The surface tension of water at 20°C is 75 x 10-3 N/m. The difference in water surfaces within and outside an open- ended capillary tube of 1 mm internal bore, inserted at the water surface, would nearly be

The surface tension of water at 20°C is 75 x 10-3 N/m. The difference

1.	The surface tension of water at 20°C is 75 x 10-3 N/m. The difference in water surfaces within and outside an open- ended capillary tube of 1 mm internal bore, inserted at the water surface, would nearly be
A.	7 mm
B.	11 mm
C.	15 mm
D.	19 mm
Answer» D. 19 mm