[轉]解開浮沙之謎
<P><SPAN class=inline-search-anchor id=site_index_aid_2 onmouseover='this.className="inline-search-anchor-hover"' onclick='showinlinesearchbox("2","電影")' onmouseout='this.className="inline-search-anchor"' alt="More on [電影]"><SPAN id=siteindexid_1>電影</SPAN></SPAN><SPAN id=siteindexid_2>中受害者被浮沙吞噬至沒頂的場面,在現實原來不會出現。科學家最近解開浮沙之謎,指受害者一旦在浮沙中沉至腰間,就會被浮沙的浮力承托,不會再往下沉,反而如何脫險更講技巧,因為要是硬將受困者強拉上來,浮沙的拉力可能將受困者撕成兩半,</SPAN><SPAN id=siteindexid_3>硬拉上來會撕成兩截。</SPAN><BR><BR><SPAN id=siteindexid_4>浮沙是沙、黏土和鹽水的混合物,浮沙粒子處於不穩定狀態,一旦浮沙表面受干擾,它就會液化,分為多水層和多沙層兩部份,受困者愈是掙扎,浮沙就會愈液化,結果受困者愈往下沉。</SPAN><BR><SPAN id=siteindexid_5></SPAN></P><P><SPAN>浮沙密度是一般人體密度的兩倍,因此浮沙不會將受困者吞噬至沒頂,但浮沙拉力強大,單是救出一隻腳掉進浮沙的受困者,就要付出拉出一部小型</SPAN><SPAN class=inline-search-anchor id=site_index_aid_1 onmouseover='this.className="inline-search-anchor-hover"' onclick='showinlinesearchbox("1","汽車")' onmouseout='this.className="inline-search-anchor"' alt="More on [汽車]"><SPAN id=siteindexid_6>汽車</SPAN></SPAN><SPAN id=siteindexid_7>的力量。不過,受困者毋須驚慌,只要每次以一吋幅度輕輕移動雙腳,讓水進入雙腳四周範圍,就可慢慢脫險.</SPAN><BR><SPAN id=siteindexid_8>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~</SPAN><BR><BR><SPAN id=siteindexid_9>大部份的人遇到應該還是會手忙腳亂的亂抓一通吧~~~!</SPAN><BR><BR><SPAN id=siteindexid_10>所以...去沙漠還是帶著游泳圈比較安全....冏rz</SPAN><BR></P> 哦!!!
頁:
[1]