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133134
Physics 1
Descrição
GCSE Physics Mapa Mental sobre Physics 1, criado por leahon em 15-06-2013.
Sem etiquetas
physics
physics
gcse
Mapa Mental por
leahon
, atualizado more than 1 year ago
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Criado por
leahon
mais de 11 anos atrás
78
1
0
Resumo de Recurso
Physics 1
Energy
Heat Transfer
Radiation
No particles are needed
Infra red
E.g. Sun heats Earth
Black dull surfaces emit and absorb better
Shiny silver absorb and emit poorly
Conduction
Good in solids
As there tight particles, particles vibrate into each other
Especially good in metals as free electrons
Convection
Only in gases and liquids
As particles move so they collide more, less dense therefore rise
Flasks
Vacuum
No conduction or convection
Lid
No convection
Shiny outside
Stops radiation
Evaporation & Condensation
Evap.
Average speed= High
Fast molecules leave
Average speed= Low
E.g. Sweating
Conden.
Gas changes to a liquid
Energy
Insulation
Have to say whether stopping condu. convec. or rad.
Stops Conduction
As air is very poor conductor
Stops convection
As air is trapped
U values
Low u- value
Better Insulation
Energy transferred per second per square metre when the temperature difference is 1 degree celsius
Heat moves from hotter to colder
Specific Heat Capacity
Water= 4200 Joules per kg degrees celsius
Land= 800 J/Kg ^C
Energy= Mass x SHC x Temp. Change
Types
Kinetic
Elastic Potential
Heat
Electrical
Sound
Light
Nuclear
Chemical
Gravitational
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