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