P1

P1

1. Heat and temperature

   • ET- Hotter to colder body
   • Temperature = Hotness, Arbitrary scale, C
     • Energy= Energy Transfer, Absolute Scale, J
   • ET= Mass x SHC x Temp Change
     • Change in Temp
   • ET= Mass x SLH
     • Change in state

2. Energy Transfer

   • Home
     • Double Glazing, Insulation etc..
     • Shiny surfaces reflect infrared
       • Reduces enerygy transfer
   • Sankey Diagrams
   • Efficiency= Usefull output/ total imput x 100
   • Conduction in solid transfers KE
     • Air insulator
   • Convection caused by density change
     • Trapped air reduces

3. Waves Transfer Energy

   • Wave Speed = Frequency x Wavelength
     • Energy of wave increases as length decreases
   • Electromagnetic Spectrum
     • Radiowaves  Microwaves Infrared  Visible light  Ultraviolet  X-Rays  Gamma rays 
   • Microwaves
     • Cooking
       • Infrared
     • Communication
   • Digital and Analogue Signals
     • Digital Clearer
       • Many at same time

4. The Stable Earth

   • Earthquake waves travel through Earth
   • UV Causes Cancer
   • CFC's ozone thinner