Physics 1

Physics 1

1. Heat

   • Energy= Mass x SHC x Temp Ch
   • SLH - Energy into Ch state
   • Conduction in solids, vibrations
   • Convecton in liquids + gasses, move from hot to cold
   • Radiation, doesn't need materials

2. Heat Energy

   • Insulation, heat in air pockets
   • Thermograms
   • Efficiency = useful output / total input
   • Sankey Diagrams

3. Waves

   • amplitude, wavelength, crest, trough
   • Speed= Frq x WL
   • Diffraction
   • refraction - changing direction
   • types... R M I V U X G
   • Lasers, waves at same freq

4. Communication

   • Infrared
     • Remotes
     • Security
     • Monitor Temp
   • Radio Waves + Microwaves - Long Distance
   • Diffraction can effect signal stregnth
   • Analogue signals vary, Digital is On or Off

5. Waves and the Enviroment

   • UV (from the sun) causes skin cancer
     • The Ozone layer protects us
   • (n)SPF sun creams = (n) x longer in the sun
   • Seismic Waves
     • P-waves are longditudinal
     • P Waves travel in the direction of the wave
     • S-Waves are transvers
     • The vibrations travel up and down

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