hardness definition

  • noun:
    • the high quality or problem to be tough.
    • The general opposition of a mineral to scratching, as calculated by the Mohs scale.
    • The relative weight of a metal or any other material to denting, scratching, or bending.
    • The quality of being tough.
    • an example for this quality; difficulty.
    • The quality or state to be hard, actually or figuratively.
    • The cohesion of this particles on top of a body, decided by its capacity to damage another, or perhaps it self scraped; -- sized among nutrients on a scale of which diamond and talc form the extremes.
    • The unusual high quality displayed by water which has mineral salts dissolved inside it. These types of liquid types an insoluble mixture with soap, and is hence unfit for washing purposes.
    • The state or top-notch becoming tough, in just about any of senses of the word; solidity; density; difficulty of comprehension, accomplishment, control, or stamina; obduracy; harshness; seriousness; inclemency; adversity; roughness; uncomeliness; desire of sensibility.
    • especially That quality in fountain-water which is imparted by the existence more than earthy salts, specially calcium sulphate.
    • In medicine, that quality of the pulse which can be as a result of stress associated with the artery, that this condition cannot easily produce on stress for the little finger.
    • In art and songs, harshness or coldness of execution; unsympathetic treatment, at the time of a tone and/or information on a picture; want of feeling in overall performance.
    • In mineralogy, the relative capability of a substance to scratch another or be scratched by another; the quality of systems which allows all of them to resist abrasion of their areas.
    • liquid, as present in nature, containing salts of lime or magnesia or these two in substantial amount, is said to be hard; it curdles or precipitates soap bv forming insoluble lime or magnesia salts associated with the efas. Any lime or magnesia contained in the condition of carbonate is held in answer by carbonic-acid, while this latter is driven off as carbon-dioxid gas by boiling water, the natural carbonates are precipitated, so the liquid is always to this extent softened. The area of the original hardness that is thus detachable by boiling is called short-term hardness. The component because of calcium or magnesium into the condition of chlorid or sulphate is not hence detachable, and is called permanent hardness. The sum of the short-term and permanent stiffness constitutes the sum total hardness. Hardness is frequently claimed in degrees, each degree representing hardness equal to that caused by 1 whole grain of calcium carbonate in 1 imperial gallon of water; or, now additionally, 1 section of calcium carbonate in 1,000,000 elements of liquid.
    • the property of being rigid and resistant to force; maybe not quickly scratched; assessed on Mohs scale
    • devoid of passion or sensation; hardheartedness
    • a good of water which contains dissolved mineral salts that prevent detergent from lathering
    • the grade of being difficult to do
    • extortionate sternness

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