law of conservation of energy

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....describes the energy conservation and transformation of energy.........

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law of conservation of energy

  1. 1. Energy 101: BasicEnergy 101: Basic Concepts of EnergyConcepts of Energy & its Transformation& its Transformation
  2. 2. ENERGY CONVERSION AND THE LAW OF CONSERVATION OF ENERGY
  3. 3. The Law of Conservation of Energy  Energy can neither be created nor destroyed but can be transformed to other forms.  This law can be dissected into 3 statements;  Energy cannot be created.  Energy cannot be destroyed.  It can only be converted from one form to another.
  4. 4.  Energy of an object can be thought of as the sands in an hourglass!  Energy always remain same or fixed in quantity!  But this sand can change position, from the top to bottom and bottom to top! Likewise energy can change in form eg. From KE  PE Conservation of Energy
  5. 5. Energy Conversion  Energy can be changed from one form to another. Changes in the form of energy are called energy conversions.
  6. 6. Energy conversions  All forms of energy can be converted into other forms.  The sun’s energy through solar cells can be converted directly into electricity.  Green plants convert the sun’s energy (electromagnetic) into starches and sugars (chemical energy).
  7. 7. Other energy conversions  In an electric motor, electromagnetic energy is converted to mechanical energy.  In a battery, chemical energy is converted into electromagnetic energy.  The mechanical energy of a waterfall is converted to electrical energy in a generator.
  8. 8. Energy Conversions  In an automobile engine, fuel is burned to convert chemical energy into heat energy. The heat energy is then changed into mechanical energy.
  9. 9. Chemical  Heat Mechanical
  10. 10. Chemical  Heat Mechanical

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