What are some situations applying Pascal's Principle.?

Answer 1

The most common situations are:
* the description of a hydraulic press
* the fact that pressure under a fluid increases with depth, be it atmospheric pressure (greater at sea level than on a mountain), water pressure (greater at the bottom of the ocean than near the top), etc.
* Water towers: the water is elevated so that the simple elevation difference between the tower and the building provides enough pressure for water use (be it for a tap, a shower, or a fire hydrant).