Here you will find one or more explanations in English for the word hardness.
Also in the bottom left of the page several parts of wikipedia pages related to the word hardness and, of course, hardness synonyms and on the right images related to the word hardness.
Hardness
Hardness Hard"ness, n. [AS. heardness.]
1. The quality or state of being hard, literally or
figuratively.
The habit of authority also had given his manners
some peremptory hardness. --Sir W.
Scott.
2. (Min.) The cohesion of the particles on the surface of a
body, determined by its capacity to scratch another, or be
itself scratched;-measured among minerals on a scale of
which diamond and talc form the extremes.
3. (Chem.) The peculiar quality exhibited by water which has
mineral salts dissolved in it. Such water forms an
insoluble compound with soap, and is hence unfit for
washing purposes.
Note: This quality is caused by the presence of calcium
carbonate, causing temporary hardness which can be
removed by boiling, or by calcium sulphate, causing
permanent hardness which can not be so removed, but may
be improved by the addition of sodium carbonate.
Meaning of hardness from wikipedia
- In
materials science,
hardness (antonym: softness) is a
measure of the
resistance to
localized plastic deformation, such as an
indentation (over an area)...
- The Mohs
scale (/moʊz/ MOHZ) of
mineral hardness is a
qualitative ordinal scale, from 1 to 10,
characterizing scratch resistance of
minerals through the...
- benefits. It can pose
critical problems in
industrial settings,
where water hardness is
monitored to
avoid costly breakdowns in boilers,
cooling towers, and...
- The
Vickers hardness test was
developed in 1921 by
Robert L.
Smith and
George E.
Sandland at
Vickers Ltd as an
alternative to the
Brinell method to measure...
- The
Brinell hardness test (pronounced /brəˈnɛl/)
measures the
indentation hardness of materials. It
determines hardness through the
scale of penetration...
- The
Rockwell hardness test is a
hardness test
based on
indentation hardness of a material. The
Rockwell test
measures the
depth of
penetration of an indenter...
-
Vickers Hardness,
Rockwell Hardness,
Superficial Hardness,
Knoop Hardness,
Scleroscope Hardness, and Leeb
Hardness" (2019)
Hardness Conversion Table – Brinell...
- The
Janka hardness test (English: /ˈdʒæŋkə/; German: [ˈjaŋka]),
created by Austrian-born
American researcher Gabriel Janka (1864–1932),
measures the resistance...
-
hardness of
approximation is a
field that
studies the
algorithmic complexity of
finding near-optimal
solutions to
optimization problems.
Hardness of...
-
engineering and metallurgy, hot
hardness or red
hardness (when a
metal glows a dull red from the heat)
corresponds to
hardness of a
material at high temperatures...
