[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"doc-detail-207893-en":3,"doc-seo-207893-105":30,"detail-sidebar-cat-0-en-105":83},{"code":4,"msg":5,"data":6},0,"success",{"doc_id":7,"user_id":8,"nickname":9,"user_avatar":10,"doc_module":4,"category_id":11,"category_name":12,"doc_title":13,"doc_description":14,"doc_content":15,"file_id":16,"file_url":17,"file_type":18,"file_size":19,"view_count":20,"is_deleted":4,"is_public":20,"is_downloadable":20,"audit_status":20,"page_count":21,"language":22,"language_code":23,"site_id":24,"html_lang":23,"table_of_contents":25,"faqs":26,"seo_title":27,"seo_description":14,"update_tm":28,"read_time":29},207893,1374402739827,"Nguyễn Văn Học","https://ap-avatar.wpscdn.com/avatar/14000c97e7351f1a627?x-image-process=image/resize,m_fixed,w_180,h_180&k=1787885694763230660",4,"Exam","Question 6 - Hot Coffee Wheel Pressure and Temperature Calculations","Question 6 focuses on a device that uses a mug of hot coffee to heat air in a chamber and drive a wheel. The questions require explaining how chamber pressure changes when air temperature rises, why the chamber base is metal for rapid heating, and which air property links small internal-energy changes to large temperature changes. It also asks how to increase wheel speed and includes a calculation to find the coffee’s final temperature from given energy loss and thermal data.","0  6  Figure 12 shows a device that uses a mug of hot coffee to turn a wheel.  \nFigure 12  \n0  6  .  1 The hot coffee increases the temperature of the air in the chamber.  \nExplain how the pressure in the chamber changes.  \n[3 marks]  \n\n|  |\n| --- |\n|  |\n|  |\n|  |\n|  |\n\nQuestion 6 continues on the next page  \noutside the box  \n0  6  .  2  For the device to work , the air in the chamber must increase in temperature quickly.  \nExplain why the bottom of the air chamber is made of metal rather than plastic.  \n[2 marks]  \n\n|  |\n| --- |\n|  |\n|  |\n\n 0  6  .  3 The mass of air in the chamber is constant.  \nWhat property of air allows a small change in internal energy to cause a large temperature change to the air in the chamber?  \n[1 mark]  \n0  6  .  4  The changes in pressure in the air chamber cause the wheel to turn.  \nSuggest one way to increase the speed at which the wheel turns.  \n[1 mark]  \nbox  \n\n|  |  |  |  |  | The temperature of the coffee decreases as the device is used. | Do not\u003Cbr>outside box |\n| --- | --- | --- | --- | --- | --- | --- |\n|  | 0 | 6 | . | 5 |  |  |\n| The initial temperature of the coffee was 76 °C.\u003Cbr>The internal energy of the coffee decreased by 15 kJ.\u003Cbr>density of coffee = 1.1 × 103 kg/m3 volume of coffee = 1.9 × 10–4 m3\u003Cbr>specific heat capacity of coffee = 4200 J/kg °C\u003Cbr>Calculate the final temperature of the coffee.\u003Cbr>Use the Physics Equations Sheet.