Browse Reference Articles
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Transition metal
The term transition metal (sometimes also called a transition element) commonly refers to any element in the d-block of the periodic table, including zinc, cadmium and ... > more -
Carbohydrate
Carbohydrates are chemical compounds that contain oxygen, hydrogen, and carbon atoms. They consist of monosaccharide sugars of varying chain lengths and that have the general chemical formula ... > more -
Newton's cradle
Newton's cradle or Newton's balls, named after Sir Isaac Newton is a device that demonstrates conservation of momentum and energy. It is constructed from a series of pendulums (usually five in ... > more -
Security engineering
Security engineering is the field of engineering dealing with the security and integrity of real-world systems. It is similar to systems engineering in that its motivation is to make a system meet ... > more -
Constructal theory
The constructal theory of global optimization under local constraints explains in a simple manner the shapes that arise in nature. It is the thought that flow architecture comes from a principle of ... > more -
Macromolecule
The literal definition of the term macromolecule implies large molecule. In the context of science and engineering, the term may be applied to conventional polymers and biopolymers (such as DNA) as ... > more -
Natural gas
Natural gas, commonly referred to as gas, is a gaseous fossil fuel consisting primarily of methane. It is found in oil fields and natural gas fields, as well as—in smaller quantities—in ... > more
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