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  2. Beaufort scale - Wikipedia

    en.wikipedia.org/wiki/Beaufort_scale

    Wind speed on the Beaufort scale is based on the empirical relationship: [6] v = 0.836 B 3/2 m/s; v = 1.625 B 3/2 knots (=) where v is the equivalent wind speed at 10 metres above the sea surface and B is Beaufort scale number.

  3. Wind speed - Wikipedia

    en.wikipedia.org/wiki/Wind_speed

    An anemometer is commonly used to measure wind speed. Global distribution of wind speed at 10m above ground averaged over the years 1981–2010 from the CHELSA-BIOCLIM+ data set [1] In meteorology, wind speed, or wind flow speed, is a fundamental atmospheric quantity caused by air moving from high to low pressure, usually due to changes in ...

  4. Wind profile power law - Wikipedia

    en.wikipedia.org/wiki/Wind_profile_power_law

    The power law is often used in wind power assessments [4] [5] where wind speeds at the height of a turbine ( 50 metres) must be estimated from near surface wind observations (~10 metres), or where wind speed data at various heights must be adjusted to a standard height [6] prior to use.

  5. This may just be the best umbrella ever. This ‘reverse umbrella’ doesn’t blow up in the wind, and it keeps your hands and head totally dry: ‘This is the greatest invention’ Skip to main ...

  6. Wind gradient - Wikipedia

    en.wikipedia.org/wiki/Wind_gradient

    In common usage, wind gradient, more specifically wind speed gradient [1] or wind velocity gradient, [2] or alternatively shear wind, [3] is the vertical component of the gradient of the mean horizontal wind speed in the lower atmosphere. [4] It is the rate of increase of wind strength with unit increase in height above ground level.

  7. Enhanced Fujita scale - Wikipedia

    en.wikipedia.org/wiki/Enhanced_Fujita_scale

    The old scale lists an F5 tornado as wind speeds of 261–318 mph (420–512 km/h), while the new scale lists an EF5 as a tornado with winds above 200 mph (322 km/h), found to be sufficient to cause the damage previously ascribed to the F5 range of wind speeds.

  8. This ‘reverse umbrella’ doesn’t blow up in the wind, and it ...

    www.aol.com/lifestyle/reverse-umbrella-doesn-t...

    This may just be the best umbrella ever. For premium support please call: 800-290-4726 more ways to reach us

  9. Anemometer - Wikipedia

    en.wikipedia.org/wiki/Anemometer

    The air flow past the cups in any horizontal direction turned the shaft at a rate roughly proportional to the wind's speed. Therefore, counting the shaft's revolutions over a set time interval produced a value proportional to the average wind speed for a wide range of speeds. This type of instrument is also called a rotational anemometer.

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