Download Energy Conversions - Lanier Bureau of Investigation

Energy Conversions
Law of Conservation of Energy
Energy cannot be created or destroyed but it
can change forms.
We call that energy conversion or
transformation
Energy conversions
Any conversion of energy ALWAYS include some
thermal energy.
Sometimes it is the result of friction, a force that
opposes motion.
Closed system
A closed system is a well-defined group of
objects that transfer energy between one
another. Ex. Roller coaster or a camera. All
energy and all matter remain in the system.
(This is not very realistic).
How to we determine energy
conversions?
Start with the energy you have then…
…….list every energy that is a result of
that first energy working!
What energy transformations
happen in a blow dryer?
Blow dryer
Electrical to
thermal (heat)
sound (noise)
light (heat source)
& kinetic/mechanical (fan)
What are the energy
transformations that happen with
a microwave?
Microwave
Electrical to
Light,
thermal,
sound &
kinetic/mechanical
What are the energy
transformations that happen when
you drive a car?
Car
Chemical energy (gas) to
Light,
sound,
electrical,
thermal, &
kinetic/mechanical