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Waterbody number. A waterbody number, waterbody index number or waterbody ID is used for the hydrographic classification of waterbodies. Where classification only covers bodies of flowing water such as rivers, it may be called a watercourse number . Many different systems are used in limnology to number waterbodies such as lakes, rivers and ...
Massah ( Hebrew: מַסָּה) and Meribah ( Hebrew: מְרִיבָה, also spelled " Mirabah ") are place names found in the Hebrew Bible. The Israelites are said to have travelled through Massah and Meribah during the Exodus, although the continuous list of visited stations in Numbers 33 does not mention this. In Exodus 17:7, Meribah is ...
Infographic explaining the hierarchy of the United States hydrologic unit system. Originally a four-tier system divided into regions, sub-regions, accounting units, and cataloging units, each unit was assigned a unique Hydrologic Unit Code (HUC). As first implemented the system had 21 regions, 221 subregions, 378 accounting units, and 2,264 ...
Aurorae on the north pole of Jupiter generate cyclotron masers ( Hubble) An astrophysical maser is a naturally occurring source of stimulated spectral line emission, typically in the microwave portion of the electromagnetic spectrum. This emission may arise in molecular clouds, comets, planetary atmospheres, stellar atmospheres, or various ...
Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.
An oceanographic water mass is an identifiable body of water with a common formation history which has physical properties distinct from surrounding water. Properties include temperature, salinity, chemical - isotopic ratios, and other physical quantities which are conservative flow tracers. Water mass is also identified by its non-conservative ...
Water is also central to acid-base neutrality and enzyme function. An acid, a hydrogen ion (H +, that is, a proton) donor, can be neutralized by a base, a proton acceptor such as a hydroxide ion (OH −) to form water. Water is considered to be neutral, with a pH (the negative log of the hydrogen ion concentration) of 7.
Ships and marine facilities must conform to an international standard for piping systems identification. This is ISO 14726:2008 Ships and marine technology — Identification colours for the content of piping systems. This is a two-colour banded marking system. The main colour shows what the fluid is being used for.