If the surface tension of water-air interface is 0.073 N/m, the gauge pressure inside a rain drop of 1 mm diameter will be

If the surface tension of water-air interface is 0.073 N/m, the gauge

1.	If the surface tension of water-air interface is 0.073 N/m, the gauge pressure inside a rain drop of 1 mm diameter will be
A.	0.146 N/m2
B.	73 N/m2
C.	292 N/m2
D.	146 N/m2
Answer» D. 146 N/m2