Aqa
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
PHYSICS
Paper 1
Wednesday 17 May 2023 Morning Time allowed: 1 hour 30 minutes
Materials
For Examiner’s Use
For this paper you must have:
a pencil and a ruler Question Mark
a scientific calculator
1
a Data and Formulae Booklet
2
a protractor.
3
Instructions 4
Use black ink or black ball-point pen. 5
Fill in the boxes at the top of this page.
6
Answer all questions.
You must answer the questions in the spaces provided. Do not write TOTAL
outside the box around each page or on blank pages.
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).
Do all rough work in this book. Cross through any work you do not want
to be marked.
Show all your working.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 70.
You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
verified
, 7407/1
verified
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 interaction between a negative kaon (K−) and a proton (p) produces
A strong
an omega-minus (Ω−) particle, a neutral kaon (K0) and an unidentified particle Y.
The interaction is:
K− + p → Ω− + K0 + Y
Table 1 contains information on the particles in this interaction.
Table 1
K− p Ω− K0 Y
Rest energy / MeV 493.8 938.3 1672 497.8 493.8
Baryon number +1 +1 0
Charge −1e +1e −1e 0
Strangeness −1 0 −3 +1
0 1 .1 Complete Table 1.
[2 marks]
0 1 .2 Calculate, in J, the rest energy of the Ω−.
[2 marks]
rest energy = J
, 3
Do not write
outside the
0 1 . 3 Suggest how energy is conserved in this interaction. box
Refer to the rest energies of the particles in Table 1.
[2 marks]
The quark structure of the Ω− particle is sss.
The Ω− is unstable. It decays into a proton through a series of decays:
Ω− → Ξ0 + π−
followed by
Ξ0 → Λ0 + π0
followed by
Λ0 → p + π−
The Ξ0 and Λ0 are both hadrons.
0 1
. 4 Deduce the quark structure of the Λ0 particle.
[4 marks]
quark structure of Λ0 =
Question 1 continues on the next page
Turn over ►
Please write clearly in block capitals.
Centre number Candidate number
Surname
Forename(s)
Candidate signature
I declare this is my own work.
AS
PHYSICS
Paper 1
Wednesday 17 May 2023 Morning Time allowed: 1 hour 30 minutes
Materials
For Examiner’s Use
For this paper you must have:
a pencil and a ruler Question Mark
a scientific calculator
1
a Data and Formulae Booklet
2
a protractor.
3
Instructions 4
Use black ink or black ball-point pen. 5
Fill in the boxes at the top of this page.
6
Answer all questions.
You must answer the questions in the spaces provided. Do not write TOTAL
outside the box around each page or on blank pages.
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).
Do all rough work in this book. Cross through any work you do not want
to be marked.
Show all your working.
Information
The marks for questions are shown in brackets.
The maximum mark for this paper is 70.
You are expected to use a scientific calculator where appropriate.
A Data and Formulae Booklet is provided as a loose insert.
verified
, 7407/1
verified
, 2
Do not write
outside the
Answer all questions in the spaces provided. box
0 1 interaction between a negative kaon (K−) and a proton (p) produces
A strong
an omega-minus (Ω−) particle, a neutral kaon (K0) and an unidentified particle Y.
The interaction is:
K− + p → Ω− + K0 + Y
Table 1 contains information on the particles in this interaction.
Table 1
K− p Ω− K0 Y
Rest energy / MeV 493.8 938.3 1672 497.8 493.8
Baryon number +1 +1 0
Charge −1e +1e −1e 0
Strangeness −1 0 −3 +1
0 1 .1 Complete Table 1.
[2 marks]
0 1 .2 Calculate, in J, the rest energy of the Ω−.
[2 marks]
rest energy = J
, 3
Do not write
outside the
0 1 . 3 Suggest how energy is conserved in this interaction. box
Refer to the rest energies of the particles in Table 1.
[2 marks]
The quark structure of the Ω− particle is sss.
The Ω− is unstable. It decays into a proton through a series of decays:
Ω− → Ξ0 + π−
followed by
Ξ0 → Λ0 + π0
followed by
Λ0 → p + π−
The Ξ0 and Λ0 are both hadrons.
0 1
. 4 Deduce the quark structure of the Λ0 particle.
[4 marks]
quark structure of Λ0 =
Question 1 continues on the next page
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