1997
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2 days ago · Read about today's 1-HR PM2.5 and 24-HR Pollutants Standard Index live from NEA.
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2 days ago · In parapsychology, psi is the unknown factor in extrasensory perception and psychokinesis experiences that is not explained by known physical or biological mechanisms. The term is derived from ψ psi, the 23rd letter of the Greek alphabet and the initial letter of the Greek: ψυχή psyche, "mind, soul".
2 days ago · A pressure vessel is a container designed to hold gases or liquids at a pressure substantially different from the ambient pressure . Construction methods and materials may be chosen to suit the pressure application, and will depend on the size of the vessel, the contents, working pressure, mass constraints, and the number of items required.
Jul 3, 2024 · Tensile strength, maximum load that a material can support without fracture when being stretched, divided by the original cross-sectional are of the material. Tensile strengths have dimensions of force per unit area, which are commonly expressed in units of pounds per square inch.
- The Editors of Encyclopaedia Britannica
4 days ago · Psychology or psychologist, denoted Ψ, used in the logo of various psychological associations. Psi Chi, the National Honor Society in psychology. Psi-theory, theory about the human mind, a cognitive architecture. Psychiatric Solutions, Inc., corporation that owns psychiatric hospitals.
Jul 13, 2024 · Digamma Function, Lerch Transcendent, Polygamma Function, Trigamma Function, Ramanujan Psi Sum.
Jul 3, 2024 · Pressure is a crucial physical quantity that describes the force exerted over a unit area. It plays a significant role in various fields such as meteorology, engineering, and medicine. To quantify pressure accurately, different units are employed based on the context and the precision required.
