Search results
Results from the WOW.Com Content Network
Part of America's past and current preeminence in applied science has been due to its vast research and development budget, which at $401.6bn in 2009 was more than double that of China's $154.1bn and over 25% greater than the European Union's $297.9bn.
The nanowire battery was co-invented in 2007 by Chinese-American Dr. Yi Cui, an assistant professor of materials science and engineering along with his colleagues at Stanford University. [30] [31] 2007 iPhone. The iPhone is a line of smartphones designed and marketed by Apple Inc.
In civil engineering the smaller types are used for road and port construction. The larger types are used in strip-mining operations to move overburden above coal, and for tar-sand mining. A drag line bucket system consists of a large bucket which is suspended from a boom, a large truss-like structure, with wire ropes.
The US public vastly overestimates the amount spent on foreign aid. [213] In the US, an increase in gross income will never reduce a taxpayer's post-tax earnings by putting them in a higher tax bracket. Tax brackets specify marginal tax rates: only income earned in the higher tax bracket is taxed at the higher rate. [214]
Servos, John W., Physical chemistry from Ostwald to Pauling : the making of a science in America, Princeton, N.J. : Princeton University Press, 1990. ISBN 0-691-08566-8; Smith, Merrit Roe; Clancey, Gregory (1996), Major Problems in the History of American Technology, Boston: Houghton Mifflin, ISBN 0-669-35472-4
1886: Heinrich Hertz succeeds in proving the existence of electromagnetic waves for the first time – now the groundwork for wireless telegraphy and radio broadcasting in physical science is laid. 1887: Unaware of Charles Sumner Tainter 's experiments, German-American Emil Berliner has his phonograph patented.
The timeline begins at the Bronze Age, as it is difficult to give even estimates for the timing of events prior to this, such as of the discovery of counting, natural numbers and arithmetic. To avoid overlap with timeline of historic inventions , the timeline does not list examples of documentation for manufactured substances and devices unless ...
A multiple-effect evaporator, as defined in chemical engineering, is an apparatus for efficiently using the heat from steam to evaporate water. In 1843, Norbert Rillieux invented and patented the multiple-effect evaporator where its first installation and use was in a Louisiana sugar factory. [89] 1843 Rotary printing press