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Energy Stores and transfers

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Hot wheels Track

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Kinetic to Thermal energy transfer

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Marble Roller Coaster

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A fully working water mill at @DunsterCastleNT!
#DunsterCastle

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A fully working water mill at @DunsterCastleNT!
#DunsterCastle https://t.co/Y6MOYXtpFc

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A fully working water mill at @DunsterCastleNT!#DunsterCastle pic.twitter.com/Y6MOYXtpFc
— Grant Rivers🇬🇧🏳️‍🌈 (@SnowAndBeach) April 20, 2018

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A fully working water mill at @DunsterCastleNT!
#DunsterCastle https://t.co/Y6MOYXtpFc

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A fully working water mill at @DunsterCastleNT!
#DunsterCastle https://t.co/Y6MOYXtpFc

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A fully working water mill at @DunsterCastleNT!
#DunsterCastle

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Analyses this device in terms of energy conservation,processes, energy changes and dissipation #PW6   This would be nice in the lab😀 #ploughing @NPAIE #jcscience #edutwitter.

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Analyses this device in terms of energy conservation,processes, energy changes and dissipation #PW6   This would be nice in the lab😀 #ploughing @NPAIE #jcscience #edutwitter. https://t.co/7sXEaECd0l

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Analyses this device in terms of energy conservation,processes, energy changes and dissipation #PW6 This would be nice in the lab😀 #ploughing @NPAIE #jcscience #edutwitter. pic.twitter.com/7sXEaECd0l
— Mike Kavanagh (@Mikekav66) September 19, 2019

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Analyses this device in terms of energy conservation,processes, energy changes and dissipation #PW6   This would be nice in the lab😀 #ploughing @NPAIE #jcscience #edutwitter. https://t.co/7sXEaECd0l

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Analyses this device in terms of energy conservation,processes, energy changes and dissipation #PW6   This would be nice in the lab😀 #ploughing @NPAIE #jcscience #edutwitter. https://t.co/7sXEaECd0l

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Analyses this device in terms of energy conservation,processes, energy changes and dissipation #PW6   This would be nice in the lab😀 #ploughing @NPAIE #jcscience #edutwitter.

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Inspired by the work of @olicav, I tried my hand at a 'dual coding' infographic revision sheet - the result is a very simple handout on the key concepts and vocabulary for @JctScience energy (PW6, ES6)

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Inspired by the work of @olicav, I tried my hand at a 'dual coding' infographic revision sheet - the result is a very simple handout on the key concepts and vocabulary for @JctScience energy (PW6, ES6) https://t.co/CgKiN0XRHE

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Inspired by the work of @olicav, I tried my hand at a 'dual coding' infographic revision sheet - the result is a very simple handout on the key concepts and vocabulary for @JctScience energy (PW6, ES6) pic.twitter.com/CgKiN0XRHE
— Humphrey Jones 🇺🇦 (@humphreyjones) December 9, 2019

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Inspired by the work of @olicav, I tried my hand at a 'dual coding' infographic revision sheet - the result is a very simple handout on the key concepts and vocabulary for @JctScience energy (PW6, ES6) https://t.co/CgKiN0XRHE

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Inspired by the work of @olicav, I tried my hand at a 'dual coding' infographic revision sheet - the result is a very simple handout on the key concepts and vocabulary for @JctScience energy (PW6, ES6) https://t.co/CgKiN0XRHE

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Inspired by the work of @olicav, I tried my hand at a 'dual coding' infographic revision sheet - the result is a very simple handout on the key concepts and vocabulary for @JctScience energy (PW6, ES6)

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Contains support on concept of energy - Pages 28..

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Caution- this gif doesn't include friction or thermal dissipation

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BBC Bitesize Energy

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Energy transfers and efficiency - Revision 4 - GCSE Physics (Single Science) - BBC Bitesize

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Revise energy transfers and use sankey diagrams to calculate the efficiency of these conversions with BBC Bitesize GCSE Physics.

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Calculations on energy efficiency

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Website with questions on energy transfer processes and sankey diagrams

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In this worksheet, we will practice correctly drawing and interpreting Sankey diagrams for processes that involve the transfer of energy.

Q1:

The image shows a Sankey diagram for a light bulb that is supplied with 100 J of energy, where 80 J of energy is wasted as heat. What is the useful energy output of the bulb?

