Energy transformation

1. By: Devinda V.S, Firman Otto Energy Transformation

2. What is Energy Transformation? All changes you can detect around you are due to energy transformation Vital to survival Energy cannot be made or destroyed

3. City in the past Source of light  coal, wood, candles Source of movement  animals

4. City Today Source of light  electricity Source of movement  petrol or diesel

5. Measuring Work The formula is : work = force x distance E.g. : 10N x 2m = 20Nm/ 20 J ( Joule ) Work occurs when a force moves an object through a distance

6. Making a Calculation The weight of an object is measure in N (Newton) The distance is measure in m ( Meter )

7. Answer 100N x 1m = 100J

8. Energy Transfer Diagram Strain Energy  Catapult  K inetic energy & Sound energy

9. Another example… Kinetic energy  balloon  strain energy

10. Sankey Diagra m It is the other way to show energy transformation, the width of the arrows indicate the amount of energy

11. A : Light bulb 100 J Light energy 10 J Waste heat energy 90 J Q : Draw a sankey diagram for light bulb that have input energy of 100 J and the output of light energy 10 J and heat energy 90 J

12. Plants and Energy When a seed of a plant is dig in the soil it use chemical energy in the seed to grow and when it reach the surface of the soil it start to grow leaves.

13. Plant  herbivorous  carnivorous

14. Energy transfer for photosynthesis Light energy + chemical energy  chemical energy

15. Energy and Ourselves In a can of food there is amount of energy written. This are measure in Joule and Kilo Joule.

16. Chemical in your body is release in a process called respiration. Most of chemical energy in your body is use for movement ( kinetic energy) and for keeping your body warm ( Heat energy).

17. Generating Electricity It is a very useful form of energy Michael Faraday (1791-1867) discovered that an electric current could be made to flow in a wire.

18. Bicycle dynamo Bicycle dynamo have a wheel in its top. When the wheel is in contact with the tyre it rotates and generate electricity which provide the lamp for the bicycle.

19. The power station generator The water is boiled and change into steam. The steam turn the turbine. The electromagnet producing electricity in the coils and direct it to the transformer. The transformer change the voltage to the higher one and ready to being given to the public.

20. Conservation of energy

21. Thank You For Your Attention