Preliminary Examinations 2009
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PRELIMINARY EXAMINATIONS 2009 Secondary 4 Express / 5 Normal (Academic)
5116/02
SCIENCE Paper 2 Physics
Tuesday 11th August 2009 TIME
11.20 AM – 12.35 PM
DURATION
1 hour 15 minutes
Candidates answer on the Question Paper
READ THESE INSTRUCTIONS FIRST Write your name, index number and class on the answer papers. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use paper clips, highlighters, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided on the question paper. Section B Answer any two questions. Write your answers on the lined paper provided and, if necessary, continue on separate answer paper. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.
For Examiner’s Use Candidate Name: ________________________ (
)
Section A Section B
Class: Secondary ____
45 20
Q Parent’s Signature: _______________ Q TOTAL
65
This document consists of 12 printed pages and 2 lined pages.
© Hillgrove Secondary School 2009
[Turn over
2 For Examiner’s Use
Section A Answer all the questions. Write your answers in the spaces provided on the question paper. 1
Fig. 1.1 shows two forces of magnitudes 40 N and 30 N acting on an object O. The forces are at right-angles to each other. The diagram is not to scale. 40 N
90° 30 N
O Fig. 1.1
On the grid below, draw a vector diagram to determine the resultant force on object O. State the magnitude of the resultant force and show its direction on your vector diagram.
O
magnitude =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
N [4]
3
2
For Examiner’s Use
Fig. 2.1 shows how the speed of a vehicle varies with time. speed (m/s)
12
8
4
time (s)
0 2
4
6
8
10
12
Fig. 2.1
(a)
Calculate the deceleration of the vehicle.
deceleration = (b)
m/s2 [2]
Calculate the total distance travelled by the vehicle during the 10 s journey.
distance =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
m [2]
[Turn over
4
3
Wooden corks were investigated on Earth by scientists. When testing one sample, the mass was found to be 0.80 kg and its dimension was 0.40 m by 0.20 m by 0.05 m. The gravitational field strength on Earth is 10 N/kg and on the Moon is 1.6 N/kg. (a)
The sample was brought to the Moon. (i)
State the mass of the cork as measured on the Moon.
mass = (ii)
Calculate the weight of the cork as measured on the Moon.
weight = (iii)
[2]
The sample was then brought to Mars. It exerted a gravitational force of 2.95 N on the surface of Mars. Calculate the greatest pressure exerted by the cork on a flat surface of Mars.
pressure = (c)
[1]
Calculate the density of the cork on the Moon and give the unit.
density = (b)
[1]
Pa [3]
Explain why cork is an effective thermal insulator.
[2]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
For Examiner’s Use
5
4
(a)
Light, X-rays and gamma rays are components of the electromagnetic spectrum that are used in hospitals for diagnosing or treating illness. (i)
For Examiner’s Use
State the type of waves for electromagnetic waves. [1]
For each component, describe how they are used to diagnose or treat illness. (ii)
light
[1] (iii)
X-rays
[1] (iv)
gamma rays
[1] (b)
Some microwaves have a frequency of 800 MHz. They travel through air with a speed of 300 000 km/s. (i)
Define frequency.
[1] (ii)
Calculate the period of the microwaves.
period = (iii)
s [1]
Calculate the wavelength of the microwaves and give the unit.
wavelength =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[2]
[Turn over
6
5
Fig. 5.1 shows an object placed in front of a thin converging lens. The positions of the focal points are marked F. thin converging lens
object
F
F
Fig. 5.1
(a)
(i)
On Fig. 5.1, draw rays from the object to determine the position of the top of the image. Mark the position, I, on the top of the image. [3]
(ii)
State three characteristics of the image.
[3] (b)
The refractive index of the glass of the lens is 1.5. The speed of light in air is 3.0 x 108 m/s. Calculate the speed of light in glass.
speed =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
m/s [1]
For Examiner’s Use
7
6
A student carried out two experiments on sound. (a)
To determine the speed of sound, the student employed a friend to fire a cannon at a certain distance, and then timed the interval between the sight of the smoke and the sound of the ‘boom’. (i)
If the distance was 500 m and the time taken was 1.6 s, calculate the speed of sound in air.
speed = (ii)
For Examiner’s Use
m/s [1]
State one possible factor which could affect the result.
