A biscuit
Beans can be consumed for energy and then, once digested, the resulting flatulence can be burnt to generate energy.
Any fuel that can be burnt has chemical energy. Once it is burned, that energy will of course be converted into heat energy.
it is renewable No pollution since nothing gets burnt. Reliable as theres 2 tides daily. cheap to run once built.
burnt once, then closed down, then reopened to our modern day.
Fossil fuel is bad because it is not reusable. Once we take all of it from the earth, there won't be any left. To make energy, the fossil fuels must be burnt. The smoke that is released after it is burnt has carbon dioxide and other chemicals that are harmful to nature.
The wood in the fireplace has more potential energy because it contains stored chemical energy that can be released through combustion. Once the wood is burned and converted into ashes, the potential energy is mostly depleted, leaving behind mostly inert material with minimal energy potential.
At the bottom, which you get to by going down the ladder once.
Fossil fuels are non-renewable. Once we've burnt them, they're gone!
The "elastic portion" is precisely the part where the material returns to its original shape, and thus returns its energy. Once the material does NOT return to its previous shape, it doesn't exert a force back to the original position, and there is no way to get the energy back.
Once coal has been burnt, it undergoes a chemical change and cannot be reversed back to its original state. The combustion process alters the composition of coal at a molecular level, making it impossible to revert to its pre-burnt form.
A CD-R can only be burnt on once,whilst a CD-RW is re-writable
the sun gives the energy to the plants, so that they will grow. then the animals (or humans) eat the plants. also, if the animal eats the plant, and we eat the animal, we are consuming that energy! its pretty simple once you think about it(: