Energy Transfers
Akopọ
Every machine, every organism and every star runs on energy transfers. The physics of where energy sits, how it moves and how much of it ends up doing something useful is one of the most practical topics you will study.
In this lesson you will meet the eight energy stores, the four transfer pathways, the conservation principle, efficiency calculations with Sankey diagrams, and the three mechanisms by which thermal energy spreads - conduction, convection and radiation - together with ways to slow them down.
Awọn Afojusun
- Describe energy transfers involving energy stores: chemical, kinetic, gravitational, elastic, thermal, magnetic, electrostatic, nuclear
- 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 explaining the transfer of energy, including Sankey diagrams
- Describe how thermal energy transfer may take place by conduction, convection and radiation
- Explain the role of convection in everyday phenomena
- Explain how emission and absorption of radiation are related to surface and temperature
- Investigate thermal energy transfer by conduction, convection and radiation
- Explain ways of reducing unwanted energy transfer such as insulation
Akọ̀wé Ẹ̀kọ́
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Ìdánwò Ẹ̀kọ́
Oriire fun ipari ẹkọ lori Energy Transfers. Ni bayi ti o ti ṣawari naa awọn imọran bọtini ati awọn imọran, o to akoko lati fi imọ rẹ si idanwo. Ẹka yii nfunni ni ọpọlọpọ awọn adaṣe awọn ibeere ti a ṣe lati fun oye rẹ lokun ati ṣe iranlọwọ fun ọ lati ṣe iwọn oye ohun elo naa.
Iwọ yoo pade adalu awọn iru ibeere, pẹlu awọn ibeere olumulo pupọ, awọn ibeere idahun kukuru, ati awọn ibeere iwe kikọ. Gbogbo ibeere kọọkan ni a ṣe pẹlu iṣaro lati ṣe ayẹwo awọn ẹya oriṣiriṣi ti imọ rẹ ati awọn ogbon ironu pataki.
Lo ise abala yii gege bi anfaani lati mu oye re lori koko-ọrọ naa lagbara ati lati ṣe idanimọ eyikeyi agbegbe ti o le nilo afikun ikẹkọ. Maṣe jẹ ki awọn italaya eyikeyi ti o ba pade da ọ lójú; dipo, wo wọn gẹgẹ bi awọn anfaani fun idagbasoke ati ilọsiwaju.
- Which of the following is NOT an energy store? A) Chemical B) Electrical C) Kinetic D) Nuclear Answer: B
- A device receives 400 J and outputs 300 J usefully. Its efficiency is: A) 75% B) 133% C) 25% D) 100% Answer: A
- Which thermal transfer mechanism works through a vacuum? A) Conduction B) Convection C) Radiation D) All three Answer: C
- In a Sankey diagram, the width of an arrow represents: A) Speed B) Temperature C) Amount of energy D) Type of store Answer: C
- Cavity wall insulation mainly reduces: A) Radiation through walls B) Convection and conduction in the wall cavity C) Sound transfer D) Light transfer Answer: B
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
O wa lori ohun elo Green Bridge
Gba ohun elo Green Bridge CBT sori foonu tabi kọmputa rẹ lati ri awọn akọsilẹ ẹkọ ni kikun, awọn ibeere adaṣe, ati diẹ sii.
Awọn Iwe Itọsọna Ti a Gba Nimọran
Ṣe Adaṣe Awọn Ibeere Idanwo Adaṣe
Ṣe o fẹ ṣe adaṣe awọn ibeere idanwo adaṣe nipa Energy Transfers? Ṣe igbasilẹ ohun elo Green Bridge CBT lati wọle si awọn ibeere idanwo adaṣe ati awọn ayẹwo adaṣe kikun fun koko-ọrọ yii.
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Gbogbo ohun ti o nilo lati ṣe dara julọ ninu JAMB, WAEC ati NECO.