[1] (b)
The student stretched a rubber band between the thumb and the first finger. By plucking the stretched rubber band, a sound is produced. (i)
Explain how the student can produce a louder sound.
[1]
(ii)
Explain how the student can produce a sound of a higher pitch.
[1]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[Turn over
8
7
Fig. 7.1 shows a part of a device called a gold leaf electroscope. The plate, rod and leaf are all made of metal. Fig. 7.2 shows what happens to the gold leaf when a positively charged strip is held close to the plate.
Explain why the leaf moves away from the rod when the positively charged strip is held near the plate.
[3]
8
Three wires, X, Y and Z, are made from the same material. Wire X of cross-sectional area 2A and length l has a resistance of 12 Ω. Wire Y has cross-sectional area A and length l. Wire Z has cross-sectional area 2A and length 3l. Complete Fig. 8.1 for wires Y and Z.
[2]
wire
cross-sectional area
length
resistance / Ω
X
2A
l
12
Y
A
l
Z
2A
3l Fig. 8.1
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
For Examiner’s Use
9
9
For Examiner’s Use
Fig. 9.1 shows an electric bell.
solenoid
Fig. 9.1
Describe how an electric bell works when the switch is closed.
[4]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[Turn over
10
Section B Answer any two questions. Write your answers on the lined pages and, if necessary, continue on separate answer paper. 10
Fig. 10.1 shows a plank with three balls in equilibrium. The pivot is at the centre of the plank. 50 cm
33 cm
A
4 cm B
4.0 kg
M
500 g
Fig. 10.1
(a)
(b)
(i)
State the principle of moments for a body in equilibrium.
[1]
(ii)
Calculate the mass of ball M.
[3]
Ball B is removed from the plank and ball A rolls down the plank with an acceleration of 1.6 m/s2. Calculate, for ball A, (i)
the force needed to give this acceleration,
[2]
(ii)
its speed after 2.0 s, and
[2]
(iii)
its kinetic energy after 2.0 s.
[2]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
11
11
Fig 11.1 shows a liquid substance S being heated by an immersion heater in a metal container with blackened and dull surface.
thermometer
substance S
immersion heater Fig. 11.1
The temperature of substance S was taken at regular intervals until all of the substance is boiled. Fig. 11.2 shows the graph that was drawn from the result. 70 60 50 40 30
Fig. 11.2
(a)
Describe the speed and position of the molecules of substance S between A and B. [2]
(b)
Explain how heat is spread by convention between A and B.
(c)
The metal container with blackened and dull surface is replaced with another similar metal container with polished surface. State what differences, if any, you would expect to observe in sections AB and BC of the graph. [2]
(d)
In both evaporation and in boiling, a liquid changes into a gas. State three differences between evaporation and boiling. [3]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[3]
[Turn over
12
12
(a)
Fig. 12.1 shows two identical bulbs connected with a 10.0 V battery, a switch, a resistor, a voltmeter and an ammeter. In the circuit, the ammeter reading is 2.0 A when the voltmeter reading is 8.0 V. 10.0 V
Fig. 12.1
Calculate the
(b)
(i)
resistance of each bulb,
[2]
(ii)
power of each bulb, and
[2]
(iii)
current that flows through the battery.
[1]
Fig 12.2 shows a series circuit. The e.m.f. of the battery is 10.0 V and the maximum resistance of the variable resistor is 30 Ω. 10.0 V
30 Ω
20 Ω Fig. 12.2
Calculate the (i)
maximum possible current flowing in the circuit,
[1]
(ii)
minimum possible current flowing in the circuit,
[1]
(iii)
maximum possible potential difference across the 20 Ω resistor,
[1]
(iv)
minimum possible potential difference across the 20 Ω resistor, and
[1]
(v)
maximum possible power that can be dissipated in the 20 Ω resistor.
