2023 AQA AS PHYSICS 7407/1 Paper 1 Question Paper & Mark scheme (Merged) June
2023 [VERIFIED]
AS
PHYSICS
Paper 1
Wednesday 17 May 2023 Morning Time
... [Show More] allowed: 1 hour 30 minutes
Materials
For this paper you must have:
• a pencil and a ruler
• a scientific calculator
• a Data and Formulae Booklet
• a protractor.
Instructions
• Use black ink or black ball-point pen.
• Fill in the boxes at the top of this page.
• Answer all questions.
• You must answer the questions in the spaces provided. Do not
write 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.
For Examiner’s Use
Question Mark
1
2
3
4
5
6
TOTAL
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.
*JUN237407101*
IB/M/Jun23/E7 7407/1
2
Answer all questions in the spaces provided.
0 1 A strong interaction between a negative kaon (K
−
) and a proton (p)
produces − 0
The interaction is:
K
−
+ p → Ω−
+ K0
+ Y
Table 1 contains information on the particles in this interaction.
Table 1
K
−
p Ω
− K
0
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]
Calculate, in J, the rest energy of the Ω
−
0 1 2 .
[2 marks]
rest energy = J
Do not write
outside the
box
*02*
IB/M/Jun23/7407/1
3
0 1 . 3 Suggest how energy is conserved in this interaction.
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
Ξ
0→Λ0
+π
0
followed by
Λ
0
→ p + π
−
The Ξ
0
and Λ
0
are both hadrons.
0 1
.
4 Deduce the quark structure of the Λ
0
particle.
[4 marks]
quark structure of Λ
0
=
Question 1 continues on the next page
Turn over ►
*03*
Do not write
outside the
box
IB/M/Jun23/7407/1
4
The products of the decay series include π
0
and π
−
particles. These particles
are unstable and decay.
0 1
.
5The π
0
decays into gamma photons. Each gamma photon [Show Less]