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Canonical commutation rule for position q and momentum p variables of a particle, 1927. pq − qp = h / (2 πi ). Uncertainty principle of Heisenberg, 1927. The uncertainty principle, also known as Heisenberg's indeterminacy principle, is a fundamental concept in quantum mechanics. It states that there is a limit to the precision with which ...
The Science, Technology, Engineering, and Mathematics (STEM) Education Coalition [91] works to support STEM programs for teachers and students at the U.S. Department of Education, the National Science Foundation, and other agencies that offer STEM-related programs. Activity of the STEM Coalition seems to have slowed since September 2008.
Grade (climbing) Action Directe was a major milestone in free climbing grades when Wolfgang Güllich freed it in 1991 at 9a (French), 5.14d (American YDS), XI (UIAA). Many climbing routes have a grade that reflects the technical difficulty—and in some cases the risks and commitment level—of the route.
A Doctor of Philosophy ( PhD, Ph.D., or DPhil; Latin: philosophiae doctor or doctor philosophiae) is the most common degree at the highest academic level, awarded following a course of study and research. The degree is abbreviated PhD and sometimes, especially in the U.S., as Ph.D. It is derived from from the Latin Philosophiae Doctor ...
William Shakespeare (bapt.Tooltip baptised 26[a] April 1564 – 23 April 1616)[b] was an English playwright, poet and actor. He is widely regarded as the greatest writer in the English language and the world's pre-eminent dramatist.[3][4][5] He is often called England's national poet and the "Bard of Avon" (or simply "the Bard"). His extant ...
The University of Oxford is a collegiate research university in Oxford, England. There is evidence of teaching as early as 1096,[2] making it the oldest university in the English-speaking world and the world's second-oldest university in continuous operation.[2][11][12] It grew rapidly from 1167, when Henry II banned English students from ...
program. A "Hello, World!" program is generally a simple computer program which outputs (or displays) to the screen (often the console) a message similar to "Hello, World!" while ignoring any user input. A small piece of code in most general-purpose programming languages, this program is used to illustrate a language's basic syntax.