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第二十三章 阿基米德螺线和螺旋汞(1 / 1)

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有一天阿基米德开始想要研究螺线了,毕竟螺线在很多地方挺常见的,贝壳、海螺、植物树叶的排布甚至水的旋涡等等。

圆可以由一个固定的半径绕一个点画出,而这个半径匀速边长的话,就会画出一个螺线。

阿基米德在其着作《螺旋线》中对此作了描述。

而作为实用性的,莫过于阿基米德螺旋汞了。

忽然,他看到一群人在用木桶拎水,便问道:“他们干嘛要拎水?”

“河床地势低,农田地势高,农民只好拎水浇地了。”一位当地的同学告诉他.

“这样拎水的效率太低了,浇一丘田不知要拎多少桶。”阿基米德心中产生了对农民的同情心。

那位同学不以为然地说:“祖祖辈辈,人们都是这样做的。你有什么好办法?”

回去后,阿基米德的眼前总是闪现出农民拎水时吃力的样子。“可不可以让水往高处流呢?”阿基米德开始思考这一问题。

渐渐地,在阿基米德的脑海中产生了一个设想:“做一个大螺旋,把它放在一个圆筒里.这样,螺旋转起来后,水不就可以沿着螺旋沟带到高处去了吗?”

阿基米德立即根据这一设想,画出了一张草图。形状是一个管子绕着一个棍子从一头到达另一头。

然后把这个螺旋汞的一头放在水里,人工或喝水冲刷让这个螺旋汞绕棍子转动,进入水里的一头的水就会因为螺旋形状的带动,将水带上来,以达到让水由低水位到达高水位的目的。

他拿着这张草图去找木匠,请求师傅帮他做一个用于泵水的工具。

经阿基米德的指点,木匠制出了一个怪玩意儿。阿基米德将这个东西搬到河边,并把它的一头放进河水里,然后轻轻地摇动手柄。“咕噜噜”,只见河水在摇动手柄的同时,从怪东西的顶端不断地涌出来。水,果然往高处流了。

前来围观的农民,被这神奇的东西迷住了。他们纷纷赞扬阿基米德为农民做了一件大好事。不久,这种螺旋水泵在尼罗河流域,乃至更广大的范围流传开了。人们把这种水泵称为阿基米德螺旋泵。一些现代工厂仍然使用这种阿基米德螺旋泵来移动流质和粉物。

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