TASMANIAN QUALIFICATIONS AUTHORITY
PLACE LABEL HERE
Tasmanian Certificate of Education
PHYSICAL SCIENCES
Senior Secondary 5C
Subject Code: PSC5C
External Assessment
2006
Part 1
Time: approximately 45 minutes
On the basis of your performance in this examination, the examiners will
provide a result on the following criteria taken from the syllabus statement:
Criterion 6
Demonstrate knowledge and understanding of the impact
of science on society and the environment.
Criterion 7
Demonstrate knowledge and understanding of the
principles of forces and motion.
Pages:
Questions:
©
11
7
Copyright for part(s) of this examination may be held by individuals and/or organisations
other than the Tasmanian Qualifications Authority.
Physical Sciences – Part 1
CANDIDATE INSTRUCTIONS
Candidates MUST ensure that they have addressed ALL of the externally assessed criteria on
this examination paper.
Answer ALL questions. Answers must be written in the spaces provided on the examination
paper.
The 2006 Physical Sciences Information Sheet can be used throughout the examination.
No other printed material is allowed into the examination.
Spend about 45 minutes in total answering the questions in this booklet.
No credit can be given for incorrect answers unless they are accompanied by details of the
working. Some credit will be given for unsimplified answers. Appropriate units must be
included.
Each part includes a question that is used in the assessment of Criterion 6.
Page 2
Physical Sciences – Part 1
For
Marker
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Only
Question 1
This question assesses Criterion 7.
(a)
-1
-1
Convert a speed of 50.0 km h to a speed in m s .
(1 mark)
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.............................................................................................................................................
(b)
When answering these parts you will need to show your working in order to gain
full marks.
-1
A car is travelling at a speed of 50.0 km h due north on a straight and level road
when the driver brakes to avoid hitting an obstacle. The car takes 5.00 s to come to
rest.
Calculate:
(i)
The acceleration of the car when coming to rest.
(2 marks)
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(ii)
The displacement of the car in the 5.00 s it takes to come to rest.
(2 marks)
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Physical Sciences – Part 1
Question 2
This question assesses Criterion 7.
In the space provided below neatly sketch a velocity-time graph for a ball dropped onto a
smooth concrete floor. After bouncing, the ball is caught at about half the height from which it
was dropped. On your graph indicate when the ball changes its direction of motion and when
it is caught.
(4 marks)
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Physical Sciences – Part 1
Question 3
This question assesses Criterion 7.
When answering this question you will need to show your working, in order to gain full
marks.
A firecracker of mass 105 g was placed on a near friction-free flat surface. The firecracker
exploded into two fragments that travelled apart in opposite directions. A fragment of mass
-1
60.0 g travelled to the left with a speed of 20.0 m s . Calculate the velocity of the smaller
fragment just after the explosion.
(4 marks)
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Physical Sciences – Part 1
Question 4
This question assesses Criterion 7.
When answering this question you will need to show your working in order to gain full marks.
On a calm day a hot air balloon of total mass 350.0 kg rises vertically from rest with an
-2
acceleration of 0.500 m s upwards.
(a)
Calculate the weight of the balloon.
(1 mark)
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(b)
Calculate the resultant (net) force acting on the balloon as it rises.
(2 marks)
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(c)
Calculate the upwards lift force acting on the balloon.
(2 marks)
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Physical Sciences – Part 1
Question 5
This question assesses Criterion 7.
When answering this question you will need to show your working in order to gain full marks.
A stone was thrown horizontally from a lookout point overlooking the sea with a velocity of
-1
28.0 m s horizontally. When thrown the stone was at a vertical height of 95.0 m above the
sea. Ignore air resistance when answering the following questions.
(a)
Determine the time it took for the stone to reach the sea.
(2 marks)
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(b)
Calculate the vertical velocity of the stone as it entered the sea.
(2 marks)
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(c)
In the space provided below, draw an appropriate vector diagram and use this to
calculate the resultant (net) velocity of the stone as it entered the sea.
