water hardness
11hard water — water that contains magnesium, calcium, or iron salts and therefore forms a soap lather with difficulty. * * * Water that contains mineral salts of calcium and magnesium, principally as bicarbonates, chlorides, and sulfates, and sometimes iron.… …
12hardness — /hahrd nis/, n. 1. the state or quality of being hard: the hardness of ice. 2. a relative degree or extent of this quality: wood of a desirable hardness. 3. that quality in water that is imparted by the presence of dissolved salts, esp. calcium… …
13water softener — n. device attached to a water system for removing hardness from water; substance that reduces hardness of water …
14water softener — /ˈwɔtə sɒfənə/ (say wawtuh sofuhnuh) noun any substance or device for destroying the hardness of water, usually by causing the precipitation, or removal from solution, of the metals whose salts cause the hardness …
15hardness of water — vandens kietumas statusas T sritis ekologija ir aplinkotyra apibrėžtis Vandens savybė, kurią lemia kalcio Ca²⁺ ir magnio Mg²⁺ jonų kiekis jame. Pagal kietumą vanduo skirstomas į: minkštą (kietumas<4 mmol/l), vidutinio kietumo (4–8 mmol/l),… …
16hardness of water — vandens kietumas statusas T sritis Energetika apibrėžtis Vandens savybė, atsirandanti dėl kalcio ir magnio jonų vandenyje. Šildant vandenį, kietumo druskos išsiskiria nuovirų pavidalu, todėl blogina šilumos mainus. Tokios nuoviros prastina… …
Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas
17hardness — 1. The degree of firmness of a solid, as determined by its resistance to deformation, scratching, or abrasion. SEE ALSO: h. scale, number. 2. The relative penetrating power of a beam of x rays, used both within the diagnostic range of …
18hardness — noun 1. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale • Ant: ↑softness • Derivationally related forms: ↑hard • Hypernyms: ↑consistency, ↑consistence, ↑eubstance, ↑ …
19water softener — noun a substance (such as sodium chloride) that lessens the hardness of water by replacing calcium and magnesium ions with sodium ions and so gives the water more efficient sudsing power • Hypernyms: ↑softener • Hyponyms: ↑zeolite * * * ˈwater… …
20hardness — hard ► ADJECTIVE 1) solid, firm, and rigid; not easily broken, bent, or pierced. 2) requiring or demonstrating a great deal of endurance or effort; difficult. 3) (of a person) not showing any signs of weakness; tough. 4) (of information or a… …
