AQA Physics P1

The basics of P1 - Information from the AQA specification

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  • Created by: AstonC99
  • Created on: 15-12-14 16:51
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  • Physics P1
    • Heat
      • Infared Radiation
        • Everything emits and absorbs infared raditation
        • Matt Black- Best absorber and emmiter
        • Shiny silver, Best reflector.
      • Conduction
        • Happens in Solids and Liquids
          • Particles vibrate and cause collisions with other particles transferring heat
      • Convection
        • When heated particles move to a cooler area taking heat with them
      • What affects the rate of emmiting
        • Larger surface area
        • A larger difference between the air and the object
      • Insulators
        • Fiberglass, foam filled cavity walls
        • U-Value
          • How good an insulator an object is
          • Lower U-Value = better insulator
      • Specific heat capacity
        • Amount of energy need to heat object by 1 degree
        • Energy (J) = Mass (G) x Specific heat capacity (C, J/Kg) x Temperature change (Epilision, Degrees)
      • Energy (J) = Power (Watts, W) x Time ( Seconds, s)
      • Efficiency
        • Amount of energy useful over used
        • Used energy / total energy
        • Can be shown on a sankey diagram
        • Waste energy
          • Transfered to surroundings
          • "Destroyed"
    • Generating energy and distribution
      • Ways of generating
        • Renewable
          • Water, Wind , Tidal, Hydroelectric, Solar
            • Things to mention
              • When can they be used(E.g At night , only in sun, only in wind...)
              • Noise, Sight pollution
        • Non-renewable
          • Coal, Oil, Gas
            • Releases Coal- C02, S02 Oil- C02
          • Can't be used again
        • Power stations
          • 1. Steam from heat released from burning fuel turns turbine. 2. Turbine turns generator, 3. Generator creates electricity 4. Generator sent to national grid
        • Nuclear
          • Uranium, Plutonium
            • Takes a lot to get rid of the waste
              • Untitled
      • Untitled
      • National grid
        • Step up transformers = + voltage and less current = less energy lost
          • Step down= So electricity can be used by appliances
    • Waves
      • Transverse
        • Light and electromagenetic spectrum
          • Gamma, X-Ray, Ultraviolet, Visible, Infared, Microwave, Radio Wave
            • ----------------->> Increase in wavelength
              • Untitled
        • Energy transfer perpendicular to direction of movement
      • Longitudinal
        • Uses compression and rarefraction
          • Sound
          • Transfer of energy parraele

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