(a) 3.9 N/m (b) 3.9 ×10–2 N/m (c) 3.9 ×10–3 N/m (d) 3.9 dyne/m Ans. b (4)
28. If the excess pressure inside a soap bubble is balanced by oil column of height 2 mm
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- 28. If the excess pressure inside a soap bubble is balanced by oil column of height 2 mm