(PreU) Physics May/June 2019 paper 2
Insert found on page 5 / 12 pages total, pdf
great mass of the exchange particles. In order to react via the weak force, particles must get very close to each other so that there is a great deal of potential energy in the weak field (think of pushing like charges together). This energy is needed in order to stand any chance of creating a W or a Z0. Adapted from: Advanced Physics, Oxford University Press, Steve Adams and Jonathan
(A/s) Physics May/June 2020 paper 4 variant 1
Question paper found on page 13 / 28 pages total, pdf
great extent, replaced the use of coaxial cables. Advantages of optic fibres include greater bandwidth and very little crosslinking. (i) Suggest an advantage of greater bandwidth. ............................................................................................
(A/s) Design & Technology May/June 2022 paper 3 variant 2
Mark scheme found on page 8 / 16 pages total, pdf
, solar panel variation in force/speed of motion easily achieved Mechanical direct or friction drive maintenance/repair possible Drawbacks could be: Electrical some risk of electrocution very large forces may require cable although great improvement in battery power variation in force/speed of motion easily achieved Mechanical noisy, possibly heavy components limited speed or force generation © UCLES 2022 Page 8 of 16
(A/s) Physics May/June 2020 paper 2 variant 1
Question paper found on page 7 / 16 pages total, pdf
great height above the ground. Air resistance is now significant. (i) On Fig. 2.2, draw arrows to show the directions of the forces acting on the parcel as it falls vertically downwards. Label each arrow with the name of the force. parcel velocity Fig. 2.2 (ii) [2] By considering the forces acting on the parcel, state and explain the variation, if any, of the acceleration
(PreU) Physics May/June 2018 paper 3
Mark scheme found on page 9 / 21 pages total, pdf
great distances / idea of smallest angle that can be measured by a telescope ; 2 marks max.2 5(b)(i)T × 5.1 × 10–7 = 2.90 × 10–3 T = 2.90 × 10–3 / 5.1 × 10–7 = 5690 (K)1 Accept for full marks: 5.0 × 10–7 m and 5800 K 5.2
(A/s) Physics May/June 2020 paper 4 variant 3
Question paper found on page 13 / 28 pages total, pdf
great extent, replaced the use of coaxial cables. Advantages of optic fibres include greater bandwidth and very little crosslinking. (i) Suggest an advantage of greater bandwidth. ............................................................................................
(PreU) Physics May/June 2018 paper 3
Mark scheme found on page 13 / 21 pages total, pdf
great distance ; 8(c)(ii) 8(c)(iii) mass of 38 p = 38.2974: mass of 52 n = 52.4508 total 90.74841 mass defect = 90.7484 – 89.907 = 0.841 u1 (0.841 u = 783 MeV) = 8.70 MeV per nucleon and 2 or 3 s.f.1
(PreU) Physics May/June 2019
Examiner report found on page 7 / 14 pages total, pdf
A brief explanation is often helpful in questions such as this. The answers supplied here varied in quality very considerably. Some candidates drew an appropriate, clearly labelled vector diagram and very swiftly reached the correct answer. Other answers did not include a vector diagram of any sort or included a great deal of complicated trigonometry which did not, in the end, lead to the correct angle being obtained. © 2019
(A/s) Design & Technology Oct/Nov 2020
Examiner report found on page 12 / 24 pages total, pdf
great deal of imagination to communicate graphical information with symbols rather than words. (d)Candidates usually answered this question well. A variety of rendering styles and quality was suggested. However, some candidates did not apply any render at all. There were some outstanding responses, with many having superb three-dimensional drawings. However, some candidates found the 3D shape of the flower basket difficult to draw. In other cases, there
(A/s) Design & Technology Oct/Nov 2020
Examiner report found on page 4 / 24 pages total, pdf
great deal of imagination to communicate graphical information with symbols rather than words. (d)Candidates usually answered this question well. A variety of rendering styles and quality was suggested. However, some candidates did not apply any render at all. There were some outstanding responses, with many having superb three-dimensional drawings. However, some candidates found the 3D shape of the flower basket difficult to draw. In other cases, there
(PreU) Physics May/June 2019 paper 2
Insert found on page 8 / 12 pages total, pdf
Fig. E4.1 shows the Big European Bubble Chamber at CERN. Magnetic field coils are wound around the chamber. The photographs of particle tracks from bubble chambers can be very complex. However, with an understanding of the behaviour of particles in magnetic fields it is possible to learn a great deal from such images. Fig. E4.1 © UCLES 2019 9792/02/INSERT/M/J/19
(PreU) Physics Oct/Nov 2020 paper 1
Question paper found on page 16 / 16 pages total, pdf
great value to astronomers. Its wavelength is 656.28 nm. Which level change gives rise to the hydrogen alpha line? A 2 to 1 B 3 to 1 C 3 to 2 D 5 to 2 39 A star has a radius of 7.00 108 m and an average surface temperature of 6000 C. How much electromagnetic energy is emitted by the star in an hour
(PreU) Physics May/June 2018 paper 3
Mark scheme found on page 18 / 21 pages total, pdf
great uncertainty in momentum therefore it is impossible to have precise values to feed into our theories ; this is a fundamental aspect of nature and not a result of poor measuring equipment ; small uncertainties in present positions / momenta result in larger and larger errors in prediction as time moves forward ; the best theory for predicting the future is quantum theory but this is an indeterministic / probabilistic theory ; 3 marks
(PreU) Physics May/June 2019 paper 2
Insert found on page 2 / 12 pages total, pdf
great for the strong force to overcome. Fig. E1.1 shows the relationship between the strong force and proton separation. for all r > ro the coulomb force dominates repulsion short range repulsion 1 coulomb force ∝ 2 r ro proton separation strong attraction balances coulomb repulsion at r ∼ 10–15 m attraction strong nuclear force increases rapidly at short range Fig. E1.1 The way the strong force varies
(A/s) Design & Technology Oct/Nov 2019
Examiner report found on page 4 / 26 pages total, pdf
great deal. Occasionally candidates simply made changes to the scoop that had no relevance to improving comfort for the user. Question 2 (a) (i) (ii) (b) Most candidates were able to name a suitable glue with Pritt and PVA often given as answers. Candidates demonstrated good knowledge of sheet materials with foamboard and corriflute often given as answers. There were many good answers with some excellent three-dimensional views.
(PreU) Physics May/June 2022
Examiner report found on page 12 / 15 pages total, pdf
great difficulty to candidates. Question 13 The calculations in part (a) were done well by a wide range of candidates. Deciding on whether the route was the shortest route was done surprisingly well considering candidates had to think out a method for themselves. In part (b), though candidates had just been asked about the two lines predicted by Newton’s model, they failed to mention explicitly that multiple fringes would
(A/s) Design & Technology May/June 2023
Examiner report found on page 11 / 11 pages total, pdf
great care and showed enthusiasm in the making of their design outcomes in terms of construction methods and finishing techniques. Many well-developed practical skills were applied. The use of Computer Aided Manufacturing (CAM), often using a laser cutter or 3D printer, was commonly seen but traditional construction methods were also evident in many folders. Centres are reminded of the need to include clear and detailed photographic evidence of made products
(PreU) Physics May/June 2018
Examiner report found on page 14 / 16 pages total, pdf
great care in the administration of the moderation process. For the future, when submitting the sample, centres are asked to ensure that the candidate’s number is also included on each investigation. Centres are reminded that a ‘best-fit’ approach should be used when applying the criteria to an individual candidate’s plan and report. It was pleasing to see that the ‘0’ mark was being awarded appropriately in some cases
(A/s) Design & Technology May/June 2022
Examiner report found on page 7 / 12 pages total, pdf
great deal of time describing marking out procedures and often omitted key constructional detail. The analysis of the given situation for questions in Section B was often generic and could refer to most design situations. Candidates must focus on the specific problem to achieve marks for this part. General comments Candidates used sketches well to describe the stages of particular processes and to support their answers to questions in Section A. Questions requiring
(A/s) Design & Technology Oct/Nov 2019
Examiner report found on page 16 / 26 pages total, pdf
great disadvantage. General comments There were many outstanding scripts this year with full and detailed responses to Section A and excellent design skills demonstrated in Section B. Whilst many candidates followed the rubric correctly, time management continues to be an issue for some. Some candidates spent far too long on Section B, making very brief and limited attempts to questions in Section A. A significant number of candidates did not complete all
(PreU) Physics May/June 2016
Examiner report found on page 3 / 11 pages total, pdf
great deal of space on a paper like this and candidates are advised to make use of this so that diagrams are clearer and answer well set out. A crossing out followed by a new version of the answer is usually better and clearer than an attempt to modify what has already been written or than an answer written in between crossed out previous answers. This helps a candidate to see what has been
(PreU) Physics May/June 2023
Examiner report found on page 10 / 13 pages total, pdf
great confidence, but some stopped halfway through and only gave the energy per uranium nucleus. Most candidates would gain marks and save time if they set out a 4-mark calculation in an organised fashion. Question 7 Half the candidates could draw the Balmer lines though more recognised the 3 to 2 change. Part (b) was done well by most. SECTION 2 Most candidates chose at least two of Questions 8,
(PreU) Physics May/June 2017
Examiner report found on page 10 / 12 pages total, pdf
great care in the administration of the moderation process. For the future, when submitting the sample, Centres are asked to ensure that the candidate’s number is also included on each investigation. Centres are reminded that a ‘best-fit’ approach should be used when applying the criteria to an individual candidate’s plan and report. It was pleasing to see that the ‘0’ mark was being awarded appropriately in some cases
(PreU) Physics May/June 2019
Examiner report found on page 12 / 14 pages total, pdf
great care in the administration of the moderation process. For the future, when submitting the sample, centres are asked to ensure that the candidate’s number is also included on each investigation and only one copy of the investigation for each candidate in the sample needs to be submitted. Centres are reminded that a ‘best-fit’ approach should be used when applying the criteria to an individual candidate’s plan and report.
(A/s) Physics Feb/March 2024
Examiner report found on page 6 / 20 pages total, pdf
great many candidates were guessing. (c)Stronger candidates found this straightforward and presented clear solutions. Some candidates confused the electromagnetic wave’s period with its wavelength. Others thought that the time-base setting was equal to the period. Many candidates were unable to correctly determine the period from the time base setting and the diagram. Power-of-ten errors and transcription errors were particularly common. Occasionally, the value of the frequency