A soap bubble in air (two surfaces) has surface tension 0.03 text Nm-1 . Find the gauge pressure inside a bubble of diameter 30 mm .

Question

A soap bubble in air (two surfaces) has surface tension 0.03 text Nm-1 . Find the gauge pressure inside a bubble of diameter 30 mm . (A) 2 Pa (B) 4 Pa (C) 16 Pa (D) 10 Pa

Tardigrade Admin · Accepted Answer

Gauge pressure =(4T/R)=(4× 0.03/(30)2× 10-3)=8 Pa

Q. A soap bubble in air (two surfaces) has surface tension $0.03 N m^{- 1}$ . Find the gauge pressure inside a bubble of diameter $30 mm$ .

2 Pa

4 Pa

16 Pa

10 Pa

8 Pa

Gauge pressure $= \frac{4 T}{R} = \frac{4 \times 0.03}{\frac{30}{2} \times 10 ^{- 3}} = 8 P a$

Q. A soap bubble in air (two surfaces) has surface tension 0.03Nm−1 . Find the gauge pressure inside a bubble of diameter 30mm .