Encyclopedia > Hardness

  Article Content

Hardness

In materials science, hardness is the characteristic of a solid material expressing its resistence to penetration, and by extension its power of penetration in softer materials. An object made of a hard material will scratch an object made of a softer material.

Hardness is usually measured on various scales, such as the Rockwell scale or the Mohs scale.

Pure diamond is the hardest known substance (on every scale), so it will scratch any other material. Diamond, being the hardest material, is the substance used to cut diamond.

See also:

External links



All Wikipedia text is available under the terms of the GNU Free Documentation License

 
  Search Encyclopedia

Search over one million articles, find something about almost anything!
 
 
  
  Featured Article
List of intelligence agencies

... Agency (CIA) Defense Intelligence Agency (DIA) Federal Bureau of Investigation (FBI) National Security Agency (NSA) Naval Security Group[?] (NSG) Office of Strategic ...

 
 
 
This page was created in 33.2 ms