How to reduce conduction
- Wear leather gloves can be worn that insulate the hands and reduce heat loss on a cold day to a metal hand rail.
- Insulation is used in the roof between the tin roof and the ceiling space to reduce heat transfer
How to reduce convection
•Rubber door skirts-prevent the movement of air, cold air is prevented from flowing to either cool or heat the house.
How to reduce Radiation
- Verandah-are used to provide shade in summer and let in light during winter when the sun is low.
- Deciduous trees- provide shade in summer and allow light in winter when the leaves drop to the ground.
Energy efficient design
- Double Glazing- 2x glass layers with vacuum, prevents conduction.
- Wall and Roof insulation-Prevents conduction
- Solar heating-large north facing windows, allow winter sun in +radiate heating.
- Large verandahs-Provides shade during summer.
- Door skirts/snakes-Prevent conduction heat loss stoped.
- Large windows- Natural light reduces electricity for lighting.
Types of light
- Gamma Rays
- X-Rays
- UV Rays- Ultra Violet
- Visible Lighting- Rainbow
- Infrared
- Microwaves
- Radio Waves
Stored potential energy + description
Gravitational-Energy stored in mass a height above ground.
Chemical-Energy stored in chemical compounds.
Elastic-Energy stored in elastic materials.
Electric-Energy stored by batteries or provided by mains electricity.
Nuclear-Energy stored in the nucleus of atoms that make up all matter.
Energy types and description
- Kinetic-Energy of any moving mass or object.
- Heat-Warms, dries, melts, burns objects, a transfer of thermal energy.
- Light-Provides illumination, light bulbs, glow worms, Sun etc…
- Sound-Energy produced when an object vibrates and sound is heard.
Equation of Gravitational potential energy
Mass x acceleration due to gravity x height
GPE= MxGxH
What does gravity equal?
9.8
Number and prefix table
1 000 000 000 000 Tera,T 1 000 000 000 Giga,G 1 000 000 Mega,M 1 000 Kilo,K 0.01 Centi,C 0.001 Milli,M 0.000 001 Micro 0.000 000 001 Nano, N
How could energy be conserved in your everyday life
- You could open the curtains on your windows to let natural light in.
- Put a jumper on instead of the heater.
- Have shorter showers or use colder water.
What is the main issue of burning fossil fuels.
The issue of burning fossil fuels is that it effects our environment. When they are burnt green house gases are released causing global warming.
Explain the purpose of energy rating labels
This label appears on most appliances. It helps consumers buying products choose something that is the most energy efficient. The more stars the more efficent and the number tells you it’s energy consumption as kWh per year.
Calculating efficiency
Useful output energy divided input energy
X100
Stored potential energy types
Gravitational Chemical Elastic Electric Nuclear
Energy Types
Kinetic Heat Light Sound Electric