\u003Cbr>[6 marks]\u003Cbr>\u003Cbr>Final temperature of the coffee =   °C\u003Cbr>END OF QUESTIONS |  |  |  |  |  |  |\n|  |  |  |  |  |  |  |\n|  |  |  |  |  |  | 13 |\n\nwrite the  \nQuestion 6  \n\n| Question | Answers | Extra information | Mark | AO /\u003Cbr>Spec. Ref. |\n| --- | --- | --- | --- | --- |\n| 06.1 | (air) particles move faster\u003Cbr>or\u003Cbr>(air) particles have increased kinetic energy\u003Cbr>(so air) particles collide more frequently with the wall / chamber\u003Cbr>or\u003Cbr>(so air) particles collide with more force with the wall / chamber\u003Cbr>(so) the pressure increases | dependent on MP1 or MP2 | 1\u003Cbr>1\u003Cbr>1 | AO1\u003Cbr>6.3.3.1 |\n\n\n| Question | Answers | Extra information | Mark | AO /\u003Cbr>Spec. Ref. |\n| --- | --- | --- | --- | --- |\n| 06.2 | (metals) have a high(er) thermal conductivity\u003Cbr>which allows a greater rate of (thermal) energy transfer | allow metals are good/better (thermal) conductors\u003Cbr>allow (thermal) energy is transferred more quickly | 1\u003Cbr>1 | AO1\u003Cbr>6.1.2.1 |\n\n\n| Question | Answers | Extra information | Mark | AO /\u003Cbr>Spec. Ref. |\n| --- | --- | --- | --- | --- |\n| 06.3 | (a low) specific heat capacity |  | 1 | AO1\u003Cbr>6.1.1.3\u003Cbr>6.3.2.2 |\n\n\n| Question | Answers | Extra information | Mark | AO /\u003Cbr>Spec. Ref. |\n| --- | --- | --- | --- | --- |\n| 06.4 | any one from:\u003Cbr>• lubrication\u003Cbr>• use hotter coffee\u003Cbr>• decrease the temperature of the surroundings | allow oil the device/wheel | 1 | AO3\u003Cbr>6.1.2.1 |\n\n\n| Question | Answers | Extra information | Mark | AO /\u003Cbr>Spec. Ref. |\n| --- | --- | --- | --- | --- |\n| 06.5 | 1.1 × 103 = 1.m9ss10−4 mass = 0.209 (kg)\u003Cbr>15 000 = 0.209 × 4200 × Δθ\u003Cbr>Δθ = 0.21509~~ ~~004200\u003Cbr>Δθ = 17(.088   )\u003Cbr>final temperature\u003Cbr>(= 76 – 17.088) = 59 (°C) | allow m = 1.9 × 10-4 × 1.1 × 103\u003Cbr>the equation density = vmassolume must have been used to score subsequent marks\u003Cbr>allow a correct substitution using their calculated value of mass\u003Cbr>allow a correct re-arrangement using their value of mass and/or an incorrectly / not converted energy value\u003Cbr>allow a correct calculation using their value of mass and / or an incorrectly / not converted energy value\u003Cbr>allow 58.9   (°C)\u003Cbr>allow an answer consistent with their value of mass and / or an incorrectly / not converted energy value | 1\u003Cbr>1\u003Cbr>1\u003Cbr>1\u003Cbr>1\u003Cbr>1 | AO2\u003Cbr>6.1.1.3\u003Cbr>6.3.2.2\u003Cbr>6.3.1.1 |\n\n\n| Total Question 6 | 13 |\n| --- | --- |","cbCaib5OSRYhjQUI","https://ap.wps.com/l/cbCaib5OSRYhjQUI","pdf",1024836,1,5,"English","en",105,"# Question 6\n## Explain pressure change in the chamber\n## Explain why the chamber base is metal\n## Identify an air property linking internal energy to temperature change\n## Suggest how to increase wheel speed\n## Calculate the final temperature of the coffee","[{\"question\":\"How do you calculate the final temperature of the coffee after its internal energy decreases?\",\"answer\":\"Use the given values for initial temperature, mass (from density and volume), specific heat capacity, and the energy decrease. Apply Q = mcΔθ to find Δθ, then use final temperature = initial temperature − Δθ, giving about 59 °C (or a value consistent with the candidate’s calculated mass/Δθ).