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IB/M/Jun23/E For Examinerâs Use Question Mark 1 2 3 4 5 6 7 8 9 TOTAL
Materials For this paper you must have:
a ruler a scientific calculator the Physics Equations Sheet (enclosed).
Instructions
Use black ink or black ball-point pen. Pencil should only be used for drawing. Fill in the boxes at the top of this page. Answer all questions in the spaces provided. Do not write outside the box around each page or on blank pages. Do all rough work in this book. Cross through any work you do not want to be marked. If you need extra space for your answer(s), use the lined pages at the end of this book. Write the question number against your answer(s). In all calculations, show clearly how you work out your answer.
Information
The maximum mark for this paper is 100. The marks for questions are shown in brackets. You are expected to use a calculator where appropriate. You are reminded of the need for good English and clear presentation in your answers. Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work . 31 IB/M/Jun23/8463/1H Do not write^ outside the box Question number Additional page, if required. Write the question numbers in the left-hand margin.
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IB/M/Jun23/8463/1H Do not write^ outside the box 7 0
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The air pressure in a car tyre changes if the temperature of the air in the tyre increases
Explain why.
[^4
marks] END OF QUESTIONS 2 IB/M/Jun23/8463/1H Do not write^ outside the box Answer all questions in the spaces provided. 1 Figure 1 shows how the National Grid connects a power station to consumers. Figure 1 1
.^
Complete the sentences. [2 marks] Transformer
X
causes the potential difference to
Transformer
X
causes the current to
Use the Physics Equations Sheet to answer questions
.^2
and
.^3
.^
Which equation links current ( I), power (
P
) and resistance (
R
[1 mark] Tick (
)^
one box. P
I R
P =
I^2 R
P =
I
(^2)
R
P
I
R
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Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 10 0
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What can be deduced about the atom from the paths taken by alpha particles D
,^
E
,^
F
and
G
in Figure 8
[1 mark] Tick (
)^
one box. The atom contains a nucleus. The atom contains protons, neutrons and electrons. The atom is mostly empty space. 0
.^
How is the Bohr model of the atom different from the nuclear model of the atom?
[^1
mark] 0
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Explain how an electron can move up and down between energy levels in an atom. [2 marks] Turn over for the next question 4 IB/M/Jun23/8463/1H Do not write^ outside the box 2 Figure 2 shows the equipment a student used to determine the specific heat capacity of iron. The iron block the student used has two holes, one for the heater and one for the thermometer. Figure 2 2
.^
Before the power supply was switched on, the thermometer was used to measure the temperature of the iron block. The student left the thermometer in the iron block for a few minutes before recording the initial temperature. Suggest why. [1 mark]
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Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 0
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Figure
shows how the temperature changed after the power supply was switched on. Figure
The energy transferred to the iron block between 5 and 10 minutes was 26 000 J. The mass of the iron block was 2.0 kg. Calculate the specific heat capacity of iron. Use information from Figure 3 and the Physics Equations Sheet. [4 marks] Specific heat capacity = J/kg °C 26 IB/M/Jun23/8463/1H Do not write^ outside the box The nucleus was discovered using an alpha particle scattering experiment. Alpha particles were directed at a sheet of gold foil. Figure 8 shows the paths taken by seven alpha particles
,^
A
,^
B
,^
C
,^
D
,^
E
,^
F
and
G
Figure 8 8
.^
Explain why alpha particle
A
takes the path shown in Figure 8
[
marks] 8
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Explain why the path of alpha particle
B
is more tightly curved than the path of alpha particle
C
[2 marks]
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Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 0
Figure
shows an electrical circuit used to heat the windscreen of a car. Each resistor in the circuit represents a heating element. Figure
.^
The 12 V battery supplies direct potential difference. What is meant by âdirect potential differenceâ? [1 mark] Use the Physics Equations Sheet to answer questions
.^2
and
.^3
.^
Which equation links charge flow (
Q
), energy (
E
) and potential difference (
V
[1 mark] Tick (
)^
one box. E
V Q
E = QV E
Q V
E
V
2 Q 23 Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 8 7
.^
In position s^
A
and
B
the baby is stationary. Describe the energy transfers as the baby moves from position
A
to position
B
[3 marks] 7
.^
In one position the extension of the spring is 8.0 cm. The elastic potential energy stored by the spring is 4.
J.
