物理英文翻译Since the surface of a liquid acts like an elastic ski

物理英文翻译
Since the surface of a liquid acts like an elastic skin, the surface is in a state of tension. A blown-up football bladder has a surface in a state of tension. This is a very rough analogy because the surface tension of a bladder increases as the surface area increases, whereas the surface tension of a liquid is independent of surface area. Any line in the bladder surface is then acted on by two equal and opposite forces, and if the bladder is cut with a knife the rubber is drawn away from the incision by the two forces present.
R.C.Brown and others have pointed out that molecules in the surface of a liquid have probably a less dense packing than those in the bulk of the liquid, as there are fewer molecules in the surface when its area is a minimum. The average separation between molecules in the surface are then slightly greater than those inside. On average, then, the force between neighboring molecules in the surface are attractive. This would explain the existence of surface tension.
The surface tension, R , of a liquid, sometimes called the coefficient of surface tension, is defined as the force per unit length acting in the surface at right angles to one side of a line drawn in the surface. In Fig.7.4 AB represents a line 1 m long. The unit of R is Newton

因为液体的表面行动象有弹性皮肤,表面在紧张状态. 炸毁的橄榄球膀胱有表面在紧张状态. 这是非常概略的比喻,因为膀胱的表面张力增加,当表面增加,而液体的表面张力是表面的独立. 在膀胱表面的所有线由二相等和相反力量然后行动,并且,如果膀胱用刀子切开橡胶被画远离切开被当前二力量.
R.C.Brown和其他指出在液体的表面的分子比那些大概有一种较不密集的包装在液体的大多数,尽管有在表面的少量分子,当它的区域是极小值时. 在分子之间的平均分离在表面比那些然后有一点伟大里面. 平均起来,然后,在邻居分子之间的力量在表面是有吸引力的. 这将解释表面张力的存在.
The表面张力, R,液体,有时叫系数表面张力,被定义作为力量每个直角行动在表面的单位长度对在表面画的线的一边. 在Fig.7.4 AB代表长的线1 m. R单位是牛顿

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