CORE PHYSICS AQA

Raegan Michelle
Mind Map by Raegan Michelle, updated more than 1 year ago
Raegan Michelle
Created by Raegan Michelle over 6 years ago
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I just need to remember some stuff

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CORE PHYSICS AQA
  1. ENERGY
    1. HEAT RADIATION
      1. Heat is transferred in three different ways; radiation, conduction, or convection.
        1. Infrared radiation is the emission of elecromagnetic waves
          1. Radiation depends on an awful lot on surface colour and texture
          2. KINETIC ENERGY AND CONDUCTION
            1. Kinetic energy can explain three states of matter
              1. Conduction of heat occurs mainly in solids
                1. Metals are good conductors because of their free electrons
                2. CONVECTION
                  1. Convection of heat - liquids and gases only
                    1. CONVECTION CURRENTS are all about CHANGES IN DENSITY
                    2. CONDENSATION AND EVAPORATION
                      1. Condensation is when gas turns to liquid
                        1. Evaporation is when liquid turns to gas
                          1. Rates of Evaporation and Condensation can vary
                            1. THE RATE OF EVAPORATION/CONDENSATION WILL BE FASTER IF:
                              1. EVAPORATION
                                1. Temperature is higher
                                  1. The average particle energy will be higher, so more particles will have enough energy to escape
                                  2. Density is lower
                                    1. The forces between the particles will usually be weaker, so more particles will have enough energy to overcome these forces and escape the liquid
                                    2. Surface area is higher
                                      1. More particles will be near enough to the surface to escape the liquid
                                      2. Airflow over the liquid is greater
                                        1. The lower the concentration of an evaporating substance in the air it's evaporating in to, the higher the rate of evaporation
                                          1. A greater airflow means air above the liquid is replaced more quickly, so the concentration in the air will be lower
                                      3. CONDENSATION:
                                        1. Temperature of the gas is lower
                                          1. The average particle energy in the gas is lower, so more particles clump together and form liquid droplets
                                          2. Temperature of the surface the gas touches is lower
                                            1. Density is higher
                                              1. The forces between these particles will be stronger. Fewer particles will have enough energy to overcome these forces and will instead clump together to form a liquid
                                              2. Airflow is less
                                                1. The concentration of the substance in the air will be higher, so the rate of condensation will be lower
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