Conservation Of Energy Flashcards
Where is energy stored?
Pretty much anywhere
What energy is stored in food, fuel and batteries.
Chemical energy
What energy is stored in moving objects?
Kinetic energy
What energy is stored in hot objects?
Thermal energy
What energy is conserved in stretched, squashed or twisted materials?
Strain energy or elastic potential energy
What energy is conserved in high positions?
Gravitational potential energy
What an energy is conserved inside atoms?
Atomic energy or nuclear energy
Give 2 examples of energy being moved between different stores?
When an electric kettle is used to heat up water, energy transferred to the kettle by electricity ends up as a store of thermal in the hot water
Name 3 ways energy is transferred
Heating, electrically, by radiation
What can energy not be?
Created or destroyed
What can energy only be and what is this called?
It can only be transferred from one store to another, this is called the law of conservation of energy. The total energy transferred by the system is the same as the energy put into the system
What are the units for measuring energy?
Joules (J)
What happens to wasted energy in energy transfers?
Goes into the surrounding
Is energy always transferred into forms that are useful?
No, even though energy is always conserved, think of the kettle-the energy stored in the hot water is useful but the energy stored in the kettle itself and the surroundings is not
What shows the amount of energy transferred and what do the arrows represent?
A sankey diagram and the arrows represent the amount of energy in joules