Q2:

The image shows a Sankey diagram for a fluorescent light. What is the input power of the fluorescent light?

Q3:
The image shows a Sankey diagram of a 100 W light bulb.

What does 1 square of the diagram represent?

How much energy is wasted as heat by the light bulb?

Q4:
The image shows a Sankey diagram for a 1.7 kW kettle turned on for 3 minutes.

Is the majority of the energy supplied to the kettle wasted or transferred usefully?

AThe majority of the energy is wasted.

BThe majority of the energy is transferred usefully.

Q5:

The image shows a Sankey diagram for a light bulb that has been drawn incorrectly. In which of the following ways has the diagram been drawn incorrectly?

1. The value represented by one square of the diagram is not consistent.

2. 1 square of a Sankey diagram should always represent 1 watt or

3. Sankey diagrams can only be used for energy, not power.

4. The two output arrows both represent but they are of different widths.

5. The total output power is not equal to the total input power.

Q7:
The image shows Sankey diagrams for four different processes.

Which process is the most efficient?

Which process is the least efficient?

Q8:

The image shows a Sankey diagram for a process. Which of the following statements correctly describes why this process is not physically possible?

AThis process is inefficient. In order to be physically possible, processes need to have an efficiency greater than 50%.

BThe output energy is greater than the input energy. This process would create energy. Since energy cannot be created or destroyed, this process is not physically possible.

Q9:

The image shows a Sankey diagram for a car motor that is supplied with of energy, where 480 J of the energy is converted into useful kinetic energy. How much energy is wasted?

Q10:

The image shows a Sankey diagram for a process. Which of the following statements correctly describes why this process is not physically possible?

AReal physical processes always have efficiencies less than 50%. This process would have an efficiency greater than 50%.

BAll of the input energy of this process is the recycled energy, but the useful output energy is greater than zero. This process appears to create energy, but since energy cannot be created or destroyed, it is not physically possible.

CEnergy cannot be recycled in a physical process.

DOnce started, this process could continue indefinitely, but since there is no initial input energy, it cannot be started.

Q11:
The image shows a Sankey diagram for a steam locomotive. Coal in a boiler is used to heat water to turn it into steam. The steam is then used to drive pistons that turn the wheels. In this process, some of the input energy is converted to the kinetic energy of the train, some is lost as heat, and some of the heat is recycled.

What does 1 square represent in the diagram shown?

How much energy is lost as heat?

How much energy is recycled?

The diagram shows the energy usage per second for the train to maintain a constant speed of What input energy is needed for the train to maintain this constant speed?

Coal has an energy density of about How much coal needs to be combusted per minute in order to keep the train moving at Assume that all of the energy in the coal is transferred to the steam.

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In this worksheet, we will practice correctly drawing and interpreting Sankey diagrams for processes that involve the transfer of energy. Q1: The image shows a Sankey diagram for a light bulb that is supplied with 100 J of energy, where 80 J of energy is wasted as heat.

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Sankey Diagrams

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Energy stores

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Practical Physics " Energy " Helpful language for energy talk

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Page 29 - sankey diagrams and questions

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Energy Horizons- JC Science Teachers Workshop

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Sankey Diagrams

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The 5 steps to drawing a perfect Sankey diagram

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A physics revision video about Sankey Diagrams and efficiency.

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Contains episodes about energy stores and energy transfers

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Revise - GCSE Physics Revision - Podcast

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Let other students help you revise for your GCSE Physics exams. In this series, students break down complicated revision subjects to its core components helping you rock your exams. Find your FREE online course here: http://bit.ly/37Y7XgC - Listen to Revise - GCSE Physics Revision instantly on your tablet, phone or browser - no downloads needed.

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Energy is an abstract concept that requires lots of discussion with students about physical observations and their interpretation. We begin with simple experiments that introduce the language of energy, and go on to include more advanced topics such as the energy shared amongst the particles of matter - the internal energy in hot objects, often called 'heat'.

The following guidance notes cover these practical collections:

Acknowledgement
For the Energy topic, we are very grateful to the following for their advice:

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Energy is an abstract concept that requires lots of discussion with students about physical observations and their interpretation. We begin with simple experiments that introduce the language of energy, and go on to include more advanced topics such as the energy shared amongst the particles of matter - the internal energy in hot objects, often called 'heat'.