(4 marks)
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Physical Sciences – Part 1
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Question 6
This question assesses Criterion 7.
Answer each of the following in the spaces provided.
(a)
While driving down the road, Anna observes an insect striking the windscreen of her
car. Is the force of the insect on the windscreen greater, less than, or the same as the
force of the windscreen on the insect? Give the reason for your answer using at least one
of Newton’s Laws of Motion.
(2 marks)
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(b)
A sky diver steps from a hovering helicopter and the vertical forces acting on her after
1.00 s and 20.0 s are shown in the force diagrams below that have been drawn to the
same scale. The sky diver is represented by the circle.
t = 1.00 s
(i)
t = 20.0 s
Compare the resultant, or net force acting on the sky diver at 1.00 s with that at
20.0 s.
(2 marks)
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Question 6 continues opposite.
Page 8
Physical Sciences – Part 1
Question 6 (continued)
(ii)
The sky diver opens her parachute 25.0 s after leaving the helicopter. In the space
below, draw another diagram representing the vertical forces acting on the sky
diver as her parachute opens. Label the forces and indicate their relative sizes.
(2 marks)
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Physical Sciences – Part 1
Question 7
This question assesses Criterion 6.
The table below shows the overall stopping distances for a car, tested on the same straight
road with the same experienced driver.
-1
Speed (m s )
10.0
20.0
30.0
40.0
Reaction time
distance (m)
6.00
12.0
18.0
24.0
Braking distance
(m)
6.00
24.0
54.0
96.0
Overall stopping
distance (m)
12.0
36.0
72.0
120.0
(The ‘reaction time distance’ is the distance travelled during the driver’s reaction time. The
reaction time is the time between seeing something ahead and applying the brakes.
(a)
Determine the driver’s reaction time. You will need to show your working.
(2 marks)
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(b)
-1
Predict the stopping distance for a speed of 50.0 m s . Using the table, show how you
arrive at your answer.
(3 marks)
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(c)
In everyday driving conditions, what factors may affect the overall stopping distance of
the car? Give reasons with your answer.
(3 marks)
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Physical Sciences – Part 1
BLANK PAGE
Page 11
TASMANIAN QUALIFICATIONS AUTHORITY
PLACE LABEL HERE
Tasmanian Certificate of Education
PHYSICAL SCIENCES
Senior Secondary 5C
Subject Code: PSC5C
External Assessment
2006
Part 2
Time: approximately 45 minutes
On the basis of your performance in this examination, the examiners will provide
a result on the following criteria taken from the syllabus statement:
Criterion 6
Demonstrate knowledge and understanding of the impact of
science on society and the environment.
Criterion 8
Demonstrate knowledge and understanding of the principles of
structures and properties of materials.
Pages:
Questions:
©
15
9
Copyright for part(s) of this examination may be held by individuals and/or organisations other
than the Tasmanian Qualifications Authority.
Physical Sciences – Part 2
BLANK PAGE
Page 2
Physical Sciences – Part 2
CANDIDATE INSTRUCTIONS
Candidates MUST ensure that they have addressed ALL of the externally assessed criteria on this
examination paper.
Answer ALL questions. Answers must be written in the spaces provided on the examination paper.
The 2006 Physical Sciences Information Sheet can be used throughout the examination.
No other printed material is allowed into the examination.
Spend about 45 minutes in total answering the questions in this booklet.
No credit can be given for incorrect answers unless they are accompanied by details of the working.
Some credit will be given for unsimplified answers. Appropriate units must be included.
Each part includes a question that is used in the assessment of Criterion 6.
Page 3
Physical Sciences – Part 2
Question 8
This question assesses Criterion 8.
Complete the following table in the spaces provided. The first row has been done as an
example.
(4 marks)
Name
methane
Symbol or Formula
Bonding Type
CH4
covalent molecular
calcium fluoride
graphite
uranium
chlorine gas
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Physical Sciences – Part 2
Question 9
This question assesses Criterion 8.
