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  2. Fujita scale - Wikipedia

    en.wikipedia.org/wiki/Fujita_scale

    The 1977 Birmingham–Smithfield F5 tornado's damage was surveyed by Ted Fujita and he "toyed with the idea of rating the Smithfield tornado an F6". [13] In 2001, tornado expert Thomas P. Grazulis stated in his book F5F6 Tornadoes; "In my opinion, if there ever was an F6 tornado caught on video, it was the Pampa, Texas tornado of 1995". [14]

  3. Function key - Wikipedia

    en.wikipedia.org/wiki/Function_key

    For example, F3 copied words from the previous command to the current command prompt. Following the IBM Common User Access guidelines, the F1 key gradually became universally associated with Help in most early Windows programs. To this day, Microsoft Office programs running in Windows list F1 as the key for Help in the Help menu. Internet ...

  4. Tornado intensity - Wikipedia

    en.wikipedia.org/wiki/Tornado_intensity

    The F in F1, F2, etc. stands for Fujita. The scale was based on a relationship between the Beaufort scale and the Mach number scale; the low end of F1 on his scale corresponds to the low end of B12 on the Beaufort scale, and the low end of F12 corresponds to the speed of sound at sea level, or Mach 1. In practice, tornadoes are only assigned ...

  5. Formula racing - Wikipedia

    en.wikipedia.org/wiki/Formula_racing

    Formula Regional is the last category that takes place outside the F1 events format. It was created to take over from the various F3 championships around the world after the FIA deemed that the title "Formula 3" would be exclusively used by the series that runs on F1 weekends known previously as GP3.

  6. FIA Global Pathway from Karting to Formula One - Wikipedia

    en.wikipedia.org/wiki/FIA_Global_Pathway_from...

    Formula 4 is the first stage of the Global Pathway, for drivers fifteen years of age and older. [1] ... F1 FIA F2 FIA F3 FR F4 OK (karting) Chassis: Various: Dallara ...

  7. Apple keyboards - Wikipedia

    en.wikipedia.org/wiki/Apple_keyboards

    F1 F2 F3 F4 F5 F6 F7 F8 F9 F10 F11 F12 (2003–2007) 🔅 Brightness down: 🔆 Brightness up: 🔇 Mute 🔉 Volume down: 🔊 Volume up: Num Lock: Display switch: All windows : Application windows (Exposé) Show desktop (Exposé) Dashboard (2007–2011) Exposé: Dashboard: âĒī¸ Rewind ⏯ī¸ Play/ pause: ⏊ī¸ Fast forward: 🔇 Mute 🔉 ...

  8. Tornado outbreak of April 1977 - Wikipedia

    en.wikipedia.org/wiki/Tornado_outbreak_of_April_1977

    F1 F2 F3 F4 F5 April 4 19 1 1 5 9 2 0 1 24 157 $29,948,500: April 5 3 0 0 2 1 0 0 0 0 1 $2,775,000: ... F5-F6 Tornadoes. St. Johnsbury, Vermont: The Tornado Project ...

  9. List of Formula One driver numbers - Wikipedia

    en.wikipedia.org/wiki/List_of_Formula_One_driver...

    In Formula One, each car is numbered. Since the inaugural Formula One World Championship in 1950, several numbering systems have been used. This list covers the numbers used by drivers since the start of the 2014 Formula One season, when drivers have been allowed to choose a number that they would carry throughout their career. [1]