Unit 4-Energy Flashcards
Work
Is done when a force moves an object through a displacement
Energy
Ability to do work
Joule
A newton-metre Nm
Nuclear energy
Stored in the nuclei of atoms fusion or fission
Elastic energy
Stored in an object forced out of its normal shape
Chemical energy
From molecules, released in reactions
Sound energy
From longitudinal vibrations
Thermal energy
Random motion of molecules
Radiant energy
From electromagnetic waves
Electrical energy
From moving electrical charges
Gravitational potential
Energy due to position above a reference point
Kinetic energy
From movement
Law of conservation of energy
Energy cannot be created or destroyed only transformed
Voltage
The number of joules of energy per coulomb of charge
Power
The rate of energy or J/s
Mechanical energy
The sum of gravitational potential energy and kinetic energy
Heat
The thermal energy being absorbed released or transferred from one object to another
Temperature
The measure of the average kinetic energy of the particles of a substance
Thermal expansion
A substance absorbs thermal energy and expands
Thermal contraction
A substance releases thermal energy and contracts
Conduction
Collisions of atoms and electrons transfers heat through a material or between two materials in contact
Radiation
Energy is transferred in electromagnetic waves
Specific latent heat
Amount of energy required to change state
Specific latent heat of fusion
Heat to change a liquid to solid or vice versa
Specific latent heat of vaporization
Heat to change a liquid to a vapour or vice versa