神奇的管子（图）
<br /="/"/><p align="center">神奇的管子</p><p align="left">小泽前往W国。W国的小叶展示一直径5厘米的金属制管说道:"我们国内的水管皆以此物体制成"，小泽不解遒:"它管径如此细小，何能翰送水?""它1分钟可输送10吨以上的水呢!"小叶答说。 "是否将其绑成一束来使用呢?"不! 仅使用一根。"究竟是何道理呢? <br /="/"/><input /="/" height="130" src="http://www.nx.cninfo.net/xzycs/njzzw/qustion/images/161.jpg" style="CURSOR: default" title=" 顶顶华闻http://www.topChineseNews.com " type="image" width="200"/><div></div><span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></p>answer
<table cellpadding="8" height="100%" width="100%"><tr><td valign="top"><br /="/"/><div>1 / (pi * 0.025^2 * 60) = 8.48 (m / s)</div><div>Sending water at this speed is not unreasonable.</div><span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></td></tr></table>Is 10 metric ton = 10,000Kg?
<table cellpadding="8" height="100%" width="100%"><tr><td valign="top"><br /="/"/>if it is, then would need 10 times of 8.48m/s, which is 84.8m/s. That's quite a powerful water jet.<span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/>I guess one way to do this is to bend the tube into a tight spiral, ie it becomes the wall of a larger tube. I don't know if there is an easy way to make it waterproof.<span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></td></tr></table>you got it!（图）
<table cellpadding="8" height="100%" width="100%"><tr><td valign="top"><br /="/"/><input /="/" height="131" src="http://www.nx.cninfo.net/xzycs/njzzw/qustion/images/161da.jpg" style="CURSOR: default" title=" 顶顶华闻http://www.topChineseNews.com " type="image" width="130"/><div></div><span style="display:none;">www.ddhw.com</span><br /="/"/><br /="/"/> <div style="MARGIN-TOP:20px;MARGIN-LEFT:0;MARGIN-BOTTOM:0;float:left"></div></td></tr></table>
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