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EDEXCEL PAPER 1 DEFINITIONS (A-LEVEL PHYSICS) QUESTIONS 100% GUARANTEED SUCCESS

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EDEXCEL PAPER 1 DEFINITIONS (A-LEVEL PHYSICS) QUESTIONS 100% GUARANTEED SUCCESS

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Superposition


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The effect of two waves adding together when they meet




Potential energy


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the energy of an object due to its position




Work

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force x distance moved in direction of force




Weak interaction


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Interaction between two leptons and between a lepton and a hadron. (e.g.
electron capture)




Excitation


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process where an atom absorbs energy (a photon) causing an electron to
go up an energy level




Stopping distance


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Thinking distance + braking distance




Systematic error

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Error of measurement due to readings that systematically differ from the
true mean reading and follow a pattern (trend or bias)




Pion (or π meson)


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a meson that consists of an up or down quark and an up or down antiquark.




Angular frequency (ω)


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for an object oscillating at frequency in simple harmonic motion, its angular
frequency = 2pif




Frequency


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number of oscillations per second




Thinking distance

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Distance travelled between when the driver sees a problem and the time at
which the brakes are applied.
(Reaction time is dependent on tiredness, alcohol or drug use, illness and
distractions.)




Nuclide


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a type of nucleus with a specific number of protons and neutrons.




Baryon


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Hadron with 3 quarks




Base units


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Units that define the SI system (e.g., the metre, the kilogram, the second,
the ampere)

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