Calculate the spring constant of the spring. Use the Physics Equations Sheet.
[^4
marks] Spring constant = N/m Turn over for the next question
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IB/M/Jun23/8463/1H Do not write^ outside the box 0
A baby bouncer is a harness attached to a spring that hangs from a door frame. Figure 7 shows a baby in a baby bouncer in two positions. Figure 7 0
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The baby bouncer should not be used with babies that have a mass greater than 12 kg. Suggest one reason why. [1 mark] 8 IB/M/Jun23/8463/1H Do not write^ outside the box 3
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Calculate the charge flow through the 12 V battery when the battery transfers 5010 J of energy. [3 marks] Charge flow =
C
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Ice forms on the windscreen at a temperature of
0 °C.
The electrical circuit transfers 5010 J of energy to the ice. A mass of 0.015 kg of ice melts. Calculate the specific latent heat of fusion of water. Use the Physics Equations Sheet. [3 marks] Specific latent heat of fusion of water = J/kg
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IB/M/Jun23/8463/1H Do not write^ outside the box 0
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Determine the resistance of the filament lamp when the potential difference across it is +3.0 V. Use the Physics Equations Sheet. Use Figure 6 on page 18. [3 marks] Resistance = 0
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The current in the lamp is 0.21 A when the potential difference across the lamp is 6.0 V. Calculate the energy transferred by the filament lamp in 30 minutes. Use the Physics Equations Sheet. [5 marks] Energy transferred =
J
IB/M/Jun23/8463/1H Do not write^ outside the box 4 A remote village in the UK uses a hydroelectric generator to provide electricity. 4
.^
In one day, 2 500 000 kg of water passes through the hydroelectric generator. The change in gravitational potential energy of the water is 367.5 MJ. gravitational field strength = 9.8 N/kg Calculate the mean change in vertical height of the water as it moves through the hydroelectric generator. Use the Physics Equations Sheet. [4 marks] Mean change in vertical height = m
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Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 0
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The generator transfers 3.0 kW of electrical power. Calculate the time taken for the generator to transfer 2.16 Ă 10 7 J of energy. Use the Physics Equations Sheet. Give your answer in standard form. [5 marks] Time taken (in standard form) = s Question 4 continues on the next page 19 Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 6
.^
Describe a method the student could use to obtain these results. You should include a circuit diagram.
[^6
marks]
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Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 0
Some isotopes emit nuclear radiation. 0
.^
Carbon -14 and carbon-12 are isotopes of carbon. Compare the structure of an atom of carbon -14 with the structure of an atom of carbon
[3 marks] 0
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Carbon -14 is a radioactive isotope. Carbon -14 has a half-life of 5700 years. What does âa half -life of 5700 yearsâ mean? [1 mark] Question 5 continues on the next page 16 IB/M/Jun23/8463/1H Do not write^ outside the box 17 5
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Workers in the nuclear power industry are exposed to nuclear radiation. Pilots on aircraft are exposed to cosmic radiation from space. daily dose caused by working in a nuclear power station = 0.00050 mSv hourly dose from cosmic rays to a pilot while flying = 0.0030 mSv Calculate the number of days it takes for a nuclear power station worker to receive the same dose as a pilot flying for 24 hours. [3 marks] Number of days =
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Turn over IB/M/Jun23/8463/1H Do not write^ outside the box 0
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People who work in the nuclear power industry need to be aware of irradiation and contamination. Describe the difference between irradiation and contamination. [2 marks] 0
.^
Give one health risk to a person working close to a source of nuclear radiation. [1 mark] 0
.^
W
orkers in nuclear power stations are monitored to check the radiation they emit. A worker stands 1 cm away from a radiation detector. The amount of radiation the worker emits is recorded. Explain why the worker needs to stand close to the radiation detector. [2 marks] 14 IB/M/Jun23/8463/1H Do not write^ outside the box Table 1 gives the half
- life of some other radioactive isotopes. Table 1 Isotope Half-life in seconds Nitrogen-
Nitrogen-
Fluorine-
Fluorine-
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A sample of fluorine -17 has an activity that is one quarter of its original activity. Calculate the age of the sample of fluorine
[2 marks] Age = s 5
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All of the isotopes in Table 1 emit beta radiation. Explain which isotope would cause the biggest risk to a personâs health based only on the half -life of each isotope. [3 marks]
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