U型管测蒸馏水表面张力系数

传统的毛细管法测定蒸馏水表面张力,管外无限大液面是一种近似;位置也不易标定,高度尺测量毛细管内液柱高精度也低;需液量也大。用U型管测量,管外液面以有限代替无限,用读数显微镜代替高度尺,提高了测量精度,同时也标定了管外液面。仅有少量液体可测张力,有可能推广到不易得液体如血倒表面张力的测定。

We use traditional capillary method to measure distilled water surface tension. The infinite liquid surface outside capillary is not correct. This position is not easy to orientate. Using U type tube we measure liquid surface height outside tube It may use finite quantity instead of infinite one, use reading microscope instead of height ruler so that we may promote exact degree and may orientate liquid surface height outside tude. Thus we may measure tension only using a little liquid. This measure method may popularize in this condition liquid is not easy to acquire.