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.
A new material with a higher melting point than any other known substance has been invented by scientists. The exotic alloy, which is a combination of the rare metal hafnium, carbon and nitrogen, would only begin to melt into a liquid at temperatures of more than 4,126Â°C (7,460Â°F) - two thirds the temperature of the surface of the sun.