Download What are the six main forms of energy?

What are the six main forms
of energy?
Mechanical
• Energy of motion both potential and
kinetic.
Ex: water in a waterfall, wind,
sound, blood flowing through
veins, drive, walk, ride a bike,
hit a ball.
Heat/Thermal
• All matter is made up of tiny particles
called atoms that are constantly moving.
• The internal motion of atoms =
heat/thermal energy.
Ex: phase changes
Chemical
• Energy is required to bond atoms
together.
• When bonds are broken chemical
energy is released.
Ex: When you digest food you break
bonds and release chemical energy later
when you exercise you use chemical energy
stored in muscles obtained from food.
Electrical
The energy associated with
electrical charges.
Two types of examples:
• Unnatural: Batteries to operate
calculators and flashlights.
• Natural: lightning
Electromagnetic
• Energy that travels in the form
of waves through space.
– The sun is our main source of all
energies.
– Examples of Electromagnetic energy:
• Visible light and X-rays
Nuclear
Nucleus of an atom is the source.
• There are two ways to release nuclear
energy.
– 1. Fusion- when nuclei are joined
together.
– 2. Fission- when nuclei are split apart.
– Examples:
• heat and light of the sun
• Hydrogen bomb
What is an energy
conversion?
•
Energy can be transferred from
one object to another and energy can
be changed from one form to another.
•
Changes in the forms of energy
are called energy conversions
What is one of the most
common energy conversions?
• Changing of potential energy to kinetic
energy or vice versa.
• Ex. A stone held high is air has PE. As the
stone falls it loses PE due to decrease in
height. At the same time, its KE increases
because its velocity increases. PE is converted
to KE
Example: pendulum
• 1 Max PE; No KE
• 2 Max KE
• 3 Max PE; No KE
Law of Conservation of
Energy:
A. Energy can be neither created nor
destroyed by ordinary means
B. All forms of energy can be converted
to other forms. In this extended
process, energy is never lost.
Energy Conversion in our
bodies
• Food energy is stored chemical
energy, which our bodies store to be
used later. This chemical energy is
converted into other energies which
allow us to do work.
Einstein
• Energy = mass x speed of light
– Energy and mass are equivalent and can
be converted into one another.
– 1 gram of matter turned entirely into
energy = 90,000,000,000,000 J
– 1 gram of explosive produces 2931 J
This is because it is not entirely
turned into energy, there is some matter
left