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He described how fire gave rise to the other elements as the: "upward-downward path", (ὁδὸς ἄνω κάτω), [3] a "hidden harmony" [4] or series of transformations he called the "turnings of fire", (πυρὸς τροπαὶ), [5] first into sea, and half that sea into earth, and half that earth into rarefied air.
The Greek philosopher Empedocles (c. 450 BC) was the first to propose the four classical elements as a set: fire, earth, air, and water. [9] He called them the four "roots" (ῥιζώματα, rhizōmata). Empedocles also proved (at least to his own satisfaction) that air was a separate substance by observing that a bucket inverted in water did ...
Usually, the relationship between mass and weight on Earth is highly proportional; objects that are a hundred times more massive than a one-liter bottle of soda almost always weigh a hundred times more—approximately 1,000 newtons, which is the weight one would expect on Earth from an object with a mass slightly greater than 100 kilograms.
Water element represents the quality of liquidity or relative motion. Any matter where relative motion of particles is in prominence are called water elements. Internal water elements include bile, phlegm, pus, blood, sweat, fat, tears, nasal mucus, urine, semen, etc. [10] Fire element (teja-dhātu) Fire element represents the quality of heat ...
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 +
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A likely example of naturally occurring supercritical water is in the hottest parts of deep water hydrothermal vents, in which water is heated to the critical temperature by volcanic plumes and the critical pressure is caused by the weight of the ocean at the extreme depths where the vents are located. This pressure is reached at a depth of ...
The water across the northern Atlantic Ocean becomes so dense that it begins to sink down through less salty and less dense water. (This open ocean convection is not unlike that of a lava lamp.) This downdraft of heavy, cold and dense water becomes a part of the North Atlantic Deep Water, a south-going stream. [32]