Flashcards
Defintions
Cards in this deck (79)
- 1AccelerationThe rate of change of velocity with respect to time
- 2Acceleration of free fallAcceleration of a body falling freely in a vacuum close to the earth's surface
- 3Air resistanceForce of air pushing against an object moving through it - a frictional force
- 4AmplitudeThe maximum displacement from a wave's resting position
- 5The moment of a forceThe product of the force and the perpendicular distance between the axis of rotation and the line of action of the force
- 6A coupleA pair of forces, equal in magnitude but opposite in direction, whose lines of motion do not coincide
- 7Centre of gravityThe point on an object through which the entire weight of the object may be considered to act
- 8PressureForce acting per unit area
- 9Angle of incidenceThe angle which an incident line or ray makes with a perpendicular to the surface at the point of incidence
- 10Angle of reflectionThe angle made by a reflected ray with a perpendicular to the reflecting surface
- 11Angle of refractionThe angle made by a refracted ray with a perpendicular to the refracting surface
- 12Archimedes principleStates that the upthrust experienced by an object partially or entirely immersed in a fluid is equal to the weight of the fluid displaced by the object.
- 13Average speedAverage distance travelled divided by total time taken. (scalar)
- 14Average velocityAverage distance travelled divided by total time taken. (vector)
- 15Base unitThe five SI units that can be combined to create different units of measurement
- 16Braking distanceDistance taken to stop once the brakes have been applied.
- 17Breaking strengthThe greatest stress that a material can withstand without rupture
- 18BrittleWhen the material is subject to stress, it cracks without significant deformation
- 19Centre of massA point that represents the mean position of the matter in a body.
- 20CoherenceWhen the phase difference between waves is constant
- 21CompressionA region in a longitudinal wave where the particles are closest together
- 22Compressive forceA force which compresses/shortens a material
- 23Conservation of chargeThe principle that the total electric charge of a system is constant.
- 24Constructive interferenceWhen 2 or more waves of equal frequency and phase superpose and their amplitudes are added together to result in a large total amplitude.
- 25Destructive interferenceWhen 2 or more waves of equal frequency but opposite phase superpose and the negative displacement of one coincides with the positive displacement of the other, cancelling out and resulting in no total amplitude.
- 26CoulombSI unit for charge - the quantity of charge transferred across a conductor in which there is a constant current of 1 ampere.
- 27Critical angleThe minimum angle of incidence beyond which total internal reflection occurs for light traveling from a medium of higher to one of lower index of refraction
- 28De Broglie's equationThe idea that a moving object will have wave particle properties:
- 29DensityMass per unit of volume
- 30Derived UnitA unit of measurement found using the equation of a quantity involving base units
- 31DiffractionThe bending of waves, especially sound and light waves, around obstacles in their path.
- 32Diffraction gratingA band of equidistant parallel lines rules on glass or a polished metal surface, used to diffract light to create optical spectra.
- 33DiodeAn electronic component that only allows current to flow in one direction.
- 34DisplacementThe linear or angular distance in a given direction between a body or point and a reference position.
- 35Drag forceResistive forces acting in the opposite direction to the movement of an object travelling through a fluid.
- 36DuctileA material that can be drawn into wires, is able to undergo deformation without breaking.
- 37Efficiencythe ratio of the work done or energy developed by a machine to the energy supplied to it.
- 38Elastic deformationThe temporary change in length, volume, or shape produced in an elastic substance by a stress that is less than the elastic limit of the substance.
- 39Elastic limitThe greatest stress that can be applied to an elastic body without causing permanent deformation.
- 40Elastic potential energyPotential energy stored as a result of the deformation of an elastic object.
Equal to the energy used to stretch the object. - 41Electric chargeAmount of electricity (in coulombs) travelling through a circuit.
- 42Electric currentThe rate of flow of charge with respect to current.
- 43Electromagnetic spectrumThe range of frequencies and wavelengths of electromagnetic radiation
- 44Electromagnetic wavesA wave produced by the acceleration of an electric charge
- 45Electromotive forceThe energy provided per coulomb of charge by a cell or battery. Measured in Volts and is equal to P.D. across terminal when no current is flowing.
- 46Electron gunA device for producing a narrow stream of electrons from a heated cathode.
- 47Electronvolta unit of energy equal to the work done on an electron in accelerating it through a potential difference of one volt.
- 48Elementary chargeThe charge carried by a single proton - Electrons carry the same, negative charge.
- 49EnergyThe capacity of a physical system to do work.
- 50EquilibriumWhen all the forces acting on an object cancel each other out, so there is no net force acting on the object.
- 51Equilibrium positionThe rest position of the wave, when it is not oscillating.
- 52ExtensionThe change in length
- 53Filament lampa
- 54Fluida
- 55Forcea
- 56Force constanta
- 57Force-extension grapha
- 58Force-extension grapha
- 59Force-time grapha
- 60Free electrona
- 61Free fallaa
- 62Free-body diagrama
- 63Frequencyaa
- 64Fundamental frequencya
- 65Gold leaf electroscopea
- 66Gradientaa
- 67Grating equationaa
- 68Grating spacingaa
- 69Gravitational field strengtha
- 70Gravitational potential energyD
- 71Harmonica
- 72Hooke’s lawa
- 73Impulsev
- 74Inelastic collisiona
- 75Infrared wavesa
- 76Intensitya
- 77Interferencea
- 78Internal resistancea
- 79Iona
Information
- Description
- Flashcards on Defintions, created by Sarah Jackson on 03/05/2016.
- Created by
- Sarah Jackson
- Views
- 0
- Rating