Physics P1
- Created by: kelanatkinson
- Created on: 01-01-15 18:10
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- Physics P1
- Specific heat capacity is the energy needed to raise the temperature of 1kg by 1degC.
- Energy transferred= mass X specific heat capacity X temperature change.
- Specific Latent Heat is the energy needed to melt/boil 1kg of material.
- Insulation:
- Double Glazing: Prevents CONDUCTION by creating a vacuum or filling a gas between two panes of gas, preventing particle heat transfer.
- Loft Insulation
- Wall Cavity
- Energy Transfer:
- Conduction: Transfer of kinetic energy between particles.
- Convection: Hot air is less dense than cold, thus rises, transferring heat around the room.
- Radiation, energy transferred by Infrared Waves.
- Energy Efficiency:
- efficiency= useful energy output / total energy input [X100%]
- payback time= total costs on insullation / annual saving.
- Specific heat capacity is the energy needed to raise the temperature of 1kg by 1degC.
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