O Level

Only available on StudyMode
  • Topic: General Certificate of Secondary Education
  • Pages : 14 (1273 words )
  • Download(s) : 240
  • Published : March 25, 2013
Open Document
Text Preview
w

w
ap
eP

m

e
tr
.X

w

UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS

s
er
om
.c

GCE Ordinary Level

MARK SCHEME for the October/November 2008 question paper

5054 PHYSICS
5054/02

Paper 2 (Theory), maximum raw mark 75

This mark scheme is published as an aid to teachers and candidates, to indicate the requirements of the examination. It shows the basis on which Examiners were instructed to award marks. It does not indicate the details of the discussions that took place at an Examiners’ meeting before marking began. All Examiners are instructed that alternative correct answers and unexpected approaches in candidates’ scripts must be given marks that fairly reflect the relevant knowledge and skills demonstrated.

Mark schemes must be read in conjunction with the question papers and the report on the examination.



CIE will not enter into discussions or correspondence in connection with these mark schemes.

CIE is publishing the mark schemes for the October/November 2008 question papers for most IGCSE, GCE Advanced Level and Advanced Subsidiary Level syllabuses and some Ordinary Level syllabuses.

Page 2

Mark Scheme
GCE O LEVEL – October/November 2008

Syllabus
5054

Paper
2

Do not accept fractions. No penalty for [ 2 s. f. unless stated or for 1 s. f. where exactly correct. Only one unit and only one fraction penalty per question.
Section A
1

(a) 0.5(0) m

B1
C1
A1

(a) mgh or F × d or 10 × 700
(–)7000 J

C1
A1

(b) Q/E/H = mc∆T or (∆T =) 7000/(1) × 4200
1.7 or 1.67 or 5.5
8.9 °C e.c.f. (a)
4

B1

(b) rotates/tilts/unbalanced/one side down/one side up
rotates anticlockwise/down on left or head down or foot up
(net) anticlockwise moment or moment on left > moment on right or weight/CM on left of pivot
3

B1
B1
B1
B1

(b) 10(.0) N or e.c.f.
2

(a) diagram of two forces and resultant
W / 6(N) and T / 8(N) marked on perp. forces or scale given
10(.0 ±0.2) N
35–39° from T/Y/horizontal or 51–55° from W/vertical and correct resultant

C1
C1
A1

(a) (i) (a = ∆)v/t or 84/35
2.4 m/s²

C1
A1

(ii) speed and time axes correct and labelled
straight line of positive gradient through origin
84 (m/s) and 35 (s) marked
(b) (i) two arrows with forward force > backward force
(ii) air/wind resistance or friction or drag

© UCLES 2008

B1

[5]

[4]

[5]

B1
B1
B1
B1
B1

[7]

Page 3
5

Mark Scheme
GCE O LEVEL – October/November 2008

Syllabus
5054

(a) Any two pairs – may be expressed in terms of the gas:
liquid
M1 molecules
dense(r)
close(r)/touching
incompressible/volume fixed
close(r) or strong(er) forces
fills bottom container
forces strong(er)
expands less when heated
forces strong(er)
more viscous/flows slower
forces strong(er)
sound fast(er)
close(r) or strong(er) forces
better conductors of heat
close(r)
slower diffusion
close(r)

Paper
2
A1

(b) molecules gain speed/energy/heat and escape/leave cloth/break bonds or latent heat needed
fast(er)/high(er) (kinetic) energy molecules escape/evaporate (average) speed / (kinetic) energy (of remainder) decreases
or temperature related to (average) energy/speed of molecules 6

M2
A2

B1
B1
B1

(a) red

B1

(b) (i) equal to

B1

(ii) less than

B1

(c) two correct refractions on Fig. 6.2
no dispersion and ray ends close to P
(a) 12(.0) V

B1
B1
B1
B1

(c) (E=) QV or VIt or 200 × 12
2400 J accept 2370–2410 J e.c.f.
8

M1
A1

(b) top row: 4.6 and 0
bottom row: square 1 = square 2 + square 3 or 9.2
bottom row: 4.6 in squares 2 and 3 cao

7

[7]

C1
A1

(a) fusion

B1

(b) (i) mass decreases or product/nuclei/atoms less massive
mass becomes/converted to energy

B1
B1

(ii) E = mc2
6.6 × 10–29 × (3.0 × 108)2
5.9 × 10–12 or 5.94 × 10–12 J

B1
C1
A1

© UCLES 2008

[5]

[6]

[6]

Page 4

Mark Scheme
GCE O LEVEL – October/November 2008

Syllabus
5054...
tracking img