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Such use was so common that the word "plumbing" derives from plumbum, the Latin word for lead. This was a source of lead-related health problems in the years before the health hazards of ingesting lead were fully understood; among these were stillbirths and high rates of infant mortality .
A material is a substance or mixture of substances that constitutes an object.Materials can be pure or impure, living or non-living matter. Materials can be classified on the basis of their physical and chemical properties, or on their geological origin or biological function.
A video shedding light on the unsafe and undignified working conditions of many sanitation workers in India Main article: WASH § Health aspects This section is an excerpt from WASH § WASH-attributable burden of diseases and injuries .
The range of signal frequencies that a piece of audio or video equipment can encode or decode; the difference between the limiting frequencies of a continuous frequency band. Video uses higher frequency than audio, thus requires a wider bandwidth. [2] Bar Test Pattern Special test pattern for adjusting color TV receivers or color encoders.
Elementary, a widget set based on the Enlightenment Foundation Libraries; Elementary abelian group, an abelian group in which every nontrivial element is of prime order; Elementary algebra; Elementary arithmetic; Elementary charge, e, of a single electron; Elementary definition, in mathematical logic; elementary OS, a Linux distribution
These include Starfall, ABC mouse, [172] PBS Kids Video, Teach me, and Montessori crosswords. [173] Educational technology in the form of electronic books [109] offer preschool children the option to store and retrieve several books on one device, thus bringing together the traditional action of reading along with the use of educational technology.
A building or edifice is an enclosed structure with a roof and walls, usually standing permanently in one place, [1] such as a house or factory. [1] Buildings come in a variety of sizes, shapes, and functions, and have been adapted throughout history for numerous factors, from building materials available, to weather conditions, land prices, ground conditions, specific uses, prestige, and ...
Elementary mathematics, also known as primary or secondary school mathematics, is the study of mathematics topics that are commonly taught at the primary or secondary school levels around the world. It includes a wide range of mathematical concepts and skills, including number sense , algebra , geometry , measurement , and data analysis .