Show:
Energy Transformations
Energy Conservation
Potential and Kinetic
Types of Energy
Definitions
100
Burning a candle
Chemical energy -> thermal energy + light energy
100
Says that energy cannot be created or destroyed
the law of conservation of energy
100
The faster an object is moving the more ___________ it has.
Kinetic energy
100
Energy of rearranging atoms
Chemical energy
100
Energy is defined as _________.
The ability to do work.
200
a football player eating a sandwich before a game
chemical energy --> mechanical energy or kinetic energy
200
Name 3 materials that are good conductors
metals may include: iron, nickel, aluminum, gold, silver, copper, etc also water
200
formula to solve is weight x height
gravitational potential energy
200
Stored energy and energy of motion
mechanical energy
200
Energy of moving electrons
Electrical energy
300
a blender
electrical energy --> kinetic energy + sound energy + thermal energy
300
Name 3 materials that are insulators
cloths: wool, flannel, fleece, cotton; plastic, foam, wood
300
A skier that has a mass of 200 kg and has a speed of 20 m/s going down hill and a skier that has a mass of 100 kg and is going down the slopes at a speed of 25 m/s. Who has more KE? Why?
The skier that is less massive but going faster because speed affects KE more than mass does. In the equation mv2/2, speed is squared which affects the amount of joules more than mass.
300
Factors that affect potential energy
Weight and height or mass and position
300
energy produced by the vibrations of waves moving through the air
sound energy
400
Using a solar-powered calculator
light energy --> electrical energy
400
Every energy conversion technically has this involved because of friction
Thermal energy
400
name the two factors that affect kinetic energy
mass and speed/velocity
400
An atom splitting is this type of energy.
Nuclear energy.
400
a star has atoms fusing together in the core to burn
nuclear energy
500
A car driving down the interstate
chemical energy --> electrical energy --> mechanical energy or kinetic energy (+ sound energy + light energy)
500
Photosynthesis
Light energy --> Chemical energy
500
A boulder is rolling down a hill. It has a height of 10 m and mass of 50 kg. It rolls at a speed of 15 m/s. How much potential energy does it have?
weight x height = 10 x 50= 500 J of energy speed does not matter when calculating for GPE
500
The factor that affects energy of motion the most
Speed or velocity = mv2/2
500
energy is measured in units called __________
joules