[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"detail-sidebar-cat-0-en-105":3,"doc-seo-657159-105":59,"doc-detail-657159-en":130},{"code":4,"msg":5,"data":6},0,"success",[7,13,18,23,28,33,38,43,48,51,55],{"id":8,"doc_module":4,"doc_module_name":9,"category_name":10,"show_sort_weight":11,"slug":12},1,"Document","Story & Novel",90,"story-novel",{"id":14,"doc_module":4,"doc_module_name":9,"category_name":15,"show_sort_weight":16,"slug":17},2,"Literature",80,"literature",{"id":19,"doc_module":4,"doc_module_name":9,"category_name":20,"show_sort_weight":21,"slug":22},4,"Exam",70,"exam",{"id":24,"doc_module":4,"doc_module_name":9,"category_name":25,"show_sort_weight":26,"slug":27},5,"Comic",60,"comic",{"id":29,"doc_module":4,"doc_module_name":9,"category_name":30,"show_sort_weight":31,"slug":32},6,"Technology",50,"technology",{"id":34,"doc_module":4,"doc_module_name":9,"category_name":35,"show_sort_weight":36,"slug":37},7,"Healthcare",40,"healthcare",{"id":39,"doc_module":4,"doc_module_name":9,"category_name":40,"show_sort_weight":41,"slug":42},8,"Research & Report",30,"research-report",{"id":44,"doc_module":4,"doc_module_name":9,"category_name":45,"show_sort_weight":46,"slug":47},9,"Religion & Spirituality",20,"religion-spirituality",{"id":46,"doc_module":4,"doc_module_name":9,"category_name":49,"show_sort_weight":46,"slug":50},"World Cup","world-cup",{"id":52,"doc_module":4,"doc_module_name":9,"category_name":53,"show_sort_weight":52,"slug":54},10,"Lifestyle","lifestyle",{"id":56,"doc_module":4,"doc_module_name":9,"category_name":57,"show_sort_weight":24,"slug":58},19,"General","general",{"code":4,"msg":60,"data":61},"ok",{"site_id":62,"language":63,"slug":64,"title":65,"keywords":66,"description":67,"schema_data":68,"social_meta":123,"head_meta":125,"extra_data":127,"updated_unix":129},105,"en","sankey-diagrams-energy-transfers-and-conservation","Sankey Diagrams - Energy Transfers and Conservation","","Sankey diagrams summarise energy transfers in a process by using arrow thickness to represent the relative amount of energy flowing between forms. The materials explain conservation of energy and apply it to examples such as an electric filament lamp, comparing useful light energy with wasted heat energy. Classwork tasks require labeling inputs and outputs and drawing Sankey diagrams for filament bulbs, energy-efficient bulbs, and test cars, including calculating wasted energy across useful and waste categories.",{"@graph":69,"@context":122},[70,84,105],{"@type":71,"itemListElement":72},"BreadcrumbList",[73,77,79,82],{"item":74,"name":75,"@type":76,"position":8},"https://docshare.wps.com","Home","ListItem",{"item":78,"name":9,"@type":76,"position":14},"https://docshare.wps.com/document/",{"item":80,"name":20,"@type":76,"position":81},"https://docshare.wps.com/document/exam/",3,{"item":83,"name":65,"@type":76,"position":19},"https://docshare.wps.com/document/sankey-diagrams-energy-transfers-and-conservation/657159/",{"url":83,"name":65,"@type":85,"image":86,"author":91,"headline":65,"publisher":94,"fileFormat":97,"inLanguage":63,"description":67,"dateModified":98,"datePublished":99,"encodingFormat":97,"isAccessibleForFree":100,"interactionStatistic":101},"DigitalDocument",{"url":87,"@type":88,"width":89,"height":90},"https://docshare.wps.com/thumbnails/sankey-diagrams-energy-transfers-and-conservation/657159.png","ImageObject",300,407,{"name":92,"@type":93},"Eliana","Person",{"url":74,"name":95,"@type":96},"DocShare","Organization","application/pdf","2026-10-30","2026-10-26",true,{"@type":102,"interactionType":103,"userInteractionCount":24},"InteractionCounter",{"@type":104},"ViewAction",{"@type":106,"mainEntity":107},"FAQPage",[108,114,118],{"name":109,"@type":110,"acceptedAnswer":111},"How does a Sankey diagram show the amount of energy transferred?","Question",{"text":112,"@type":113},"The thickness of the line or arrow shows the greater amount of energy transferred.","Answer",{"name":115,"@type":110,"acceptedAnswer":116},"What does the principle of conservation of energy mean in this context?",{"text":117,"@type":113},"Energy can change form, but the total energy supplied to a process does not change; it is redistributed among useful and wasted outputs.",{"name":119,"@type":110,"acceptedAnswer":120},"What labels are required when drawing a Sankey diagram for the tasks?",{"text":121,"@type":113},"The diagram must be labeled with INPUT ENERGY, USEFUL OUTPUT ENERGY, and WASTED OUTPUT