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Although a common classroom experiment is often explained this way, [442] Bernoulli's principle only applies within a flow field, and the air above and below the paper is in different flow fields. [443] The paper rises because the air follows the curve of the paper and a curved streamline will develop pressure differences perpendicular to the ...
The journals are grouped into four main sections: Physical Sciences and Engineering; Life Sciences; Health Sciences; Social Sciences and Humanities.; Article abstracts are freely available, and access to their full texts (in PDF and, for newer publications, also HTML) generally requires a subscription or pay-per-view purchase unless the content is freely available in open access.
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 ...
For example, in an 1804 advertisement to recover a runaway slave, he offered "ten dollars extra, for every hundred lashes any person will give him" up to three hundred lashes—a number that would likely have been deadly. [61] [62] Over time, his accumulation of wealth in both slaves and land placed him among the elite families of Tennessee. [63]
Interior of Scientific American ' s office at 361 Broadway in New York City Scientific American 's early office at 361 Broadway in Manhattan A 2011 photo of Scientific American 's office at the Woolworth Building in New York City, built in 1913 by Frank Winfield Woolworth [3] The Scientific American building at 24-26 West 40th Street, commissioned by Munn and Co. in 1924 [3]
Natural science or empirical science is one of the branches of science concerned with the description, understanding and prediction of natural phenomena, based on empirical evidence from observation and experimentation. [1] Mechanisms such as peer review and reproducibility of findings are used to try to ensure the validity of scientific advances.
Alexandra Elbakyan at a conference at Harvard (2010). Sci-Hub was created by Alexandra Elbakyan, who was born in Kazakhstan in 1988. [22] Elbakyan earned her undergraduate degree at Kazakh National Technical University [23] studying information technology, then worked for a year for a computer security firm in Moscow, then joined a research team at the University of Freiburg in Germany in 2010 ...
G-banding patterns of human chromosome 12 in three different resolutions (400, [12] 550 [13] and 850 [3]). Band length in this diagram is based on the ideograms from ISCN (2013). [ 14 ] This type of ideogram represents actual relative band length observed under a microscope at the different moments during the mitotic process .