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Energy Transfer Sound energy Heat energy Chemical energyLight energy Gravitational potential energy Electrical energyKinetic energy Key wordPronunciationDefinition.

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Presentation on theme: "Energy Transfer Sound energy Heat energy Chemical energyLight energy Gravitational potential energy Electrical energyKinetic energy Key wordPronunciationDefinition."— Presentation transcript:

1 Energy Transfer Sound energy Heat energy Chemical energyLight energy Gravitational potential energy Electrical energyKinetic energy Key wordPronunciationDefinition Conservation of energykon-ser-vey-shunEnergy can neither be created or destroyed during a transfer of energy. Recall the 8 common types of energy Apply the conservation of energy to a range of appliances All Most Elastic potential energy Learning objectives

2 The conservation of energy When energy is transferred. energy can not be created or destroyed 100J of electrical 60J of light 40J of heat

3 The energy transfers in a computer (What’s missing? What is the useful and waste energy?) Electrical energy ( 200 J ) Sound + light energy ( 80 J ) ( )

4 Nintendo DS (16 J) Electrical energy ( ) Light + sound ( 14 J )

5 Energy transfer within a car 8,000 J ( 7,200 J ) Heat + sound ( )

6 Example 100 J electrical 25 J light 75 J Heat Calculating efficiency TASK Move around the room, working out the efficiency of each of the devices.

7 Sankey diagrams 10 Joules electrical energy 1 square is 1 joule of energy 7 squares = 7 joules 3 squares = 3 joules

8 Energy splat! Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy Watch this space!

9 Energy splat! 1 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What is the useful energy ?

10 Energy splat! 2 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What is the useful energy?

11 Energy splat! 3 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What is the useful energy produced in the moving air?

12 Energy splat! 4 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What type of energy is generated from a wind turbine?

13 Energy splat! 7 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What type of energy is generated?

14 Energy splat! 8 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What type of energy is used up by the kettle?

15 Energy splat! 9 Kinetic energy Gravitational potential energy Sound energy Chemical energy Light energy Electrical energy What type of energy is generated?

16 Energy splat! 11 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What type of energy is stored in the match?

17 Energy splat! 12 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy An object high above the Earth has lots of this type of energy!

18 Energy splat! 13 Kinetic energy Gravitational potential energy Heat energy Chemical energy Light energy Electrical energy What type of energy does coal contain?

19 50 J in 150 J light Energy splat! 14 100 joules 20% 75% 200 joules 1,000 joules 50 joules What is the efficiency 200 J in

20 ?? j waste 300j light Energy splat! 15 100 joules 20% 25 joules 200 joules 1,000 joules 50 joules How much waste energy? 500j in

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