Acceleration: Velocity change as measure in metres per second (m/s2)
Alternating current: Electric current that changes its direction every half-cycle
Amplitude: This is the height which a wave (e.g. sound wave) reaches from the zero position.
Angle of incidence: This is the angle which exists between an incident ray and the normal
Angle of reflection: This is the angle which exists between the reflected ray and the normal
Conduction: This is the transfer of energy within matter
Conductor: This is a material which easily transfers energy by means of electron movement
Convection: This is related to energy transfer within gases and liquids
Critical angle: This is the angle of incidence which occurs which light is refracted at 90 degrees to the normal
Direct current: Current that flows in only one direction
Efficiency: A number or a percentage which represents the ratio energy output to energy input
Electric current: The rate at which electric current flows- unit of measurement is amperes, using the symbol A.
Electron: A subatomic particle which is negatively charged
Equilibrium: An object has equilibrium when it is in a state of rest
Force: That which places a push or pull on an object
Frequency: The rate at which a wave passes a particular point every second
Friction: The force which opposes the movement of a surface over another surface
Fuse: A safety device which contains a wire which melts when too much current passes through it
Gravitational Potential Energy (GPE): That energy which can be attributed to an object’s mass due to its height above the ground.
Hooke’s Law: The extension of a spring is directly proportional to the force applied provided the spring’s limit of proportionality is not exceeded
Kinetic energy: The energy generated by a moving object measured in joules
Longitudinal wave: A wave in which the vibrations of same are in parallel to the direction of the energy transfer.
Mass: The amount or quantity of matter evidenced in an object measured in kilograms (kg)
Ohm’s Law: The current passing through a resistor is directly proportional to the voltage across the resistor. V = I x R
Potential Difference: The unit of measurement for potential difference (pd) is the VOLT (V) and is a measurement of the energy transferred by each coloumb of charge that passes through a conductive material.
Power: The unit of measurement for power is the WATT (W)B and represents the mount of energy transferred every second.
Resistance: The unit of measurement for resistance is the OHM () and represents the opposition to the flow of electric current
