This webpage has an overview of the science of pressure.
http://hyperphysics.phy-astr.gsu.edu/hbase/press.html
This article shows how tire pressure gauges work and how they show us how much air pressure is in our car tires.
https://auto.howstuffworks.com/pressure-gauge.htm
This video is a good overview of how water towers work and why we need them.
This reservoir in Britain uses water pressure to essentially become a battery for electricity.
