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Renewable energy sources will not run out. They also do less damage to the environment.
1. Coal
2. Oil
3. Natural Gases
4. Nuclear Fuels
2) What 2 fuels are used in nuclear power?
Heat and Steam.
6)How are Biofuels produced?
Biofuels are produced by dead plants and waste.
15)What is refraction?
Refraction is waves changing direction when entering a new material.
When a wave crosses an interface between two substances, like from air to water, it changes direction.
When light shines on a glass window pane, some of the light is reflected, but a lot of it passes through the glass and gets refracted as it does so.
As the light pass from the air into the glass it bends '(Refracts)' towards the normal.
When the light reaches the 'glass to air' boundry on the other side of the window, it bends (refracts) away the normal.
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