180 likes | 286 Views
Our BIG question:. HOW MUCH ENERGY IS IN AN EARTHQUAKE ?. Energy. The capacity to do work Or the ability to make change Work: the result of a force acting on a distance. The Joule The unit for both work and energy. (named after James Prescott Joule). Forms of Energy.
E N D
Our BIG question: HOW MUCH ENERGY IS IN AN EARTHQUAKE ?
Energy • The capacity to do work • Or the ability to make change • Work: the result of a force acting on a distance The Joule The unit for both work and energy. (named after James Prescott Joule)
Forms of Energy • radiant (light) energy • chemical energy • mechanical energy • nuclear energy • electrical energy • heat (thermal) energy • energy of sound • Kinetic energy
Types of Energy • Not to be confused with forms of energy! • Kinetic Energy energy associated with motion. • Potential Energy stored energy.
Potential or Kinetic? • radiant (light) energy • chemical energy • mechanical energy • nuclear energy • Gravitational energy • electrical energy • heat (thermal) energy • energy of sound • Kinetic • Potential • Kinetic • Potential • Potential • Kinetic • Kinetic • Kinetic
What energy conversions are taking place in terms of the woman? What types of energies does she have?
Law of Conservation of Energy • energy can change form, but it cannot be created or destroyed. • That means the total amount of energy stays the same.
Law of Conservation of Energy • energy can change form, but it cannot be created or destroyed. • That means the total amount of energy stays the same.
Efficiency • How much of the energy input goes into doing useful work. Which of these light bulbs is more efficient?
Renewable Energies • Solar • Hydro • Geothermal • Wind • Advantages of Renewable energy • It can be used without depleting it • No to minimal greenhouse gas emissions • Disadvantages • Expensive – initial investment is high • Difficult to generate quantities of energy equal to traditional forms • Reliability of supply can be unpredictable
Rube-Goldberg machines ok GO honda commercial