As water pressure changes, the volume of air in a bladder. pressure tank contracts and expands. Periodically, the amount. of air in the tank should be measured and the tank recharged if. the air is too low. Bladder pressure tanks do not provide any. useful water storage capacity.
Add Image. Exotic Materials are the strange and unusual elements produced by science, nature, or some strange alien force. Such materials could be alloys, isotopes, chemicals, and such.
Magnetic materials. Materials exhibiting ferromagnetism. The magnetic properties of all materials make them respond in some way to a magnetic field, but most materials are diamagnetic or paramagnetic and show almost no response.The materials that are most important to magnetic technology are ferromagnetic and ferrimagnetic materials.he quality of magnetic materials is continually being improved by using increasingly pure raw materials (charge materials) and by perfecting production processes (for example, heat-treating the materials in a protective medium and vacuum melting).