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2. The contact angle for water on clean glass is close to zero. Given that water climbs to a height of 2.28cm in a

2. The contact angle for water on clean glass is close to zero. Given that water climbs to a height of 2.28cm in a clean glass capillary tube with internal radius 0.32 mm at 30C. Calculate the surface tension of water at 30C. dwater (30C)=0.9956 g.cm, g=9.81 m.s,

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