Conservation of energy Flashcards
Can energy be created
It cannot be created or Destroyed, however it can be transmitted
What are examples of energy stores
Thermal
Kinetic
GPE
EPE
Chemical
Magnetic
Electrostatic
Nuclear
What is efficiency
How good something is at transferring energy into useful stores
What are 3 ways, a phone can transmit energy
Light, Sound, Heat
Examples of Non-renewable energy
Oil, Coal, Natural Gas
What are examples of renewable energy
Solar, Wind, Hydroelectric, Tidal, Biofuel, geothermal, wave power
What is meant by the conservation of energy
Total amount of energy in a closed system stays the same
Describe energy change when ball is thrown up into the air
Up = KE is converted to GPE
Peak = Max GPE no KE
Down = GPE is converted to KE
How does the energy stay when throwing a ball and it falling
Total energy will stay constant if no external factors take place
Explaim the energy changes in a lightbulb
Electrical energy is converted to light and heat
Light is useful, heat is not useful
What is thermal Conductivity
the rate in which a substance transfers heat
State an object that has a high thermal conductivity
metal
State an object that has a low thermal conductivity
plastics, fluid
What can energy do as it can not be created or destroyed
Dissipated, Transferred or stored
How do breaks slow down car
work done by friction between breaks and wheels reduces kinetic energy, slowing the car down
