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This is done in "3+1" formulations, where spacetime is split into three space dimensions and one time dimension. The best-known example is the ADM formalism . [ 174 ] These decompositions show that the spacetime evolution equations of general relativity are well-behaved: solutions always exist , and are uniquely defined, once suitable initial ...
Questions are asked in the categories of Biology, Chemistry, Earth and Space Science, Energy (dealing with DOE research), Mathematics, and Physics. [1] Several categories have been added, dropped, or merged throughout the years. Computer Science was dropped from the list in late 2002. Current Events was in the 2005 competition, but did not make ...
There is some disagreement as to whether biological nomenclature is considered a part of taxonomy (definitions 1 and 2), or a part of systematics outside taxonomy. [8] [9] For example, definition 6 is paired with the following definition of systematics that places nomenclature outside taxonomy: [6]
Science is a systematic discipline that builds and organises knowledge in the form of testable hypotheses and predictions about the universe. [1] [2] Modern science is typically divided into two or three major branches: [3] the natural sciences (e.g., physics, chemistry, and biology), which study the physical world; and the social sciences (e.g., economics, psychology, and sociology), which ...
This glossary of biology terms is a list of definitions of fundamental terms and concepts used in biology, the study of life and of living organisms.It is intended as introductory material for novices; for more specific and technical definitions from sub-disciplines and related fields, see Glossary of cell biology, Glossary of genetics, Glossary of evolutionary biology, Glossary of ecology ...
In one section, he appears to defend a type of plural voting where more competent citizens are given extra votes (a view he later repudiated). However, in another chapter he argues cogently for the value of participation by all citizens.
The density of matter in the interstellar medium can vary considerably: the average is around 10 6 particles per m 3, [136] but cold molecular clouds can hold 10 8 –10 12 per m 3. [39] [134] A number of molecules exist in interstellar space, which can form dust particles as tiny as 0.1 μm. [137]
Some omega−9 fatty acids are common components of animal fat and vegetable oil. Two omega−9 fatty acids important in industry are: Oleic acid (18:1, n−9), which is a main component of olive oil, macadamia oil and other monounsaturated fats; Erucic acid (22:1, n−9), which is found in rapeseed, wallflower seed, and mustard seed.