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Seawater, or sea water, is water from a sea or ocean. On average, seawater in the world's oceans has a salinity of about 3.5% (35 g/L, 35 ppt, 600 mM). This means that every kilogram (roughly one liter by volume) of seawater has approximately 35 grams (1.2 oz) of dissolved salts (predominantly sodium ( Na +
In the oil industry, mud weight is the density of the drilling fluid and is normally measured in pounds per gallon (lb/gal) (ppg) or pound cubic feet (pcf) . [1] In the field it is measured using a mud scale or mud balance. Mud can weigh up to 22 or 23 ppg. A gallon of water typically weighs 8.33 pounds (or 7.48 ppg).
Sigma-t is a quantity used in oceanography to measure the density of seawater at a given temperature. [1] σ T is defined as ρ(S,T)-1000 kg m −3, where ρ(S,T) is the density of a sample of seawater at temperature T and salinity S, measured in kg m −3, at standard atmospheric pressure.
Due to the higher density of sea water (1,030 kg m −3) than air (1.2 kg m −3), the force exerted by the same velocity on an organism is 827 times stronger in the ocean. When waves crash on the shore, the force exerted on littoral organisms can be equivalent to several tons.
Exterior latex house paints may also be a co-polymer blend, but the best exterior water-based paints are 100% acrylic, because of its elasticity and other factors. Vinyl, however, costs half of what 100% acrylic resins cost, and polyvinyl acetate (PVA) is even cheaper, so paint companies make many different combinations of them to match the market.
A density cup is an instrument that is used to ensure quality control in a paint or lacquer. [1] It does this by measuring the density of the paint or lacquer, and comparing this density with the density of a standard for that paint or lacquer. [ 2 ]
Glidden is an American paint brand, manufactured by PPG Industries. Glidden was purchased by British conglomerate ICI in 1986, which in turn was later acquired by Dutch conglomerate AkzoNobel in 2008. PPG Industries announced an agreement to acquire Glidden from
The density ratio of a column of seawater is a measure of the relative contributions of temperature and salinity in determining the density gradient. [1] At a density ratio of 1, temperature and salinity are said to be compensated : their density signatures cancel, leaving a density gradient of zero.