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UNIVERSITY OF CAMBRIDGE
INTERNATIONAL EXAMINATIONS
International General
Certificate of Secondary Education
Physics 2007
1
The mechanical stop-clock
shown in Fig. 1.1 has a seconds hand, which rotates once every
minuteand a minutes hand, which rotatesonce every hour. 60 5
10 15 20 25 30 35 40 45 50 55 start reset stop minutes hand
seconds hand Fig.
1.1
(a)
A student uses the clock to
time the intervals between trains travelling along the railway
past his school. He sets the clock to zero (both hands
vertical). As train 1 passes, he starts the clock and leaves
it running. After 35 s, train 2 passes. On the blank face of
Fig. 1.2, show the positions of the two hands of the clock as
train 2 passes. Make sure it is clear which hand is which. [2]
60 5 10 15 20 25 30 35 40 45 50 55
Fig. 1.2 3
0625/02/M/J/07
[Turn over
(b)
Train 3 passes the school 4
minutes and 55 s after the clock was started. On the blank
face of Fig. 1.3, show the positions of the hands of the clock
as train 3 passes. [2] 60 5 10 15 20 25 30 35 40 45 50
55 Fig. 1.3
(c)
Calculate the time interval
between train 2 and train 3. time interval = ...............
min ............... s [1] [Total: 5]
2
In a training session, a
racing cyclist’s journey is in three stages. Stage 1 He
accelerates uniformly from rest to 12 m/s in 20 s. Stage 2 He
cycles at 12 m/s for a distance of 4800 m. Stage 3 He
decelerates uniformly to rest. The whole journey takes 500 s.
(a) Calculate the
time taken for stage 2. time = ............... s [2]
(b) On the grid of
Fig. 2.1, draw a speed/time graph of the cyclist’s ride. [3]
14 12 10 8 6 4 2 0 0 100 200 300 400 500 speed / m / s time /
s Fig. 2.1
(c)
Show that the total distance
travelled by the c clist is 5400 m. [4]
(d) Calculate the
average speed of the cyclist. average speed = ...............
m/s [2] [Total: 11]
3
A piece of stiff cardboard is
stuck to a plank of wood by means of two sticky-tape “hinges”.
This is shown in Fig. 3.1. stiff cardboard sticky-tape “hinge”
plank of wood A B C
Fig. 3.1
(a)
The cardboard is lifted as
shown, using a force applied either at A or B or C.
(i)
On Fig. 3.1, draw the force
in the position where its value will be as small as possible.
[2]
(ii)
Explain why the position you
have chosen in (a)(i) results in the smallest force.
[1]
(b)
Initially, the cardboard is
flat on the plank of wood. A box of matches is placed on it.
The cardboard is then slowly raised at the left hand edge, as
shown in Fig. 3.2. stiff cardboard sticky-tape “hinge” plank
of wood Fig. 3.2
State the condition for the box of matches to fall over.
[2]
(c)
The box of matches is opened,
as shown in Fig. 3.3. The procedure in (b) is repeated.
stiff cardboard sticky-tape “hinge” plank of wood
Fig. 3.3 (i)
Complete the sentence below, using either the words “greater
than” or “the same as” or “less than”. In Fig. 3.3, the angle
through which the cardboard can be lifted before the box of
matches falls is …………………………………………… the angle before the box of
matches falls in Fig. 3.2. [1]
(ii) Give a reason
for your answer to (c)(i). [1]
[Total: 7]
4
In Fig. 4.1, a small bird, a
large bird and a squirrel are on the ground under a tree.
Fig. 4.1
A loud noise scares the two
birds. They both fly up to the top of the tree.
(a) (i) Which bird
does the most work raising itself to the top of the tree?
................... [1]
(ii) Explain your
answer to (a)(i). [1]
(b)
A squirrel has the same
weight as the large bird. It climbs the tree, to the same
height as the birds. How does the increase in the squirrel’s
gravitational potential energy compare with that of each of
the two birds? Answer the question by completing the sentences
below. Compared with that of the small bird, the increase of
the squirrel’s potential energy is
.................................................................
. Compared with that of the large bird, the increase of the
squirrel’s potential energy is
.................................................................
. [2]
(c)
Which creature has the least
gravitational potential energy when they are at the top of the
tree?
...................................................................................................................................
[1] (d)
The small bird flies back
down to the ground. What happens to the gravitational
potential energy it had at the top of the tree?
...................................................................................................................................
[2]
5 (a)
Here is a list of
descriptions of molecules in matter.
description solid gas
free to move around from place to place can only vibrate about
a fixed position closely packed relatively far apart almost no
force between molecules strong forces are involved between
molecules In the columns alongside the descriptions, put ticks
next to those which apply to the molecules in
(i) a solid,
(ii)
a gas. [4]
(b)
The water in a puddle of
rainwater is evaporating. Describe what happens to the
molecules when the water evaporates. [2]
[Total: 6]
10
6 (a)
Fig. 6.1 shows how the
pressure of the gas sealed in a container varies during a
period of time. pressure time
Fig. 6.1
Which of the following
statements could explain this variation of pressure? Tick two statements. The temperature of the gas is increasing. The temperature of the gas is
decreasing. The volume of the container
is increasing. The volume of the container
is decreasing. [2]
(b)
Fig. 6.2 shows some gas
trapped in a cylinder with a movable piston. cylinder piston gas
Fig. 6.2
The temperature of the gas is raised.
