If the surface tension of water is 0.06 Nm-1, then the capillary rise in a tube of diameter 1 mm is ( θ=0° )

(a) 1.22 cm                                (b) 2.44 cm
(c) 3.12 cm                                (d) 3.86 cm

(b) h=2Trdg=2×6×10-25×10-4×103×10=2.4×10-2 m=2.4 cm

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