Energy Transfers
Bayani Gaba-gaba
Switch on an old filament lamp and about nine tenths of the electricity you are paying for ends up warming the ceiling. The energy did not vanish and it was not destroyed; it simply went somewhere you did not want it. Tracking where energy goes is one of the most powerful habits in physics.
This lesson names the eight stores energy can sit in and the four pathways it travels by, states the principle of conservation of energy, and shows you how to calculate an efficiency and read the whole story of a device off a single Sankey diagram.
Manufura
- Describe energy transfers involving energy stores (chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic, nuclear) and energy transfers (mechanically, electrically, by heating, by radiation)
- Use the principle of conservation of energy
- Know and use the relationship between efficiency, useful energy output and total energy output
- Describe a variety of everyday and scientific devices and situations, explaining the transfer of the input energy, including their representation by Sankey diagrams
Taswirar tunani
An zana wannan batu don ka ga yadda ra'ayoyi ke hadewa.
Bude taswirar tunani a cikin manhaja
Katunan tunawa
Gwaji mai sauri kan abin da ake jarraba a wannan batu.
Yi atisayen wadannan katuna a cikin manhaja
Takardar Darasi
Cikakken Bayanin Darasi Yana Kan Manhajar Green Bridge
Sami manhajar Green Bridge CBT a wayarka ko kwamfutarka domin cikakken laburaren IGCSE: takardun jarrabawar baya, tsarin kimantawa, taswirar tunani, katunan karatu da darussan sauti.
Nazarin Darasi
Barka da kammala darasi akan Energy Transfers. Yanzu da kuka bincika mahimman ra'ayoyi da ra'ayoyi, lokaci yayi da zaku gwada ilimin ku. Wannan sashe yana ba da ayyuka iri-iri Tambayoyin da aka tsara don ƙarfafa fahimtar ku da kuma taimaka muku auna fahimtar ku game da kayan.
Za ka gamu da haɗe-haɗen nau'ikan tambayoyi, ciki har da tambayoyin zaɓi da yawa, tambayoyin gajeren amsa, da tambayoyin rubutu. Kowace tambaya an ƙirƙira ta da kyau don auna fannoni daban-daban na iliminka da ƙwarewar tunani mai zurfi.
Yi wannan ɓangaren na kimantawa a matsayin wata dama don ƙarfafa fahimtarka kan batun kuma don gano duk wani yanki da kake buƙatar ƙarin karatu. Kada ka yanke ƙauna da duk wani ƙalubale da ka fuskanta; maimakon haka, ka kallesu a matsayin damar haɓaka da ingantawa.
- Which of the following is an energy store, not a pathway? A) Electrical B) Heating C) Elastic D) Radiation Answer: C
- A device takes in 250 J and produces 50 J of useful output. Its efficiency is: A) 5% B) 20% C) 50% D) 200% Answer: B
- The principle of conservation of energy states that energy: A) is always destroyed by friction B) cannot be created or destroyed, only transferred C) can be created in a power station D) is used up when a device is switched on Answer: B
- In a Sankey diagram, the width of each arrow represents: A) the time taken B) the temperature C) the amount of energy D) the efficiency Answer: C
- Energy stored in a stretched elastic band is in the: A) chemical store B) elastic store C) thermal store D) nuclear store Answer: B
Yi aikin wadannan tambayoyi a cikin manhaja
Yi aikin wadannan tambayoyi a cikin manhaja
Littattafan da ake ba da shawarar karantawa
Ƙarin koyo daga tushe na buɗe
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Sashen littafi
Mechanical Energy and Conservation of Energy
Explain the law of conservation of energy in terms of kinetic and potential energy
"Physics: Mechanical Energy and Conservation of Energy" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/9-2-mechanical-energy-and-conservation-of-energy. Access for free at https://openstax.org/books/physics/pages/1-introduction
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Sashen littafi
Simple Machines
Describe simple and complex machines
"Physics: Simple Machines" by OpenStax, OpenStax, Rice University, licensed under CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Source: https://openstax.org/books/physics/pages/9-3-simple-machines. Access for free at https://openstax.org/books/physics/pages/1-introduction
Wasu ƙungiyoyi ne suka wallafa su ƙarƙashin lasisin buɗe, kuma muna ambaton su yadda suka nema. Hanyoyin suna buɗe shafukansu.
Yi Aikin Tambayoyin Gwaji
Kana son yin aikin tambayoyin gwaji kan Energy Transfers? Sauke manhajar Green Bridge CBT don samun tambayoyin gwaji da cikakkun jarrabawa akan wannan batu.
Sauke Manhajar Daga Google Playstore
Duk abin da kake buƙata don yin fice a JAMB, WAEC & NECO.
