Surface tension in the water can sling the craft out of control or cause it to bounce violently.

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Siphons, exploiting surface tension, remove a discrete amount of plasma to another chamber, where it is spun again and diluted.

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In order to get away, you must first escape the surface tension something with which small, light beings will have particular difficulty.

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Jon Nelson, of Ritsumeikan University, in Japan, has calculated that the most important property involved is the surface tension of the tiny clusters of water molecules from which snowflakes form.

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The younger, impetuous Robin has a few things to learn from the calmer, more experienced Nightwing, though there is obviously some tension bubbling beneath the surface.

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The tension simmered just below the surface and sporadic scuffles broke out, with former England captains Martin Corry and Phil Vickery trading blows and ex-international team-mates Dallaglio and Julian White also squaring up.

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Pros have always varied their string tension a little based on the court surface, weather conditions and their opponent's style of play.

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Already the fuel crisis has helped to bring the tension between Mr Blair and Gordon Brown, his chancellor, to the surface.

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The internal tension between the party's liberals and the left blasted to the surface at the Chicago convention in 1968, when the famous Days of Rage street protesters vilified the party of LBJ and Hubert Humphrey.

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