Applied Science - B1

Applied Science - B1

1. Carbon Fibre

   • Low density
   • high elacsicity
     • high strength

2. clothing that will keep you cool

   • white reflects sunlight
   • woven material with small holes
     • allows sweat to evapourate

3. composite materials

   • moisture-transparent layers which allows sweat to escape easily
   • low thermal conductivity
   • outside layer must be waterproof

4. international standards

   • international organisations standardidastion (ISO)
     • experts from the industries that make products
     • experts from labs that test products
     • people who represent consumers

5. measurment

   • important for many sports
     • knowing the height of a hurdle
       • timing duration of races
       • finding the masses used in a weight-lifting contest

6. elastic behaviour

   • force constent k = force, F / extension, x
   • F=Kx
   • for small forces, the graph is always a straight line
     • plastic behaviour
       • many materials become plastic if force us big enough

7. Classes of materials

   • Metals
     • strong tension and compression
       • large forces needed to break them
       • tough; they deform rather than break suddenly under stress
     • hard; don't scratch or dent easily
   • Polymers
     • flexible
     • durable
     • light
   • ceramics
     • brittle
     • hard in tension
     • strong in compression