vanessayeh

這個....我不知道我能看得懂多少....

應該看不到兩頁 就會進入夢鄉裡吧

好奇  可以殺死好多隻貓  

奇怪  為什麼會有這種要殺貓的說法 

剛剛看空中浩劫-哥倫比亞052班機  提到"風剪"  光是看中文就讓我很好奇了  我卻聽成...wind share?! 真的是耳朵有問題

於是

http://www.answers.com/topic/wind-stress?cat=technology

Wind stress

The drag or tangential force per unit area exerted on the surface of the Earth by the adjacent layer of moving air. Erosion of ground surfaces and the production of waves on water surfaces are manifestations of wind stress. Surface wind stress determines the exchange of momentum between the Earth and the atmosphere and exerts a strong influence on the typical variation of wind through the lowest kilometer of the atmosphere. Estimated values of the surface wind stress range up to several dynes per square centimeter (0.1 pascal), depending on the nature of the surface and the character of the adjacent airflow. See also Meteorology.

Significant stresses arise within the lower atmosphere because of the strong shear of the wind between the slowly moving air near the ground and the more rapidly moving air a kilometer above and because of the turbulent nature of the airflow in this region. The turbulent eddies referred to here have characteristic dimensions ranging up to a few hundreds of meters.

Wind pressure is the force exerted by the wind per unit area of solid surface exposed normal to the wind direction and is also known as dynamic pressure. In contrast to shearing stresses, the wind pressure arises from the difference in pressure between the windward and lee sides of the exposed surface. Wind pressure thus represents a substantial force when the wind speed is high. See also Wind.

The drag or tangential force of the wind on the sea is expressed in units of dynes per square centimeter or micronewtons per square meter but is normally taken to represent the mean drag over an undefined area, perhaps several kilometers square, containing many waves. It is usually related to an appropriate time and space average of the wind near the sea surface (at 10 m above the mean level, for example).

The drag coefficient over the sea is an important quantity in both meteorology and oceanography since it relates the wind speed to the drag, which generates ocean waves, drives the ocean currents, and sets the scale of the atmospheric turbulence that transfers water vapor and heat from the ocean to the atmosphere to provide the energy for clouds and weather systems. The drag coefficient of the sea surface depends on the wave field and on the turbulent structure of the flow in the air and the water. Present knowledge of the complicated fluid mechanics involved is not sufficient to allow theoretical calculation of it. See also Atmospheric general circulation; Maritime meteorology; Ocean circulation; Ocean waves.

There is substantial agreement that the drag of the wind on the sea is small relative to that of a fixed soil surface with the same geometry. It is largely independent of the fetch and so seems to depends less on the larger waves than on the short waves and ripples. Surface-active agents, which affect the shortest waves, may therefore be important.

另一個

http://oceanworld.tamu.edu/resources/ocng_textbook/chapter04/chapter04_05.htm

The wind, by itself, is usually not very interesting. Often we are much more interested in the force of the wind, or the work done by the wind. The horizontal force of the wind on the sea surface is called the wind stress. Put another way, it is the vertical transfer of horizontal momentum. Thus momentum is transferred from the atmosphere to the ocean by wind stress. Wind stress T is calculated from:

T = ñ C_D U²₁₀

壓力還可以算出來耶…傑克這是太神奇的有趣呀!!!

呵....這個主人很變態  根本就是在整他....  雖然我也會這麼做

 呵....這個也是.....舌頭到處舔...就是想吃

看到畫面  也回想起皮

不說了

又是個傷心往事