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Energy Quiz Outline
What you need to know for the quiz
1. The different forms of energy from the notes.
2. Know details about the form of energy.
3. Know what is work and power.
4. Know how to calculate work and power.
Different forms:
A. Mechanical
B. Thermal
C. Chemical
D. Nuclear
E. Electrical
F. Light
G. Sound
2. Details
A. Mechanical
Mechanical energy is the most familiar form of energy. It is the energy a substance or system
has because of its motion or position (state).
◦ Gravitational Potential Energy
◦ Elastic Potential Energy
◦ Kinetic Energy
2. Details
B. Thermal
◦ energy that comes from heat.
3 methods of transfer
a. Conduction
b. Convection
c. Radiation
2. Details
◦ Energy stored in the bonds of chemical compounds
◦ Exothermic reaction
◦ Examples: batteries, biomass, petroleum, natural gas, coals
New substance is formed after expending all the chemical energy
2. Details
Nuclear energy
Stored in the nucleus of atoms
Two types
Fission – split of atoms (example: nuclear power plants)
Fusion – combining atoms (example: sun)
2. Details
◦ Movement of electrons
◦ Require a circuit to transport energy
◦ AC and DC
2. Details
Electro-magnetic radiation
Cannot be stored
Always in motion
Wave and particle at the same time
Energy in form of photons
2. Details
◦ Energy is carried in waves
◦ Energy is from a source that causes vibrations in a medium.
◦ Energy in motion
3. Work and Power
Work is the product of force and distance.
Net Force applied in the same direction of motion.
Examples: stretching a bow, raising a ram of a pile driver, push ups.
Power is the rate of work done per unit time.
Unit of work is Joules and unit of power is Watts.
4. Calculating work and power
W = Fd
P = W/t or P = Fd/t