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Engineering Revision (Material properties (Toughness (A material…

- - - - Produces an output signal when both signals are 1
    - - Output signal opposite to input signal
      - Used to turn an output device off when a switch is switched on.
    - - High output if any output signal is high
  - - - Current amplifier. Used for lamp and buzzers
  - - - Changes temperature level that is detected into a resistance
      - Resistance decreases, temperature increases
    - - Special type of variable resistor
      - Changes light level detected into a resistance
      - Light level decreases as brightness increases
- - - - Alloy made of Tin and Copper
    - - Molten pewter poured into mould
        
        Mould is split open and hand tools are used to remove waste.
  - - - Use a wire-brush to clean the carbon then heat to cherry red again
        
        Quench in water
- - - - Stiff, hard but scratches easily, brittle in sections
      - Signs, covers of storage boxes, wash basins, baths
    - - Hard, stiff
      - Plastic bottles, tubing, household equipment
  - - - Stiff, hard, strong, brittle, insulator
      - Plugs, handles
    - - Stiff, hard, strong, resists some chemicals
      - Tableware, electrical insulation