Use your knowledge of bonding models to explain the following observations:
(a)
Crystals of potassium chloride are brittle. When hit with a hammer they shatter into tiny
fragments. Explain this property using a diagram, or otherwise.
(3 marks)
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(b)
Perfumes and aftershave lotions are mixtures of organic compounds which have low
boiling points that give rise to distinctive odours.
(3 marks)
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Physical Sciences – Part 2
Question 10
This question assesses Criterion 8.
In the spaces provided below, draw an electron dot (‘Lewis’) diagram for each of the
following substances.
(4 marks)
phosphorus trichloride (PCl3 )
propyne (C3 H4 )
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Physical Sciences – Part 2
Question 11
This question assesses Criterion 8.
For each general formula listed below, give an example of an ionic compound with that type
of formula. (X and Y do not represent the symbols of elements.)
(4 marks)
General formula Example of an ionic compound with this type
of formula. You may give either its correct
chemical name or its formula.
X2 Y
XY2
X2 Y3
XY3
Page 7
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Physical Sciences – Part 2
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Question 12
This question assesses Criterion 8.
Complete the following table.
(4 marks)
Chemical name of compound
Structural formula of compound
H
2-methylbut-1-ene
2-bromo-3-methylbut-2-ene
Page 8
F
Cl
H
C
C
C
H
H
H
H
H
H
H
C
C
Br
H
C
C
Br
H
Br
Physical Sciences – Part 2
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Question 13
This question assesses Criterion 8.
Under suitable conditions polyvinyl chloride (PVC) is formed when chloroethene shown
below reacts with many more molecules of itself.
Cl
H
C
C
H
H
Using three units in your answer, show how chloroethene can form the polymer PVC.
(2 marks)
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Page 9
Physical Sciences – Part 2
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Question 14
This question assesses Criterion 8.
Complete the following table:
Isotope symbol
(3 marks)
No. of protons
No. of neutrons
6
8
28 3+
Al
13
€
16 2O
8
€
Page 10
No. of electrons
6
Physical Sciences – Part 2
Question 15
This question assesses Criterion 8.
(a)
The electrical conductivity of metals is explained by the theory that metals possess
delocalised valence electrons. Explain how the delocalised valence electrons result in
the metal being a good electrical conductor.
(2 marks)
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(b)
Describe a simple laboratory test to show that copper (II) chloride (CuCl2 ) is an example
of an ionic solid. Briefly explain how the information gained supports the conclusion
that copper (II) chloride is an ionically bonded solid.
(3 marks)
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Physical Sciences – Part 2
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Question 16
This question assesses Criterion 6.
(a)
You are a laboratory assistant working for customs. A customs officer has given you a
plastic bag containing a powder that was found in the luggage of a visitor. The visitor
claims the bag contains powdered common salt (sodium chloride).
You subject the white powder to various laboratory tests, the results of which are
summarised below:
Colour
White
Odour
Odourless
Stability
Does not decompose or react with the air when kept at 15˚C.
Solubility
Slightly soluble in water to form a solution which has a pH of 8
Melting point
98˚C
Electrical conductivity
Very poor in the solid or liquid states, or in aqueous solution.
From the above information, could the powder be sodium chloride? Justify your
decision giving full reasons.
(4 marks)
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Question 16 continues opposite.
Page 12
Physical Sciences – Part 2
Question 16 (continued)
(b)
The packaging on the milk carton shown below states that the milk contains calcium and
sodium.
(i)
Does the milk contain calcium and sodium atoms or calcium and sodium ions?
Justify your decision giving full reasons.
(3 marks)
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(ii)
Reference is made on the packaging to saturated fats. Explain in terms of carbon
bonding what this term means.