[1]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
13 For Examiner’s Use
Question:
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[Turn over
14 For Examiner’s Use
Question:
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
5116/02
SCIENCE Paper 2 Physics
Tuesday 11th August 2009 TIME
11.20 AM – 12.35 PM
DURATION
1 hour 15 minutes
Candidates answer on the Question Paper
READ THESE INSTRUCTIONS FIRST Write your name, index number and class on the answer papers. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs, tables or rough working. Do not use paper clips, highlighters, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided on the question paper. Section B Answer any two questions. Write your answers on the lined paper provided and, if necessary, continue on separate answer paper. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question.
For Examiner’s Use Candidate Name: ________________________ (
)
Section A Section B
Class: Secondary ____
45 20
Q Parent’s Signature: _______________ Q TOTAL
65
This document consists of 12 printed pages and 2 lined pages.
© Hillgrove Secondary School 2009
[Turn over
2 For Examiner’s Use
Section A Answer all the questions. Write your answers in the spaces provided on the question paper. 1
Fig. 1.1 shows two forces of magnitudes 40 N and 30 N acting on an object O. The forces are at right-angles to each other. The diagram is not to scale. 40 N
90° 30 N
O Fig. 1.1
On the grid below, draw a vector diagram to determine the resultant force on object O. State the magnitude of the resultant force and show its direction on your vector diagram.
O
magnitude =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
N [4]
3
2
For Examiner’s Use
Fig. 2.1 shows how the speed of a vehicle varies with time. speed (m/s)
12
8
4
time (s)
0 2
4
6
8
10
12
Fig. 2.1
(a)
Calculate the deceleration of the vehicle.
deceleration = (b)
m/s2 [2]
Calculate the total distance travelled by the vehicle during the 10 s journey.
distance =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
m [2]
[Turn over
4
3
Wooden corks were investigated on Earth by scientists. When testing one sample, the mass was found to be 0.80 kg and its dimension was 0.40 m by 0.20 m by 0.05 m. The gravitational field strength on Earth is 10 N/kg and on the Moon is 1.6 N/kg. (a)
The sample was brought to the Moon. (i)
State the mass of the cork as measured on the Moon.
mass = (ii)
Calculate the weight of the cork as measured on the Moon.
weight = (iii)
[2]
The sample was then brought to Mars. It exerted a gravitational force of 2.95 N on the surface of Mars. Calculate the greatest pressure exerted by the cork on a flat surface of Mars.
pressure = (c)
[1]
Calculate the density of the cork on the Moon and give the unit.
density = (b)
[1]
Pa [3]
Explain why cork is an effective thermal insulator.
[2]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
For Examiner’s Use
5
4
(a)
Light, X-rays and gamma rays are components of the electromagnetic spectrum that are used in hospitals for diagnosing or treating illness. (i)
For Examiner’s Use
State the type of waves for electromagnetic waves. [1]
For each component, describe how they are used to diagnose or treat illness. (ii)
light
[1] (iii)
X-rays
[1] (iv)
gamma rays
[1] (b)
Some microwaves have a frequency of 800 MHz. They travel through air with a speed of 300 000 km/s. (i)
Define frequency.
[1] (ii)
Calculate the period of the microwaves.
period = (iii)
s [1]
Calculate the wavelength of the microwaves and give the unit.
wavelength =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[2]
[Turn over
6
5
Fig. 5.1 shows an object placed in front of a thin converging lens. The positions of the focal points are marked F. thin converging lens
object
F
F
Fig. 5.1
(a)
(i)
On Fig. 5.1, draw rays from the object to determine the position of the top of the image. Mark the position, I, on the top of the image. [3]
(ii)
State three characteristics of the image.
[3] (b)
The refractive index of the glass of the lens is 1.5. The speed of light in air is 3.0 x 108 m/s. Calculate the speed of light in glass.
speed =
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
m/s [1]
For Examiner’s Use
7
6
A student carried out two experiments on sound. (a)
To determine the speed of sound, the student employed a friend to fire a cannon at a certain distance, and then timed the interval between the sight of the smoke and the sound of the ‘boom’. (i)
If the distance was 500 m and the time taken was 1.6 s, calculate the speed of sound in air.
speed = (ii)
For Examiner’s Use
m/s [1]
State one possible factor which could affect the result.
