Hardness refers to various properties of matter in the solid phase that give it high resistance to various kinds of shape change when force is applied. Hard matter is contrasted with soft matter.
Hardnes of matter is its ability to resist being scratched. (only applies to solids.)
How resistant something is to being scratched or marked.
something that is rigid and resistant to pressure
some hard materials (esp gems and rocks) are measured on the Mohs scales as to how easily they are scratched
Ex.
Wood
Hammer
Rock
Hardness is better.
Pure materials, especially minerals, are measured on a hardness scale. There are three basic tests: indentation hardness, scratch hardness and rebound hardness. See Wikipedia
hardness, luster, cleavage and fracture, color (not quite useful) and streak
Hardness
use it to scratch other solid materials
Hardness is the ability of a mineral to resist being scratched. A diamond is the hardest mineral--which means that no other mineral can scratch it.
Hardness is the ability of a mineral to resist being scratched. A diamond is the hardest mineral--which means that no other mineral can scratch it.
Hardness is a characteristic that applies to a range of materials-metals and nonmetals alike- and is defined as the resistance of the material to deformation.
Hardness is better.
The properties in identifying minerals are color,luster,hardness,cleavage and fracture,and streak.
Hardness of ductile materials can be determined by following methods..... 1) Brinell Hardness Test 2)Vickers Hardness Test 3)Rockwell Hardness Test 4) Scratch hardness test
The term hardness is not adequate and important for carbon fibers; they are soft materials.
Pure materials, especially minerals, are measured on a hardness scale. There are three basic tests: indentation hardness, scratch hardness and rebound hardness. See Wikipedia
Two methods:- comparison with other materials with known hardness- using a special instrument to measure hardness
Streak and Mohs hardness are descriptive and identifying terms for minerals. Because sandstone could be composed of a multitude of different rock particles or minerals, a specific hardness or streak cannot be attributed to them.
hardness, luster, cleavage and fracture, color (not quite useful) and streak
Hardness