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  2. Tide - Wikipedia

    In most locations, the largest constituent is the principal lunar semi-diurnal, also known as the M2 tidal constituent or M 2 tidal constituent.Its period is about 12 hours and 25.2 minutes, exactly half a tidal lunar day, which is the average time separating one lunar zenith from the next, and thus is the time required for the Earth to rotate once relative to the Moon.

  3. Online dating service - Wikipedia

    They found that consistent with prior research, including speed-dating studies, women tended to be pickier than men. In fact, while 29% of white men wanted to date only white women, 64% of white women were willing to date white men only. Of those who stated a racial preference, 97% of white men excluded black women, 48% Latinas, and 53% Asian ...

  4. 2020 stock market crash - Wikipedia

    On 27 February, due to mounting worries about the COVID-19 pandemic, stock markets in Asia-Pacific and Europe saw 3–5% declines, with the NASDAQ-100, the S&P 500, and the Dow Jones Industrial Average posting their sharpest falls since 2008 (and the Dow falling 1,191 points, its largest one-day drop since the financial crisis of 2007–2008).

  5. Microprocessor - Wikipedia

    Another early 8-bit microprocessor was the Signetics 2650, which enjoyed a brief surge of interest due to its innovative and powerful instruction set architecture. A seminal microprocessor in the world of spaceflight was RCA 's RCA 1802 (aka CDP1802, RCA COSMAC) (introduced in 1976), which was used on board the Galileo probe to Jupiter ...

  6. Airboat - Wikipedia

    The first airboats to see any real use date to 1915. The British Army used airboats, which they referred to as Lambert "Hydro-Glisseurs", [c] in the Mesopotamian Campaign of the First World War . These "Hydro-Glisseurs" were small, flat-bottomed hydroplanes with metal-clad wooden hulls propelled by a large aircraft fan that allowed them to ...

  7. 64-bit computing - Wikipedia

    A 1998 to 1999 launch date was targeted. 1995 Sun launches a 64-bit SPARC processor, the UltraSPARC. Fujitsu-owned HAL Computer Systems launches workstations based on a 64-bit CPU, HAL's independently designed first-generation SPARC64. IBM releases the A10 and A30 microprocessors, the first 64-bit PowerPC AS processors.

  8. Executive functions - Wikipedia

    The executive functions are among the last mental functions to reach maturity. This is due to the delayed maturation of the prefrontal cortex, which is not completely myelinated until well into a person's third decade of life. Development of executive functions tends to occur in spurts, when new skills, strategies, and forms of awareness emerge.

  9. Occupational burnout - Wikipedia

    According to the World Health Organization (WHO), occupational burnout is a syndrome resulting from chronic work-related stress, with symptoms characterized by "feelings of energy depletion or exhaustion; increased mental distance from one’s job, or feelings of negativism or cynicism related to one's job; and reduced professional efficacy".