Energy
Definition of energy
The ability to move or change
Definition of force
a push or pull
Light travels in
Straight lines
The hotter an object is the __________ the molecules move
Faster
What type of heat transfer occurs when you feel the heat of the sun on your skin?
Radiation
The energy something has because it is moving
Kinetic Energy
Motion is defined by _____ and _____
Speed and direction
Light will change an object if it is ___
Absorbed (taken in)
The measure of the average kinetic energy of molecules in a substance
Temperature
What device converts kinetic energy to electric energy?
A Generator
Stored energy
Potential energy
A force that opposes motion
Friction
The distance between two waves
True or False: A cup of tea will have a higher thermal energy than a 5 gallon bucket of room temperature water
False
In a flying ball, as the kinetic energy increases, the potential energy
decreases
The energy something has because it is at rest at a height above the ground
Gravitational energy
Newton's first law
What determines the intensity of a wave?
Amplitude
Energy will always transfer from a ______ object to a _________ object
hotter, colder
At what temperature will the molecules of an object stop moving?
Absolute zero
The energy something has because it is stretched or pulled
Elastic Energy
Newton's second law
Force = mass x acceleration
What happens to the frequency of a wave if it gains more energy?
It decreases
True or false: equilibrium is reached when two parts of a system have the same thermal energy
False
When light changes direction as it moves from one medium to another, this is called
Refraction