physics

physics

1. solids

   • strong forces of attraction
   • fixed position
   • all touching
   • no space between the particles
   • cannot be compressed

2. liquids

   • 75% touching
   • cannot be compressed
   • weak forces of attraction
   • can flow
   • can change shape
   • can pe poured

3. gases

   • none touch
   • rapid,random motion
     • Flow
   • no force of attraction
   • a lot of space between particles
   • no pattern

4. heating curves

   • the plot of temperature
   • shows changes of state
   • you can read the melting and boiling points
   • temperature of the substance against the amount of energy it has absorbed

5. Specific latent heat of fusion

   • The amount of energy needed to melt 1kg of a solid into a liquid without changing its temperature

6. Specific latent heat of vaporisation

   • The amount of energy needed to boil 1kg of a liquid to a gas without changing its temperature

7. Sublimation Melting. Boiling Solid, liquid, gas Freeze,condense Depostion

8. Mass = densityXvolume

9. E=mxL

10. Specific heat capacity

    • Amount of energy needed to change 1kg of a substance by 1 degrees

11. P1V1=P2V2

12. Energy cannot be created or destroyed ,it can only be transferred from one store to another

13. pathway examples

    • The sun has a store of nuclear energy which reaches the solar cells through a radiation pathway.
    • The energy is stored in a battery when the machine is used some energy is wasted this happens through a heating pathway.

14. eqations

    • ep = m x g x h
    • ee = 1/2 x k x exe
    • ek = 1/2 x m x vxv
    • wd = f x d
    • p = wd divided by t