The 0.00256 is a dimensionless coefficient from simplifying terms in the English system of units. A 20 MPH wind hitting a flat surface will exert 1.02 PSF pressure or a little over 32 pounds of force against the sheet of plywood.
If you weighed 100 pounds, it would take a wind speed of about 45 mph to move you, but not knock you down, unless you lose your balance. Knocking you down would take a wind of at least 70 mph.
Thunderstorm winds of 60-75 mph can overturn unanchored mobile homes (many are unanchored), blow over moving tractor trailers, destroy the average sized shed, and rip some house roofs off. Even worse, these winds are capable of downing trees large enough to easily kill a person.
According to the engineers that helped devise the Enhanced Fujita Scale, winds of between 111 - 135 m.p.h. are enough to lift and move average sized cars.
Refrain from any unnecessary driving during this time since these winds will make driving very difficult, especially for high profile vehicles. Winds this strong may damage trees, power lines and small structures.
Walking will be arduous. You will need to brace/lean into wind, and energy output will be significantly increased. Risk of being blown off balance/sideways. Attempting to walk in 60-70mph winds is dangerous, and there is a high risk of being blown over and suffering injury.
A wind which is moving 1,000 mph relative to the Earth's surface would be catastrophic.
Building a Wood- or Steel-Frame Home to Resist 100 mph Winds According to a report by FEMA, new wood-frame houses constructed according to building codes perform well structurally, in winds up to 150 mph, while a steel homes can withstand winds up to 170 mph.
Winds that are 90+ MPH are significant severe winds. Trees may be flattened. Moderate damage to strong roofs and weak roofs are severely damaged.
As far as wind speed, any wind over 50 miles an hour will make it difficult to drive a car. The direction of the wind and the position of the car in relationship to this wind can be a force for or against the car. Anything over 50 miles an hour can be dangerous. Light weight vans will be the first to flip over.
19-24 Mph 29-38 kph 17-21 knots Fresh Breeze Small trees sway. White crested wavelets (whitecaps) form, some spray. 25-31 Mph 39-49 kph 22-27 knots Strong Breeze Large tree branches move, telephone wires begin to "whistle", umbrellas are difficult to keep under control. Larger waves form, whitecaps prevalent, spray.
Potential Impacts: A critical threat to life and property from strong hurricane force winds. Hurricane Winds 90 to 110 mph gusts 115 to 135 mph: Extremely dangerous winds will cause extensive damage and all mobile homes will be destroyed. Houses of poor to average construction will be severely damaged or destroyed.
The good news is that 500 mph winds are rare. Tornadoes can reach 300 mph.  300 is a far cry from 500, the force from a 500 mph wind is several times stronger than the force from a 300 mph wind.
100+ mph – When wind speeds get up to 100+ MPH you start to see major issues even in sturdy, well-built homes. You can expect to see extensive damage. Downed trees everywhere. Major damage will occur to your roof and your siding.
231 miles per hourFor nearly sixty-two years, Mount Washington, New Hampshire held the world record for the fastest wind gust ever recorded on the surface of the Earth: 231 miles per hour, recorded April 12, 1934 by Mount Washington Observatory staff.
According to the National Weather Service, driving conditions can become difficult for high-profile vehicles when wind reaches 30-45 mph. When wind speeds hit 40-58 mph driving becomes more difficult for smaller profile vehicles and even more dangerous for larger vehicles.
Indeed, he has published in the past that a theoretical “hypercane” with winds approaching 500 miles per hour is possible in scenarios where an asteroid hits the Earth and radically heats up ocean waters, far beyond their normal temperature.
261-318 mphThe Fujita ScaleThe Fujita Scale of Tornado IntensityF-Scale NumberIntensity PhraseWind SpeedF3Severe tornado158-206 mphF4Devastating tornado207-260 mphF5Incredible tornado261-318 mph
AntarcticaPart of the Antarctica: The Farthest Place Close to Home Curriculum Collection. It's not just Antarctica's temperatures that are so extreme. Winds speeds on the continent often exceed 100 mph each winter.
Washington is the highest point in a region known for its weather extremes. New England's geography helps create huge temperature variations because arctic air in the cool season can come in contact with air warmed by the Atlantic Ocean.
The definition of cox, short for coxswain, means the person in charge of a boat or its crew. An example of a cox is the person directing rowers in a racing boat. noun.
The CPU is often referred to as the brain of the computer. However, it is more appropriate to refer to software as the brain and the CPU as a very efficient calculator. When referring to your computer or monitor, it's proper to refer to them as either the "computer" or "monitor" and not a CPU.
Seafood such as shrimps that do not have fins and scales so they are not Halal. The Sunni Hanafi school considers the Shrimps, Prawns, Octopus, Lobsters, Calamari, Shellfish, Crustaceans, Clams, Crabs, Scallops, Snakes, Frogs, Crocodiles, etc. not to be Halal thus they are Haram and prohibited for Muslims.