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4 days ago · e. Quantum dots ( QDs) or semiconductor nanocrystals are semiconductor particles a few nanometres in size with optical and electronic properties that differ from those of larger particles via quantum mechanical effects. They are a central topic in nanotechnology and materials science. When a quantum dot is illuminated by UV light, an electron ...
1 day ago · Cnidaria. Cnidaria ( / nɪˈdɛəriə, naɪ -/ nih-DAIR-ee-ə, NY-) [4] is a phylum under kingdom Animalia containing over 11,000 species [5] of aquatic animals found both in fresh water and marine environments (predominantly the latter), including jellyfish, hydroids, sea anemones, corals and some of the smallest marine parasites.
Jun 21, 2024 · The most common DC plan in the United States is the 401 (k) plan. Total assets of retirement defined contribution plans reached an estimated value of around 9.25 trillion U.S. dollars in the ...
5 days ago · Museum - Art, Collections, Exhibits: The art museum (called art gallery in some places) is concerned primarily with the object as a means of unaided communication with its visitors. Aesthetic value is therefore a major consideration in accepting items for the collection. Traditionally, these collections have comprised paintings, sculpture, and the decorative arts. A number of art museums have ...
Jul 2, 2024 · virtual reality (VR), the use of computer modeling and simulation that enables a person to interact with an artificial three-dimensional (3-D) visual or other sensory environment. VR applications immerse the user in a computer-generated environment that simulates reality through the use of interactive devices, which send and receive information ...
Jun 14, 2024 · laminar flow, type of fluid ( gas or liquid) flow in which the fluid travels smoothly or in regular paths, in contrast to turbulent flow, in which the fluid undergoes irregular fluctuations and mixing. In laminar flow, the velocity, pressure, and other flow properties at each point in the fluid remain constant.
Jun 26, 2024 · Giffen Good: A Giffen good is a good for which demand increases as the price increases, and falls when the price decreases. A Giffen good has an upward-sloping demand curve, which is contrary to ...
