Download Transformations of Energy Notes

Transformations of Energy
Law of Conservation of Energy- energy can not be created or destroyed
Law of Conservation of Mass- matter can not be created or destroyed
Common Changes of Energy
Energy 1
Chemical
Mechanical
Sound
Heat
radiant
Nuclear
Electric
Energy 2
To electrical
To electrical
To electrical
To radiant
To electrical
To heat
To sound
Source
Storage battery
Generator
Microphone
Light bulb
Solar battery
Nuclear reactor
Door bell
Potential energy- stored energy like a skateboarder at the top of a half pipe
Kinetic energy- the energy of motion
Forms of Energy
Forms of Energy
Thermal
Radiant
Sound
Chemical
Electrical
Mechanical
Nuclear
Some Sources
Burning, friction
Sunlight, light microwave, X-Ray
Vibrations, thunder, amplifiers
Battery, wood, match, coal, gasoline
Generator, lightning, TV, radio, computer
Simple machines, gasoline motor, windmill, rubber
band
radioactivity
Energy is transferred by conduction, convection, or radiation.
Conduction is energy transferred through direct contact.
Convection is energy transferred through the currents of liquids and gases.
Radiation is energy transferred by waves through space.
Insulators prevent the transfer of energy (cork, aluminum foil, wood, plastic, foam, fiberglass
Conductors help transfer energy (metals such as copper, aluminum, and water)
Waves
There are two general categories of waves: Mechanical and Electromagnetic
Mechanical waves must move through solids, liquids, or gases to transport their energy.
Electromagnetic waves can travel through a vacuum (empty space).
The matter that a wave travels through is called a medium. For example, the medium through which a
wave travels in the ocean is the water.
The crest is the top of the wave
The trough is the bottom of the wave
The wavelength is the distance from the crest of one wave to the crest of the next wave
Amplitude is the height of the wave
Frequency is how many waves pass a given point in a given amount of time.
Transverse waves have up and down movement.
Longitudinal or compression waves push against each other in a straight line
Sound Waves
Sound waves move faster as temperature increases. Sound waves also move faster as humidity
increases.