\"}]","Question 6 - Hot Coffee Wheel Pressure and Temperature Calculations | PDF",1788601616,13,{"code":4,"msg":31,"data":32},"ok",{"site_id":24,"language":23,"slug":33,"title":13,"keywords":34,"description":14,"schema_data":35,"social_meta":78,"head_meta":80,"extra_data":82,"updated_unix":28},"question-6-hot-coffee-wheel-pressure-and-temperature-calculations","",{"@graph":36,"@context":77},[37,53,68],{"@type":38,"itemListElement":39},"BreadcrumbList",[40,44,48,51],{"item":41,"name":42,"@type":43,"position":20},"https://docshare.wps.com","Home","ListItem",{"item":45,"name":46,"@type":43,"position":47},"https://docshare.wps.com/document/","Document",2,{"item":49,"name":12,"@type":43,"position":50},"https://docshare.wps.com/document/exam/",3,{"item":52,"name":13,"@type":43,"position":11},"https://docshare.wps.com/document/question-6-hot-coffee-wheel-pressure-and-temperature-calculations/207893/",{"url":52,"name":13,"@type":54,"author":55,"headline":13,"publisher":57,"fileFormat":60,"inLanguage":23,"description":14,"dateModified":61,"datePublished":62,"encodingFormat":60,"isAccessibleForFree":63,"interactionStatistic":64},"DigitalDocument",{"name":9,"@type":56},"Person",{"url":41,"name":58,"@type":59},"DocShare","Organization","application/pdf","2026-09-06","2026-09-05",true,{"@type":65,"interactionType":66,"userInteractionCount":20},"InteractionCounter",{"@type":67},"ViewAction",{"@type":69,"mainEntity":70},"FAQPage",[71],{"name":72,"@type":73,"acceptedAnswer":74},"How do you calculate the final temperature of the coffee after its internal energy decreases?","Question",{"text":75,"@type":76},"Use the given values for initial temperature, mass (from density and volume), specific heat capacity, and the energy decrease. Apply Q = mcΔθ to find Δθ, then use final temperature = initial temperature − Δθ, giving about 59 °C (or a value consistent with the candidate’s calculated mass/Δθ).","Answer","https://schema.org",{"og:url":52,"og:type":79,"og:title":13,"og:site_name":58,"og:description":14},"article",{"robots":81,"canonical":52},"index,follow",{"doc_id":7,"site_id":24},{"code":4,"msg":5,"data":84},[85,89,93,96,100,105,110,115,120,123,127],{"id":20,"doc_module":4,"doc_module_name":46,"category_name":86,"show_sort_weight":87,"slug":88},"Story & Novel",90,"story-novel",{"id":47,"doc_module":4,"doc_module_name":46,"category_name":90,"show_sort_weight":91,"slug":92},"Literature",80,"literature",{"id":11,"doc_module":4,"doc_module_name":46,"category_name":12,"show_sort_weight":94,"slug":95},70,"exam",{"id":21,"doc_module":4,"doc_module_name":46,"category_name":97,"show_sort_weight":98,"slug":99},"Comic",60,"comic",{"id":101,"doc_module":4,"doc_module_name":46,"category_name":102,"show_sort_weight":103,"slug":104},6,"Technology",50,"technology",{"id":106,"doc_module":4,"doc_module_name":46,"category_name":107,"show_sort_weight":108,"slug":109},7,"Healthcare",40,"healthcare",{"id":111,"doc_module":4,"doc_module_name":46,"category_name":112,"show_sort_weight":113,"slug":114},8,"Research & Report",30,"research-report",{"id":116,"doc_module":4,"doc_module_name":46,"category_name":117,"show_sort_weight":118,"slug":119},9,"Religion & Spirituality",20,"religion-spirituality",{"id":118,"doc_module":4,"doc_module_name":46,"category_name":121,"show_sort_weight":118,"slug":122},"World Cup","world-cup",{"id":124,"doc_module":4,"doc_module_name":46,"category_name":125,"show_sort_weight":124,"slug":126},10,"Lifestyle","lifestyle",{"id":128,"doc_module":4,"doc_module_name":46,"category_name":129,"show_sort_weight":21,"slug":130},19,"General","general"]