AQA Physics Unit 2 (P2) Mindmap

Physics Unit 2 mindmap!

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  • Created by: Triciaaa
  • Created on: 05-01-13 17:01
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  • Physics Unit 2
    • Forces and their effects
      • Thinking distance - drugs, alcohol, tiredness
      • Braking distance - adverse road conditions, weather, tyres
      • Velocity time graph: acceleration = gradient, distance = area
      • Distance time graph: speed = gradient (d/t)
    • Kinetic energy of objects speeding up or down
      • Work done = when a force causes an object to move
      • Momentum p=mv (p is momentum kg m/s)
      • Safety with momentum = increase in time, decrease change in momentum, less force exerted
    • Currents in an electrical circuit
      • pd - energy transferred per coloumb of charge between 2 points
      • LED = uses small currents, remote controls
      • LDR = light, decrease dark, increase
      • Thermistor - temp   = hot- drops,cold-goes up
    • Mains electricity
      • RCCB - Residual Current Circuit Breaker
      • Fast sensitive resettable
      • bigger than fuse, expensive
      • AC: Amplitude: no. of squares (up) x ygain unit
      • AC: Time period: no. of squares (across) x time unit
      • DC: pd: no. of squares (up) x ygain unit
    • Radioactive substances
      • background radiation cosmic, radon, rocks, nuclear weapons and tests
      • Alpha
        • weak penetration
        • strong ionising
        • short range
      • Beta
        • moderately ionising
        • moderately penetrating
        • long range
      • Gamma
        • weak ionising
        • Strong penetration
        • large range in air
    • Nuclear fission and fusion
      • Fusion - doesnt produce radiactive waste
      • Fusion releases   more energy than fission
      • protostar,  main sequence, red giant, white, black
      • protostar,main  sequencestar, red super giant, supernova, neutron, hole

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