ENERGY.","https://schema.org",{"og:url":83,"og:type":124,"og:title":65,"og:site_name":95,"og:description":67},"article",{"robots":126,"canonical":83},"index,follow",{"doc_id":128,"site_id":62},657159,1793091239,{"code":4,"msg":5,"data":131},{"doc_id":128,"user_id":132,"nickname":92,"user_avatar":133,"doc_module":4,"category_id":19,"category_name":20,"doc_title":65,"doc_description":67,"doc_content":134,"file_id":135,"file_url":136,"file_type":137,"file_size":138,"view_count":24,"is_deleted":4,"is_public":8,"is_downloadable":8,"audit_status":8,"page_count":81,"language":139,"language_code":63,"site_id":62,"html_lang":63,"table_of_contents":140,"faqs":141,"seo_title":142,"seo_description":67,"update_tm":143,"read_time":39},4398048949847,"https://ap-avatar.wpscdn.com/avatar/400002536579ef2da7f?_k=1778318612642679267","What is a Sankey diagram?  \nSankey diagrams summarise all the energy transfers taking place in a process.  \nThe thicker the line or arrow, the greater the amount of energy involved.  \nSankey diagrams can be drawn on graph paper to show the relative values of total, useful and wasted energy.  \nThis Sankey diagram for an electric filament lamp shows that most of the electrical energy is transferred as heat energy rather than light energy.  \nThe Principle of Conservation of Energy  \nKey fact-Energy can be changed from one form to another but cannot be created or destroyed. The total amount of energy does not change.  \nIn the above Sankey diagram, note that 100 J of electrical energy is supplied to the lamp.  \nOf this, 10 J is transferred to the surroundings as useful light energy.  \nThe remainder, 90 J (100 J – 10 J) is transferred to the surroundings as wasted heat energy.  \nThe energy transfer to light energy is the useful transfer. The rest is ‘wasted’.  \nIt is eventually transferred to the surroundings, making them warmer. This ‘wasted’ energy eventually becomes so spread out that it becomes very difficult to do anything useful with it.  \nClasswork  \nA Sankey diagram shows you how well a machine uses energy. In other words, it tells you if it uses it efficiently (without much waste) or inefficiently (with a lot of waste) .  \nThe thickness of the arrows shows how much energy is involved. (The length of the arrows does not matter in a Sankey Diagram. ) Useful energy transfers are shown going left to right. Wasteful energy transfers are shown going upwards.  \n1. Write in these labels on the diagram above:  \na. INPUT ENERGY  \nb. USEFUL OUTPUT ENERGY  \nc. WASTED OUTPUT ENERGY  \n2. A normal filament bulb transfers 10% of energy as light (useful) but 90% as heat energy (wasted) . Draw a Sankey diagram in the space below.  \nRemember to label it with: INPUT ENERGY, USEFUL OUTPUT ENERGY, WASTED OUTPUT ENERGY  \n3. An energy efficient bulb transfers 40% of the energy as useful light energy.  \na. How much energy is transferred as heat?  \nb. Draw a Sankey Diagram in the space below  \nRemember to label it with: INPUT ENERGY, USEFUL OUTPUT ENERGY, WASTED OUTPUT ENERGY  \n4. A team of scientists test an “old banger” car. They find out that only 10% of the energy is transferred as kinetic energy (useful) and 70% is transferred as heat energy (wasted) .  \na. How much energy is wasted as sound?  \nb. Draw a Sankey Diagram in the space below  \nLabel the arrows with input energy, useful output energy (kinetic), wasted output energy (heat), wasted output energy (sound)  \n5. A team of scientists test a brand new hybrid car. They find out that 40% of the energy is transferred as kinetic energy (useful) and 55% is transferred as heat energy (wasted) .  \na. How much energy is wasted as sound?  \nb. Draw a Sankey Diagram in the space below  \nRemember to label each of the arrows!!!","cbCaibcYleLdDsQ8","https://ap.wps.com/l/cbCaibcYleLdDsQ8","pdf",265690,"English","# What is a Sankey diagram?\n## Energy transfer and conservation of energy\n## Classwork questions","[{\"question\":\"How does a Sankey diagram show the amount of energy transferred?\",\"answer\":\"The thickness of the line or arrow shows the greater amount of energy transferred.\"},{\"question\":\"What does the principle of conservation of energy mean in this context?\",\"answer\":\"Energy can change form, but the total energy supplied to a process does not change; it is redistributed among useful and wasted outputs.\"},{\"question\":\"What labels are required when drawing a Sankey diagram for the tasks?\",\"answer\":\"The diagram must be labeled with INPUT ENERGY, USEFUL OUTPUT ENERGY, and WASTED OUTPUT ENERGY.\"}]","Sankey Diagrams - Energy Transfers and Conservation | PDF",1792974953]