichofthefollowingcorrectlygives the net horizontalforceonthecyclistatanygiveninstantoftime? Net horizontalforce along

direction of motion

Net horizontalforce normal to
direction of motion

A.

zero

zero

B.

zero

nonzero

C.

nonzero

zero

D.

nonzero

nonzero

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6

M11/4/PHYSI/SPM/ENG/TZ1/XX

10. Asolidpieceoftungstenmeltsintoliquidwithoutachangeintemperature.Whichofthefollowing iscorrectforthemoleculesintheliquidphasecomparedwiththemoleculesinthesolidphase? Kinetic energy

Potential energy

A.

same

greater

B.

same

same

C.

greater...