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2023 AQA AS PHYSICS 7407/1 Paper 1 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
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2023 AQA AS PHYSICS 7407/1 Paper 1 Question Paper & Mark scheme (Merged) June 2023 [VERIFIED]
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Please write clearly in block capitals. Centre number Candidate number Surname Forename(s) Candidate signature I declare this is my own work. 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 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* 7407/1 IB/M/Jun23/E7 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− 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] 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 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 ► *03* Do not write outside the box IB/M/Jun23/7407/1 4 The products of the decay series include π0 and π− particles. These particles are unstable and decay. 0 1 .5The π0 decays into gamma photons. Each gamma photon has a wavelength of 1.25 × 10−14 m. Calculate the energy of one of these photons. [2 marks] energy of photon = J 0 1 .
6The negative pion π− decays. Which row shows the particles that could be created in this decay? Tick (✓) one box. [1 mark] μ−+νμ e− + ve e − + νe e − + e + + e− *04* IB/M/Jun23/7407/1 Do not write outside the box 13
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