(i)
State what must happen to the
piston, if anything, in order to keep the pressure of the gas constant. [1]
(ii)
State your reasons for your
answer to (b)(i).[1]
[Total: 4]
7
An electric soldering iron is
used to melt solder, for joining wires in an electric circuit.
A soldering iron is shown in
Fig. 7.1. copper tip metal cylinder with heater coil inside plastic handle lead to electricity supply
Fig. 7.1
Solder is a metal which melts
easily. The heater coil inside the metal cylinder heats the copper tip.
(a) (i)
Suggest why the tip is made
of copper.[1]
(ii)
Suggest why the handle is
made of plastic. [1]
(b)
The heater coil is switched
on. When the tip is put in contact with the solder, some of
the heat is used to melt the
solder.
(i)
State the process by which
the heat is transferred from the copper tip to the solder.
[1]
(ii)
By which process or processes
is the rest of the heat transferred to the surroundings? Tick the boxes alongside any
of the following (you may tick as many as you think are correct). conduction convection evaporation radiation [2] (c)
A short time after switching
on the soldering iron, it reaches a steady temperature, even though the heater coil is
constantly generating heat. The soldering iron is rated
at 40 W. What is the rate at which
heat is being lost from the soldering iron? Tick one
box. greater than 40 W equal to 40 W less than 40 W [1] [Total: 6]
8
A square wooden block is made
to rotate 3000 times per minute. A springy metal strip presses against the block, as shown
in Fig. 8.1. A person nearby observes what is happening. 3000 rotations / minute springy metal strip
Fig. 8.1
(a)
Calculate how many times per
second the block rotates. number of rotations per
second = ....................... [1]
(b)
Calculate the frequency of
the sound caused by this arrangement. frequency = ................
Hz [2]
(c)
State whether or not this
sound could be heard by the person nearby, and give a reason for your answer.
... [1]
[Total: 4]
9 (a)
Fig. 9.1 shows two resistors
connected to a 6 V battery. 6 V X Y 2 Ω 10 Ω
Fig. 9.1 (i)
What name do we use to
describe this way of connecting resistors? [1]
(ii)
Calculate the combined
resistance of the two resistors. combined resistance =
.................. [1]
(iii)
Calculate the current in the
circuit. current =
...................... [4]
(iv)
Use your answer to (a)(iii)
to calculate the potential difference across the 10 resistor.
potential difference =
.................. V [2]
(v)
State the potential
difference between terminals X and Y. .................. V [1]
16
(b)
The circuit in Fig. 9.2 is
similar to the circuit in Fig. 9.1, but it uses a resistor AB
with a sliding contact. 6 V X Y A B sliding contact
Fig. 9.2
i)
State the potential
difference between X and Y when the sliding contact is at
1.
end A of the resistor,
.............. V
2.
end B of the resistor.
.............. V [2]
(ii)
The sliding contact of the
resistor AB is moved so that the potential difference
between X and Y is 5 V.
On Fig. 9.2, mark with the
letter C the position of the sliding contact. [1]
[Total: 12]
17
0625/02/M/J/07
[Turn over
For
Examiner’s
Use
© UCLES 2007
10
Your teacher gives you a
length of wire, a sensitive millivoltmeter and a powerful
magnet. You
are asked to demonstrate the
induction of an e.m.f. in the wire.
(a)
Describe what you would do.
[2]
(b)
How would you know that an
e.m.f. has been induced?
...................................................................................................................................
[1]
(c)
Name a device which makes use
of electromagnetic induction.
...................................................................................................................................
[1]
[Total: 4]
18
For
Examiner’s
Use
© UCLES 2007
11
Fig. 11.1 shows a bar magnet
on a board in a region where the magnetic field of the surroundings is so weak it
can be ignored. The letters N and S show the positions of the north and south poles of the
magnet. Also on the diagram are marked four dots. N S
Fig. 11.1
(a)
On Fig. 11.1, carefully draw
four magnetic field lines, one passing through each of the four dots. The lines you draw
should begin and end either on the magnet or at the edge
of the board. [5]
(b)
On one of your lines, put an
arrow to show the direction of the magnetic field. [1]
[Total: 6]
12
Three particles you have
learned about are protons, neutrons and
electrons.
(a)
How many of each of these
particles
(i)
are found in an -particle, number of protons =
................... number of neutrons =
................... number of electrons =
................... [1]
(ii)
are found in a - article? number of protons =
................... number of neutrons =
................... number of electrons =
................... [1]
(b)
Sodium-24 can be represented
as 24
11Na. How many of each of these
particles are there in a neutral atom of 24 11Na? number of protons =
..................... number of neutrons =
..................... number of electrons =
..................... [3]
(c)
A nucleus of sodium-24 decays
to become magnesium-24, by the emission of one particle. The equation below
describes this change. The symbol x y represents the emitted
particle. 24 11Na 24 12Mg + x y
(i)
State the value of x.
.................... [1]
(ii)
State the value of y.
.................... [1]
(iii)
What type of particle is ?
.................... [1]
[Total: 8]
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