(1 mark)
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Physical Sciences – Part 2
BLANK PAGE
Page 14
Physical Sciences – Part 2
BLANK PAGE
Page 15
TASMANIAN QUALIFICATIONS AUTHORITY
PLACE LABEL HERE
Tasmanian Certificate of Education
PHYSICAL SCIENCES
Senior Secondary 5C
Subject Code: PSC5C
External Assessment
2006
Part 3
Time: approximately 45 minutes
On the basis of your performance in this examination, the examiners will provide
a result on the following criteria taken from the syllabus statement:
Criterion 6
Demonstrate knowledge and understanding of the impact of
science on society and the environment.
Criterion 9
Demonstrate knowledge and understanding of the principles of
sources and properties of energy.
Pages:
Questions:
©
11
7
Copyright for part(s) of this examination may be held by individuals and/or organisations other
than the Tasmanian Qualifications Authority.
Physical Sciences – Part 3
BLANK PAGE
Page 2
Physical Sciences – Part 3
CANDIDATE INSTRUCTIONS
Candidates MUST ensure that they have addressed ALL of the externally assessed criteria on this
examination paper.
Answer all questions on this paper. Answers must be written in the spaces provided on the
examination paper.
The 2006 Physical Sciences Information Sheet can be used throughout the examination.
No other printed material is allowed into the examination.
Spend about 45 minutes in total answering the questions in this booklet.
No credit can be given for incorrect answers unless they are accompanied by details of the working.
Some credit will be given for unsimplified answers. Appropriate units must be included.
Each part includes a question that is used in the assessment of Criterion 6.
Page 3
Physical Sciences – Part 3
Question 17
This question assesses Criterion 9.
(a)
State the Law of Conservation of Energy.
(1 mark)
.............................................................................................................................................
.............................................................................................................................................
(b)
The drawing below shows a proposed device intended to create energy out of nothing.
In the drawing, continuously falling water is shown turning a water wheel. However, it
is not possible to build such a device. Using the Law of Conservation of Energy explain
why this particular device does not work.
(3 marks)
Water wheel
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Physical Sciences – Part 3
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Question 18
This question assesses Criterion 9
-1
A 55.0 g ball was thrown vertically upwards with a speed of 12.0 m s . When answering this
question, you will need to show your working to gain full marks. Assume air resistance is
negligible.
(a)
Calculate the kinetic energy of the ball at the instant it was thrown.
(2 marks)
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(b)
How much gravitational potential energy is possessed by the ball at its highest point?
(1 mark)
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(c)
-1
Calculate the gravitational potential energy of the ball when its velocity is 4.00 m s
downwards.
(2 marks)
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(d)
-1
Calculate the height of the ball when its velocity is 4.00 m s downwards.
(2 marks)
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Page 5
Physical Sciences – Part 3
Question 19
This question assesses Criterion 9.
Complete the following table in the spaces provided.
Species
Mass
number
(4 marks)
Electrical
charge
Penetration in air
alpha particle (α)
beta particle (β)
gamma radiation (γ)
neutron (n)
very large distances
Question 20
This question assesses Criterion 9.
(a)
Complete the following nuclear equations by identifying the particle shown as X.
(1 mark)
14
6C
 147 N + X
X = _______________________________________
€
€
(b)
Thorium-234 ( 234
90Th) undergoes α-decay. Write down the nuclear equation for this
decay.
(2 marks)
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€
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Physical Sciences – Part 3
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Question 21
This question assesses Criterion 9.
Technetium-99 ( 99
43Tc) is commonly used as a tracer in medical diagnosis. Its half life is 6.00
hours and it decays by way of beta (β) particle emission.
(a)
Write a nuclear equation showing the decay of technetium-99.
(2 marks)
€
.............................................................................................................................................
.............................................................................................................................................
When tested initially with a Geiger counter, a 50 mg sample of technetium-99 gave a radiation
count of 300 Bq.
(b)
Determine the mass of technetium-99 remaining after 36.0 hours. Show your working.
(2 marks)
.............................................................................................................................................
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(c)
Explain what has happened to the ‘missing’ mass of technetium-99 after 36 hours.
