CHEMICALS / ELEMENTS |
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A chemical element, often called simply element, is a chemical substance that cannot be divided or changed into other chemical substances by any ordinary chemical technique. The smallest unit of this kind of chemical substances is an atom, and the term "atom" is typically used to refer to atoms of particular elements. An element is a class of substances that contain the same number of protons in all its atoms. Chemicals are made from Chemical Elements.
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DEMOLITION |
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Demolition is the opposite of construction: the tearing-down of buildings and other structures. It is contrasted with deconstruction, which is the taking down of buildings while carefully preserving valuable elements for re-use.
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DROWNING |
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Drowning is death caused by the filling of the lungs by a liquid, usually water, rendering breathing ineffective and leading to death due to asphyxia. Near drowning is initial survival of a drowning event, and can lead to serious secondary complications including death later on; cases of near drowning therefore also require attention by medical professionals. Secondary drowning is death due to chemical and biological changes in the lungs after a near drowning incident or exposure to chemicals. In many countries, drowning is one of the leading causes of death for children under 14 years old.
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ENGINEERING - GENERAL |
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Engineering is the application of scientific and technical knowledge to solve human problems. Engineers use imagination, judgement and reasoning to apply science, technology, mathematics, and practical experience. The result is the design, production, and operation of useful objects or processes.
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