[1] (b)
The student stretched a rubber band between the thumb and the first finger. By plucking the stretched rubber band, a sound is produced. (i)
Explain how the student can produce a louder sound.
[1]
(ii)
Explain how the student can produce a sound of a higher pitch.
[1]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[Turn over
8
7
Fig. 7.1 shows a part of a device called a gold leaf electroscope. The plate, rod and leaf are all made of metal. Fig. 7.2 shows what happens to the gold leaf when a positively charged strip is held close to the plate.
Explain why the leaf moves away from the rod when the positively charged strip is held near the plate.
[3]
8
Three wires, X, Y and Z, are made from the same material. Wire X of cross-sectional area 2A and length l has a resistance of 12 Ω. Wire Y has cross-sectional area A and length l. Wire Z has cross-sectional area 2A and length 3l. Complete Fig. 8.1 for wires Y and Z.
[2]
wire
cross-sectional area
length
resistance / Ω
X
2A
l
12
Y
A
l
Z
2A
3l Fig. 8.1
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
For Examiner’s Use
9
9
For Examiner’s Use
Fig. 9.1 shows an electric bell.
solenoid
Fig. 9.1
Describe how an electric bell works when the switch is closed.
[4]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[Turn over
10
Section B Answer any two questions. Write your answers on the lined pages and, if necessary, continue on separate answer paper. 10
Fig. 10.1 shows a plank with three balls in equilibrium. The pivot is at the centre of the plank. 50 cm
33 cm
A
4 cm B
4.0 kg
M
500 g
Fig. 10.1
(a)
(b)
(i)
State the principle of moments for a body in equilibrium.
[1]
(ii)
Calculate the mass of ball M.
[3]
Ball B is removed from the plank and ball A rolls down the plank with an acceleration of 1.6 m/s2. Calculate, for ball A, (i)
the force needed to give this acceleration,
[2]
(ii)
its speed after 2.0 s, and
[2]
(iii)
its kinetic energy after 2.0 s.
[2]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
11
11
Fig 11.1 shows a liquid substance S being heated by an immersion heater in a metal container with blackened and dull surface.
thermometer
substance S
immersion heater Fig. 11.1
The temperature of substance S was taken at regular intervals until all of the substance is boiled. Fig. 11.2 shows the graph that was drawn from the result. 70 60 50 40 30
Fig. 11.2
(a)
Describe the speed and position of the molecules of substance S between A and B. [2]
(b)
Explain how heat is spread by convention between A and B.
(c)
The metal container with blackened and dull surface is replaced with another similar metal container with polished surface. State what differences, if any, you would expect to observe in sections AB and BC of the graph. [2]
(d)
In both evaporation and in boiling, a liquid changes into a gas. State three differences between evaporation and boiling. [3]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[3]
[Turn over
12
12
(a)
Fig. 12.1 shows two identical bulbs connected with a 10.0 V battery, a switch, a resistor, a voltmeter and an ammeter. In the circuit, the ammeter reading is 2.0 A when the voltmeter reading is 8.0 V. 10.0 V
Fig. 12.1
Calculate the
(b)
(i)
resistance of each bulb,
[2]
(ii)
power of each bulb, and
[2]
(iii)
current that flows through the battery.
[1]
Fig 12.2 shows a series circuit. The e.m.f. of the battery is 10.0 V and the maximum resistance of the variable resistor is 30 Ω. 10.0 V
30 Ω
20 Ω Fig. 12.2
Calculate the (i)
maximum possible current flowing in the circuit,
[1]
(ii)
minimum possible current flowing in the circuit,
[1]
(iii)
maximum possible potential difference across the 20 Ω resistor,
[1]
(iv)
minimum possible potential difference across the 20 Ω resistor, and
[1]
(v)
maximum possible power that can be dissipated in the 20 Ω resistor.
[1]
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
13 For Examiner’s Use
Question:
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
[Turn over
14 For Examiner’s Use
Question:
© Hillgrove Secondary School 2009
5116/02/Prelims/4E/5N
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