new topic can you compare your answers to yesterdays energy circus with answers from other groups....
TRANSCRIPT
![Page 1: New Topic Can you compare your answers to yesterdays energy circus with answers from other groups. Who was correct?!? You have 5 minutes to do this](https://reader035.vdocuments.net/reader035/viewer/2022070305/55143b9c550346414e8b46b2/html5/thumbnails/1.jpg)
New TopicCan you compare your answers to yesterday’s “energy circus” with answers from other groups. Who was
correct?!?
You have 5 minutes to do
this
![Page 2: New Topic Can you compare your answers to yesterdays energy circus with answers from other groups. Who was correct?!? You have 5 minutes to do this](https://reader035.vdocuments.net/reader035/viewer/2022070305/55143b9c550346414e8b46b2/html5/thumbnails/2.jpg)
Last lesson
• Types of energy
• Law of conservation of energy
• Energy flow diagrams
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What is Energy?
“The capacity to do work”
Not a very good definition!
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Types of energy
Energy can take many forms;
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Light
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Sound
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Electric
![Page 10: New Topic Can you compare your answers to yesterdays energy circus with answers from other groups. Who was correct?!? You have 5 minutes to do this](https://reader035.vdocuments.net/reader035/viewer/2022070305/55143b9c550346414e8b46b2/html5/thumbnails/10.jpg)
Chemical
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Gravitational potential
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Nuclear
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Types of Energy
Heat Chemical
Light Gravitational
Sound Elastic/strain
Kinetic Nuclear
Electric
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Types of Energy
Heat Chemical
Light Gravitational
Sound Elastic/strain
Kinetic Nuclear
Electric
Stored/potential
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The Law of Conservation of Energy
Energy can be changed (transformed) from one type to another, but it can never be made or destroyed.
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This means that the total amount of energy in the Universe stays the same!
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Energy Flow diagrams
We can write energy flow diagrams to show the energy changes that occur in a given situation.For example, when a car brakes, its kinetic energy is transformed into heat energy in the brakes.
Kinetic heat
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Today’s lesson
Measuring the energy content of two fuelsYou will move to the next experiment at the appropriate signal.
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Gather round Mr Porter
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Energy Content of two fuelsFuel Initial
mass (g)
Final mass (g)
Mass of fuel used (g)
Initial temp of water (°C)
Final temp of water (°C)
Temp rise of water (°C)
Energy released (J)
Energy released per gram of fuel (J/g)
Wax
Ethanol
Volume of water (cm3) x 4.2 x temp rise
Energy ÷ mass
Then write three sentences saying what you have discovered, and suggesting two ways the experiment could be improved.