A soap bubble, having radius of 1 mm, is blown from a detergent solution having a surface tension of 2.5 10 -2 N/m. The pressure inside the bubble equals at a point z 0 below the free surface of water in a container. Taking g = 10 m/s 2 , density of water = 10 3 kg/m 3 , the value of z 0 is :

1. A. 0.5 cm
2. B. 100 cm
3. C. 10 cm
4. D. 1 cm

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