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UNIVERSITY OF CAMBRIDGE INTERNATIONAL EXAMINATIONS General Certificate of Education Advanced Level

*0938524315*

PHYSICS Paper 4 A2 Structured Questions Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Centre number, candidate number and name on all the work you hand in. Write in dark blue or black pen. You may use a softpencil for any diagrams, graphs or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. DO NOT WRITE IN ANY BARCODES.

9702/41
October/November 2009 1 hour 45 minutes

For Examiner’s Use Answer all questions. You may lose marks if you do not show your working or if you do not use appropriate units. At the end of the examination, fasten all your worksecurely together. The number of marks is given in brackets [ ] at the end of each question or part question. 1 2 3 4 5 6 7 8 9 10 11 12 Total

This document consists of 21 printed pages and 3 blank pages.
DC (NF/CGW) 12642/7 © UCLES 2009

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2 Data speed of light in free space, permeability of free space, permittivity of free space, elementary charge, the Planckconstant, unified atomic mass constant, rest mass of electron, rest mass of proton, molar gas constant, the Avogadro constant, the Boltzmann constant, gravitational constant, acceleration of free fall, c = 3.00 × 10 8 m s –1

μ0 = 4π × 10 –7 H m–1
ε0 = 8.85 × 10 –12 F m–1
e = 1.60 × 10 –19 C h = 6.63 × 10 –34 J s u = 1.66 × 10 –27 kg me = 9.11 × 10 –31 kg mp = 1.67 × 10 –27 kg R = 8.31 J K –1mol –1 NA = 6.02 × 10 23 mol –1 k = 1.38 × 10 –23 J K –1 G = 6.67 × 10 –11 N m 2 kg –2 g = 9.81 m s –2

© UCLES 2009

9702/41/O/N/09

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3 Formulae uniformly accelerated motion, s = ut +
1 2 2 at

v 2 = u 2 + 2as work done on/by a gas, gravitational potential, hydrostatic pressure, pressure of an ideal gas, simple harmonic motion, velocity of particle in s.h.m., W =pV

φ = – Gm
r p = ρgh p =
1 3

Nm 2 V

a = – ω 2x v = v0 cos ωt v = ± ω √⎯(x⎯ 02 – x 2) ⎯ ⎯ ⎯ ⎯ V = Q 4πε0r

electric potential, capacitors in series, capacitors in parallel, energy of charged capacitor, resistors in series, resistors in parallel, alternating current/voltage, radioactive decay, decay constant,

1/C = 1/C1 + 1/C2 + . . . C = C1 + C2 + . . . W =
1 2 QV

R = R1 + R2+ . . . 1/R = 1/R1 + 1/R2 + . . .

x = x0 sin ωt x = x0 exp(– λt )

λ =

0.693 t1
2

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9702/41/O/N/09

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4 Section A Answer all the questions in the spaces provided. 1 (a) State Newton’s law of gravitation........................................................................................................................................... .......................................................................................................................................... .................................................................................................................................... [2] (b) The Earth may be considered to be a uniform sphere of radius R equal to 6.4 × 106 m. A satellite is in ageostationary orbit. (i) Describe what is meant by a geostationary orbit. .................................................................................................................................. .................................................................................................................................................................................................................................................................... ............................................................................................................................ [3] (ii) Show that the radius x of the geostationary orbit is given by the expression gR 2 = x 3ω 2 where g is the acceleration of free fall at the Earth’s surface and ω is the angular speed of the satellite about...
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