In the nature we have some potentials. What does it mean the potential ?
The difference in some circumstances (level of water or temperature).

See below

H is the difference of two water levels

If there are no difference anywhere, there are no changes, forces, etc.

If there is only difference of levels of water, there will be a big splash !
We recognize if we need to use the difference of level, we need some barrier to separate two levels.

See below - The job is made by the dam for two water levels.

n technics, physics and natural sciences we ask ourselves:
How to use the potential. Between two levels of water or between two objects with different temperatures.

to be continued

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