<P> For a water - filled glass tube in air at standard laboratory conditions, γ = 0.0728 N / m at 20 ° C, ρ = 1000 kg / m, and g = 9.81 m / s . For these values, the height of the water column is </P> <Dl> <Dd> h ≈ 1.48 × 10 − 5 r m . (\ displaystyle h \ approx ((1.48 \ times 10 ^ (- 5)) \ over r) \ (\ mbox (m)).) </Dd> </Dl> <Dd> h ≈ 1.48 × 10 − 5 r m . (\ displaystyle h \ approx ((1.48 \ times 10 ^ (- 5)) \ over r) \ (\ mbox (m)).) </Dd> <P> Thus for a 2 m (6.6 ft) radius glass tube in lab conditions given above, the water would rise an unnoticeable 0.007 mm (0.00028 in). However, for a 2 cm (0.79 in) radius tube, the water would rise 0.7 mm (0.028 in), and for a 0.2 mm (0.0079 in) radius tube, the water would rise 70 mm (2.8 in). </P>

The attraction of water particles to each other