(2 marks)
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(d)
After how many hours will the sample of Tc-99 have a radiation count of approximately
40 Bq? Show your working.
(2 marks)
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Page 7
Physical Sciences – Part 3
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Question 22
This question assesses Criterion 9.
When you answer this question, you will need to show your working in order to gain full
marks.
A current of 56.0 mA passes through a resistor when a potential difference of 9.00 V is
applied to it.
(a)
Calculate the resistance of this resistor.
(2 marks)
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(b)
Calculate the charge that passes through the resistor in 20.0 minutes.
(2 marks)
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(c)
Calculate the energy the resistor uses in 20.0 minutes of operation.
(2 marks)
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Page 8
Physical Sciences – Part 3
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Question 23
This question assesses Criterion 6.
(a)
(i)
Explain what is likely to happen when an American kitchen appliance, designed to
operate using the American domestic 110 V mains supply, is fitted with the
correct electrical plug and connected to the Australian 240 V mains supply. Will it
function correctly?
(2 marks)
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(ii)
As a prize in a recent promotion, the Tasmanian electrical supplier Aurora offered
‘$100 worth of power’ to households. Explain why this advertisement is badly
worded from the point of view of a Physical Sciences student and how this should
be changed.
(2 marks)
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Question 23 continues over the page.
Page 9
Physical Sciences – Part 3
Question 23 (continued)
(b)
The following information was provided with a 240 V electrical extension lead
purchased at a local hardware store.
‘This lead must be fully uncoiled before use. The lead must not be used with a load
exceeding 3.0 A uncoiled, or 2.0 A coiled.’
(i)
Can a 2.5 kW heater be used with this extension lead uncoiled? Show how you
arrive at your answer.
(2 marks)
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(ii)
Suggest a likely reason why the current specified for the coiled extension lead is
less than when it is uncoiled.
(2 marks)
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Physical Sciences – Part 3
BLANK PAGE
Page 11
TASMANIAN QUALIFICATIONS AUTHORITY
PLACE LABEL HERE
Tasmanian Certificate of Education
PHYSICAL SCIENCES
Senior Secondary 5C
Subject Code: PSC5C
External Assessment
2006
Part 4
Time: approximately 45 minutes
On the basis of your performance in this examination, the examiners will provide
a result on the following criteria taken from the syllabus statement:
Criterion 6
Demonstrate knowledge and understanding of the impact of
science on society and the environment.
Criterion 10
Demonstrate knowledge and understanding of the principles of
chemical reactions and change.
Pages:
Questions:
©
11
7
Copyright for part(s) of this examination may be held by individuals and/or organisations other
than the Tasmanian Qualifications Authority.
Physical Sciences – Part 4
CANDIDATE INSTRUCTIONS
Candidates MUST ensure that they have addressed ALL of the externally assessed criteria on this
examination paper.
Answer all questions on this paper. Answers must be written in the spaces provided on the
examination paper.
The 2006 Physical Sciences Information Sheet can be used throughout the examination.
No other printed material is allowed into the examination.
Spend about 45 minutes in total answering the questions in this booklet.
No credit can be given for incorrect answers unless they are accompanied by details of the working.
Some credit will be given for unsimplified answers. Appropriate units must be included.
Each part includes a question that is used in the assessment of Criterion 6.
Page 2
Physical Sciences – Part 4
Question 24
This question assesses Criterion 10.
(a)
Balance this chemical equation.
HNO 3 (aq)
+
Fe(OH) 3 (aq)
(1 mark)
→
Fe(NO 3 ) 3 (aq)
+
H 2O(l)
.............................................................................................................................................
€ (b)
Write the balanced chemical equation that corresponds to the following word equation.
(2 marks)
potassium hydrogen carbonate(s) + sulfuric acid(aq) →
potassium sulfate(aq) + carbon dioxide(g) + water(l)
.............................................................................................................................................
.............................................................................................................................................
(c)
Write an ionic equation to show the reaction between copper (II) ions and hydroxide
ions in aqueous solution to form a precipitate of copper (II) hydroxide.
