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Physics Paper 1, Key - Coggle Diagram

- - - - Movement
        
        Equation: K=0.5xmv^(2)
    - - From raised objects and falling objects
        
        Equation: E = mass x gravitational field strength x height
  - - - How much energy is required to increase temp of 1kg of material by 1 degree celcius
  - - - Heating a room relies on create convection currents in the air
      - Energy is transferred from the radiator to the nearby air particles by conduction
      - The air next to the radiator becomes warmer and less dense (particles quicker)
      - The warm air rises and is replaced by cooler air
      - This repeats causing a convection current. A flow of air to circulate around the room
  - - - Solar
        
        Solar cells in panels absorb suns light to generate elecricity
        
        Cons
        
        Expensive
        
        Land usage (take up lots of land)
        
        Efficiency (doesn't work at night) (hard to store energy)
        
        Pros
        
        Is renewable so never runs out
        
        No greenhouse gas emisions
        
        Low Maintanence
      - Wind
        
        Wind turbines spin in the wind, turning a generator which "generates" electricity
        
        Pros
        
        Is renewable so never runs out
        
        No greenhouse gas emisions
        
        Cheap
        
        Cons
        
        Visual Impact (don't look nice)
        
        Noise Pollution
        
        Land usage (take up lots of land)
      - Geothermal
        
        harnesses the Earth's internal heat to produce electricity
        
        Cons
        
        Can only be used in suitable locations e.g. Iceland
        
        Very expensive
        
        Risks of triggering earthquakes
        
        Pros
        
        Very Reliable
        
        Is renewable so never runs out
        
        No greenhouse gas emisions
      - Biomass/Biofuel
        
        Plants and animals: converting organic materials—such as plant matter, agricultural residues, and animal waste—into electricity or fuel. This process can include direct combustion
        
        Cons
        
        Expensive
        
        Uses a lot of land to grow crops for biofuel
        
        Combustion releases carbon dioxide still
        
        Pros
        
        Renewable energy
        
        Less greenhouse gas emissions
        
        Reduces waste of animals and plants
      - Hydro electric
        
        Dam. the process of converting the energy of flowing or falling water into electricity. This is typically achieved by using a dam to create a reservoir, where water is released to turn turbines connected to generators.
        
        Cons
        
        Enviromental impact (fish)
        
        High Costs
        
        Depends on water flow
        
        Pros
        
        Renewable
        
        Reliable
        
        No greenhouse gas emisions
      - Tidal
        
        No one cares, just there if u need one more
        
        Use generators from waves in ocean
      - never run out duh
    - - Fossil Fuels
        
        Coal
        
        Oil
        
        Gas
        
        Are very reliable; most energy comes from it when demand increases
        
        Releases greenhouse gases
        
        Greenhouse effect is the blanket of CO2, Methane etc covering the atmosphere trapping heat in the atmosphere which increases global temperatures
      - Will eventually run out duh
      - Nuclear Energy