Energy Flashcards
What is chemical energy?
Energy stored in a substance due to the bonds between atoms
What is kinetic energy?
The energy stored in an object that is moving, depending on its mass and speed
What is gravitational potential energy?
The energy stored in an object due to its mass and position in a gravitational field. Depends on the object’s mass, the height above the Earth and the gravitational field strength
What is elastic potential energy?
The energy stored in an object when it is stretched or compressed
What is thermal energy?
The energy stored in an object because of its temperature
What is electrostatic energy?
The energy stored in a system of charged objects
What is magnetic energy?
The energy stored in a system of magnetic objects
What is nuclear energy?
The energy stored in the nuclei of atoms, due to the bonds between protons and neutrons
List all eight stores of energy
Chemical Kinetic Gravitational potential Elastic potential Thermal Electrostatic Magnetic Nuclear
List all four energy transfers
Mechanically (by forces) Electrically (current moving through a potential difference) By heating By radiating light By radiating sound
What is the principle of the conservation of energy?
Energy can neither be created nor destroyed, only transferred between one store and another or dissipated into the surroundings
What does the conservation of energy mean about the total energy of a closed system?
The total energy of a closed system has no net change
Define conduction
The transfer of thermal energy due to vibrating particles colliding with neighbouring particles and transferring kinetic energy between them
Define convection
The transfer of thermal energy due to particles with high kinetic energy moving from hot to cold areas
Define radiation
The transfer of thermal energy by the emittance of electromagnetic infrared radiation
