Science 6B
Published on Mar 16, 2016
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PRESENTATION OUTLINE
CLASSIFICATION OF ENERGY
- Energy is classified by how it is sensed or by its principal source
- There are several ways to classify energy
- Mechanical, thermal, acoustic, electrical, magnetic, radiant, and chemical
MECHANICAL ENERGY
- Consists of potential and kinetic energy
- Systems that consist of lone individual particles or masses of particles acting as a single object
- Mechanical potential energy is the energy of an object due to its physical position
- A common example of mechanical potential energy is gravitational potential energy
THERMAL ENERGY
- The sum of the kinetic energies of all the particles in an object
- All particles in matter posses some sort of kinetic energy
- Movement of thermal energy into or out of a system is called heat
- Heating is the process of gaining thermal energy
- Cooling is the process of losing thermal energy
ACOUSTIC ENERGY
- Transmission of energy through matter by particle oscillation
- This energy moves through the air and matter through vibrations
- Moves in waves
ELECTRICAL ENERGY
- Electrical charges exert field forces in their surroundings
- Two objects carrying the same charge repel each other (opposites attract)
- Source of electrical energy is found in the excess, the lack, or the movement of electrons
MAGNETIC ENERGY
- Has the ability to do work through the influence of a magnetic field
- Exerts a field force
- Has north (positive) and south (negative) poles
RADIANT ENERGY
- Electromagnetic energy is electric and magnetic energy in one form
- Also called radiant energy-radiated by matter and transmitted through a vacuum
- Visible light is the most familiar kind of radiant energy
CHEMICAL ENERGY
- potential energy stored in chemical bonds
- Depends on the kind of atoms in an object and how they are bond with one another
- Youcuse chemical energy while cooking foods
