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  2. Beaufort scale - Wikipedia

    en.wikipedia.org/wiki/Beaufort_scale

    4–7 mph 6–11 km/h 1.6–3.3 m/s 1–2 ft 0.3–0.6 m Small wavelets still short but more pronounced; crests have a glassy appearance but do not break Wind felt on face; leaves rustle; wind vane moved by wind 3 Gentle breeze 7–10 knots 8–12 mph 12–19 km/h 3.4–5.4 m/s 2–4 ft 0.6–1.2 m

  3. Assured clear distance ahead - Wikipedia

    en.wikipedia.org/wiki/Assured_Clear_Distance_Ahead

    However, because the difference between wet and dry is half-a-second at 30 MPH and one second at 60 MPH, and because dividing by two is easier than three, we can use a correctable rule of thumb: t ≈ v 20 + 1 (general rule of thumb) {\displaystyle \color {Sepia}{t\approx {\frac {v}{20}}+1\quad {\text{(general rule of thumb)}}}} (instead add 2 ...

  4. Orders of magnitude (speed) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(speed)

    To help compare different orders of magnitude, the following list describes various speed levels between approximately 2.2 × 10 −18 m/s and 3.0 × 10 8 m/s (the speed of light). Values in bold are exact.

  5. Terminal velocity - Wikipedia

    en.wikipedia.org/wiki/Terminal_velocity

    Settling velocity W s of a sand grain (diameter d, density 2650 kg/m 3) in water at 20 °C, computed with the formula of Soulsby (1997). When the buoyancy effects are taken into account, an object falling through a fluid under its own weight can reach a terminal velocity (settling velocity) if the net force acting on the object becomes zero.

  6. Speed of sound - Wikipedia

    en.wikipedia.org/wiki/Speed_of_sound

    T 25 is 298.15 K (= 25 °C = 77 °F), giving a value of 346.1 m/s (= 1 135.6 ft/s = 1246 km/h = 774.3 mph = 672.8 kn). In fact, assuming an ideal gas , the speed of sound c depends on temperature and composition only, not on the pressure or density (since these change in lockstep for a given temperature and cancel out).

  7. How a 24-Year-Old Surfer Rode a Wave the Size of 10-Story ...

    www.aol.com/24-old-surfer-rode-wave-163856876.html

    By Dec. 22, Slebir had returned to California, grabbed a few hours of sleep and was up at 4 o'clock the next morning hoping, at first light, to get out into the mid-50-degree water of the hallowed ...

  8. NYT Connections Sports Edition Today: Hints and Answers for ...

    www.aol.com/nyt-connections-sports-edition-today...

    So, don't scroll any further if you don't want to see the solutions! The answers to today's Connections Sports Edition #145 are coming up next. Related: 15 Fun Games Like Connections to Play Every ...

  9. Underwater speed record - Wikipedia

    en.wikipedia.org/wiki/Underwater_speed_record

    In 1960, HMS Explorer S30 achieved an underwater speed of over 30 knots. [1] In 1965, the experimental USS Albacore reported a speed of 33 knots (61 km/h; 38 mph). [ 2 ] The Soviet November-class submarine was found in 1968 to have a speed of 31 knots (57 km/h; 36 mph). [ 3 ]