Geek研究: 輪船航行后的物理現(xiàn)象
來源:滬江聽寫酷
2011-08-01 12:51
存在于輪船行駛過后的物理與科學(xué)現(xiàn)象。
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選材/校對/翻譯:hqj5715
Hints:
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選材/校對/翻譯:hqj5715
The wake starts out smooth because the passage of the ship destroys whatever wave patterns were there before the ship came through.
The reason it stays smooth has to do with tiny organic molecules,such as decomposed plankton,on the surface of the water.
There are always some organic molecules on the ocean's surface, but as the ship pushes along, it plows these molecules to the sides. This leaves the wake something like a winter road that has just been snow-plowed, with piles of snow on both sides of the road.
The center of the wake is relatively free of organic molecules, but the two sides each have an accumulated pile-up. These stretch behind the ship on either side of the wake like ribbons.
Well that's interesting, but how does this keep the wake smooth?
It turns out that a thin ribbon of organic molecules on the surface of water is really good at suppressing small waves. These two ribbons, on either side of the wake, act like guardrails, preventing small waves from entering and crossing the wake.
So that's why the wake stays so smooth and gloss--microscopic ribbons of decomposed plankton!
航跡的平穩(wěn)是因?yàn)檩喆耐ㄟ^摧毀了在輪船通過之前所存在的任何形式的波浪。
航跡保持穩(wěn)定原因也與細(xì)小的有機(jī)細(xì)胞有關(guān)--比如存在于水表面的分解浮游生物。
海水表面也經(jīng)常會(huì)有一些有機(jī)生物,但是當(dāng)輪船經(jīng)過的時(shí)候,會(huì)將這些微生物推到兩邊。這使得航跡像是剛被鏟過雪的冬天的路面一樣,路的兩邊堆滿積雪。
航跡的中心相對的無有機(jī)生物,但是波浪的兩邊卻堆滿了微生物。輪船行駛之后航跡兩邊的結(jié)構(gòu)就像色帶一樣。
這非常有趣,但是這些色帶是怎樣保持航跡穩(wěn)定的呢?
答案是,水表面薄薄的有機(jī)生物色帶非常有利于抑制小的波浪。存在于波浪兩邊的色帶,就像護(hù)欄一樣,可以阻止細(xì)小的波浪進(jìn)入、穿過航跡。
這就是航跡保持穩(wěn)定和具有光澤的原因--由分解的浮游生物形成的微小色帶。
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