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geothermal doesnt use the suns energy in any way.
Birds have higher body temperatures then most mammals and because of this use a lot of energy. Maintaining body temperatures and flight are to things that birds do that require energy.
All energy sources come in two ways. One way is by something using the energy. The other way is by something producing the energy. We use thermal energy when we heat our homes with heaters. Microwaves and ovens use thermal energy. So do toasters.
The best way is to use a microphone.
Gravitational potential energy depends on the difference of height. If the length of the ramp is changed, but the endpoints have the same difference in height, there won't be any change in gravitational potential energy. If, on the other hand, the change is done in a way that the height does change, then gravitational potential energy will also change.
Living beings are, in a way, similar to engines, and they need fuel - for example, to move around, to grow, etc. Without energy, no change is possible. A lifeless statue doesn't need energy; anything that moves, grows, or undergoes any other type of change, does.
geothermal doesnt use the suns energy in any way.
Windmills are a good way to use wind energy
If you are happy with the way things are, then you will not feel a need for change. If you are unhappy with the way things are, then you will feel a need for change.
because the change either uses up enrgys, or the change absorbs energy in some way
You need to be taught to do this properly and you need a lot of practice. Basically you change up to go faster, but sometimes you change down for acceleration or for safety.
Birds have higher body temperatures then most mammals and because of this use a lot of energy. Maintaining body temperatures and flight are to things that birds do that require energy.
All energy sources come in two ways. One way is by something using the energy. The other way is by something producing the energy. We use thermal energy when we heat our homes with heaters. Microwaves and ovens use thermal energy. So do toasters.
Yes, energy is simply a way for things to change, therefore it is needed. Without energy flow (where energy is either gone or constant) a substance will remain the same.
The best way is to use a microphone.
Gravitational potential energy depends on the difference of height. If the length of the ramp is changed, but the endpoints have the same difference in height, there won't be any change in gravitational potential energy. If, on the other hand, the change is done in a way that the height does change, then gravitational potential energy will also change.
They use way to much energy, but what would we do with out google. :)