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It also includes calculations using given data such as specific heat capacity and energy required to heat metal, and questions on an electric motor powering a lift, covering useful output, wasted energy, and relationships shown by an input-energy 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--- |\n| Surname |  |  |  |  |  |  |  |  |  |  |\n| Other Names |  |  |  |  |  |  |  |  |  |  |\n| Candidate Signature |  |  |  |  |  |  |  |  |  |  |\n\nGeneral Certificate of Secondary Education Higher Tier  \nJune 2012  \nScience A Unit Physics P1  \nPhysics Unit Physics P1  \nWednesday 20 June 2012 9.00 am to 10.00 am  \nFor this paper you must have:  \n􀁺 a ruler  \n􀁺 the Physics Equations Sheet (enclosed) . You may use a calculator.  \nTime allowed  \n􀁺 1 hour  \nPH1HP  \nH  \nInstructions  \n􀁺 Use black ink or black ball-point pen.  \n􀁺 Fill in the boxes at the top of this page.  \n􀁺 Answer all questions.  \n􀁺 You must answer the questions in the spaces provided. Do not write outside the box around each page or on blank pages.  \n􀁺 Do all rough work in this book. Cross through any work you do not want to be marked.  \nInformation  \n􀁺 The marks for questions are shown in brackets.  \n􀁺 The maximum mark for this paper is 60.  \n􀁺 You are expected to use a calculator where appropriate.  \n􀁺 You are reminded of the need for good English and clear presentation in your answers.  \n􀁺 Question 3(b) should be answered in continuous prose. In this question you will be marked on your ability to:  \n– use good English  \n– organise information clearly  \n– use specialist vocabulary where appropriate.  \nAdvice  \n􀁺 In all calculations, show clearly how you work out your answer.  \n\n| For Examiner’s Use |  |\n| --- | --- |\n| Examiner’s Initials |  |\n| Question | Mark |\n| 1 |  |\n| 2 |  |\n| 3 |  |\n| 4 |  |\n| 5 |  |\n| 6 |  |\n| 7 |  |\n| 8 |  |\n| TOTAL |  |\n\n(JUn12PH1Hp01)  \nG/K83986 6/6/6/6  \nPH1HP  \n2 Do not write  \noutside the box  \n\n| Answer all questions in the spaces provided. |\n| --- |\n| 1 A wood burning stove is used to heat a room.\u003Cbr>\u003Cbr>The fire in the stove uses wood as a fuel. The fire heats the matt black metal case of the stove.\u003Cbr>1 (a) The air next to the stove is warmed by infrared radiation.\u003Cbr>How does the design of the stove help to improve the rate of energy transfer by infrared radiation?\u003Cbr>\u003Cbr>(2 marks) |\n\n(02) G/K83986/Jun12/PH1HP  \n3 Dooutwextrih  \n1 (b) Burning 1 kg of wood transfers 15 MJ of energy to the stove. The stove then transfers  \n13.5 MJ of energy to the room.  \nCalculate the efficiency of the stove.  \nUse the correct equation from the Physics Equations Sheet.  \nShow clearly how you work out your answer.  \n\n|  |\n| --- |\n|  |\n\nEfficiency = ........................................  \n(2 marks)  \n1 (c) Some of the energy from the burning wood is wasted as the hot gases leave the chimney and warm the air outside the house.  \nName one other way energy is wasted by the stove.  \n(1 mark)  \n1 (d) Some people heat their homes using electric heaters. Other people heat their homes using a wood burning stove.  \nGive two environmental advantages of using a wood burning stove to heat a home rather than heaters that use electricity generated from fossil fuels.  \n1 .........................................................................................................................................  \n............................................................................................................................................  \n2 .........................................................................................................................................  \n............................................................................................................................................  \n(2 marks)  \nQuestion 1 continues on the next page  \nTurn over 􀀸  \n(03) G/K83986/Jun12/PH1HP  \n4 Do not write  \noutside the box  \n1 (e) The metal case of the stove gets hot when the fire is lit. Here is some information about the stove.  \nMass of metal case  \nStarting temperature of metal case Final temperature of metal case Specific heat capacity of metal case  \n100 kg  \n20 °C  \n70 °C  \n510 J/kg °C  \nCalculate","cbCaimxrighpqbOl","https://ap.wps.com/l/cbCaimxrighpqbOl","pdf",1552940,"English","# Question 1\n## (a) Infrared radiation and stove design\n## (b) Stove efficiency calculation\n## (c) Other wasted energy and energy loss\n## (d) Environmental advantages of wood burning vs electricity\n## (e) Heating a metal case using specific heat capacity\n# Question 2\n## (a)(i) Useful energy output from an electric motor\n## (a)(ii) Fate of wasted energy\n## (b) Conclusion from input-energy vs load graph\n## (c) Escalator motor power and energy-saving context","[{\"question\":\"What is the total available time and maximum mark for this paper?\",\"answer\":\"The paper allows 1 hour and has a maximum mark of 60.\"},{\"question\":\"How is the stove efficiency asked to be calculated?\",\"answer\":\"It provides the energy transferred to the stove and the energy transferred to the room, then requires using the correct equation from the Physics Equations Sheet and showing working.\"},{\"question\":\"What topics does Question 2 cover about an electric motor?\",\"answer\":\"It asks for the useful energy output, where wasted energy eventually goes, what can be concluded from a graph of input energy vs load, and includes a scenario about escalators being turned off to save energy.\"}]","General Certificate of Secondary Education Higher Tier - Science A Unit Physics P1 - Physics Unit Physics P1 | PDF"]