15.1 Notes - Energy and Its Forms
- 1. ENERGY The ability to do work When work is done on an object energy is transferred. 2 types Kinetic – moving objects KE = ½ mv 2 Potential – stored energy
- 2. 2 types of Potential Gravitational – depends on objects height PE = mgh Elastic – potential energy of something that is stretched or compressed
- 3. Forms of Energy 15-1
- 4. Mechanical Energy Energy associated with motion and position of everyday objects It is the sum of potential and kinetic energy
- 5. Thermal Energy Total potential and kinetic energy of all microscopic particles in an object When particles move faster the thermal energy increases
- 6. Chemical Energy Energy stored in the chemical bonds of a compound Energy is released when bonds are broken
- 7. Electrical Energy Energy associated with electrical charges These charges exert forces that do work EX batteries and lightening
- 8. Electromagnetic Energy Energy that travels through space in waves Often used in communications
- 9. Nuclear Energy Energy stored in atomic nuclei Nuclear Fission releases energy by splitting nuclei Nuclear Fussion releases energy when nuclei form a massive nucleus – This is the power of the sun Nuclear power plants produce electricity Atoms are split and the heat generated is used to heat water Steam Spins turbines making electricity