(2 marks)
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Physical Sciences – Part 4
Question 25
This question assesses Criterion 10.
A compound contains the elements carbon, hydrogen and oxygen. Its composition by mass is
carbon 37.5%, hydrogen 12.5%, with the remainder oxygen. When answering the following
questions you will need to show your working to gain full marks.
(a)
Calculate the empirical formula of this compound.
(3 marks)
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(b)
0.200 mole of the compound has a mass of 12.8 g. Calculate the molar mass of the
compound.
(1 mark)
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(c)
Calculate the molecular formula of the compound.
(2 marks)
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Physical Sciences – Part 4
Question 26
This question assesses Criterion 10.
When mixed, aqueous solutions of barium chloride and sodium sulfate react to form a
precipitate of barium sulfate.
BaCl2 (aq)
(a)
€
+
Na 2SO 4 (aq)
→
Write an ionic equation for the above reaction.
BaSO 4 (s)
+
2NaCl(aq)
(2 marks)
.............................................................................................................................................
.............................................................................................................................................
(b)
Calculate the molar mass of barium sulfate.
(1 mark)
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You will need to show your working in order to gain full marks when answering this part.
(c)
Using the reaction above, determine the mass of barium chloride that is required to
prepare 11.7 g of barium sulfate.
(3 marks)
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Physical Sciences – Part 4
Question 27
This question assesses Criterion 10.
A student is trying to determine the concentration of a hydrochloric acid solution. He finds
-1
that 20.1 mL of this acid just neutralizes a 25.0 mL volume of 0.102 mol L sodium
hydroxide solution:
NaOH(aq)
+ HCl(aq)
→
NaCl(aq)
+
H 2O(l)
Determine the concentration of the hydrochloric acid solution. You will need to show your
working to gain full marks.
(4 marks)
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Page 6
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Physical Sciences – Part 4
For
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Question 28
This question assesses Criterion 10.
A candy bar contains 36.5 g of glucose (C6 H12O6 ). Glucose reacts with oxygen in the cells of
the body as shown in the following equation:
C 6H12O 6 (aq)
+
6O 2 (aq)
→
6CO 2 (aq)
+
6H 2O(l)
Calculate the mass of oxygen required to fully react with the glucose in this candy bar. You
will need to show your working to gain full marks.
(4 marks)
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Page 7
Physical Sciences – Part 4
Question 29
This question assesses Criterion 10.
When answering this question, you will need to show your working in order to gain full
marks.
(a)
Consider 4.50 g of water.
(i)
Determine the number of molecules of water.
(2 marks)
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(ii)
Determine the number of hydrogen atoms.
(1 mark)
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(b)
Calculate the mass of the water molecule.
(2 marks)
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(c)
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15.0 mL of a 0.400 mol L calcium chloride solution is diluted with water to a solution
of total volume of 250.0 mL. Calculate the concentration of this diluted solution.
(2 marks)
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Page 8
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Physical Sciences – Part 4
For
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Question 30
This question assesses Criterion 6.
(a)
One major component of petrol is the hydrocarbon, octane, C8 H18. The equation below
shows the complete combustion of octane.
2C8H18 (l)
+
25O 2 (g)
→
16CO 2 (g)
+
18H 2O(g)
When a car’s engine is warming up, black and sooty exhaust gases may be formed as
unwanted by-products of the incomplete combustion of petrol.
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(i)
Explain this observation.
(2 marks)
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(ii)
Write a balanced chemical equation that is consistent with your explanation in (i).
(2 marks)
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(b)
There is strong evidence that acid rain can thin the egg shells laid by birds. This has led
to the unfortunate decline of some bird species. Egg shells are mainly calcium
carbonate. Assuming acid rain contains dilute nitric acid, give an explanation for the
thinning of the egg shells. Include a balanced chemical equation for this reaction.
(4 marks)
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Physical Sciences – Part 4
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Physical Sciences – Part 4
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