P2: Energy transfer by heating
- Created by: Aidan Bradley
- Created on: 02-11-17 17:11
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- P2: Energy transfer by heating
- P2.3: More about infrared radiation
- If the temperature on an object increases, it absorbs more than it emits
- The earths temperature depends on how much infrared the earth emits and the amount it abosrbs
- P2.1: Energy transfer by conduction
- Metals are conductors and non metals are insulators
- Thermal conductivity is the amount of energy a material conducts a second
- P2.2: Infrared radiation
- Everything emits infrared radiation
- The more infrared an object produces, the hotter it is
- Blackbody radiation is radiation the body emits to absorb all other radiation
- P2.4: Specific heat capacity
- The energy required to change the temperature by 1 degree
- E = m × c × ? E is the energy transferred in joules, J. m is the mass of the substances in kg. c is the specific heat capacity in J / kg °C ? (‘theta’) is the temperature change in degrees Celsius, °C
- P2.5: Heating and insulating buildings
- double-glazeing
- Insulation
- P2.3: More about infrared radiation
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