Book+1+Chapter+5+Lesson+2

II. Energy Conversion & Conservation =A. Falling water is used to generate electricity= =B. Energy Conversion- mechanical energy of moving water can be converted or transformed into electrical energy. A change from 1 form of energy to another.= =1. Any form of energy can be converted into another form= =2. Most common- potential energy to kinetic energy= =C. Conservation of Energy= =1. Law of Conservation of Energy- when one form of energy is converted into another, no energy is destroyed in the process= =2. Energy cannot be created or destroyed= =i. All energy can be accounted for= =ii. Total amount of energy is the same before and after any process= =3. Energy and Friction= =i. Objects experiences friction, the motion (kinetic energy) of the atoms or molecules increases= =ii. Thermal Energy increases= =iii. Mechanical energy is converted to thermal energy= =a.) friction converts it= =b.) why no machines is 100% efficient= =1.) work output< work input= =2.)energy converted to thermal energy= =4. Energy and Matter= =i. Albert Einstein- theory of relative= =a) energy can sometimes be created= = = =b) nuclear reactions- huge amounts of are produced by destroying tiny amounts of matter= =c) matter and energy can be converted back and forth= = = =5.2 Quiz= =1. false- at all points= =2. false- no energy is lost= =3. true= =4. true= =5. false- point 1= =6. a change from one form of energy to another= =7. when 1 form of energy is transformed to another, no energy is destroyed= =8. anything that has mass and takes up space= = = =Study Guide= =13. potential energy being converted into kinetic energy= =14. no energy is destroyed in the process= =15. add its potential and kinetic energies= =17. false- thermal= =18. true= =19. false- true= =24. thermal= =27. work= =28. multiple= =29. C at this point which is the highest point, all of the ball's energy is gravitational potential energy. The ball doesn't have kinetic energy because its not moving at this point.= =30. C kinetic energy depends on the speed of the ball. As the ball rises from A to C, it slows down until the point at which it changes direction and begins to fall.=