What is the work done in blowing to from a soap bubble of surface area 40 c m2 ? Take surface tension of the soap solution as 0.03 N m- 1 .

Question

What is the work done in blowing to from a soap bubble of surface area 40 c m2 ? Take surface tension of the soap solution as 0.03 N m- 1 . (A) 2.4× 10- 4 J (B) 1.2× 10- 2 J (C) 3.6× 10- 4 J (D) 4.2× 10- 4 J

Tardigrade Admin · Accepted Answer

Here, surface tension, S =0.03 N m -1 Surface area =40 cm 2=40 × 10-4 m 2 Work done = surface tension × change in surface area 0.03 × 240 × 10-4 J =2.4 × 10-4 J

Q. What is the work done in blowing to from a soap bubble of surface area $40 c m^{2}$ ? Take surface tension of the soap solution as $0.03 N m^{- 1}$ .

$2.4 \times 1 0^{- 4} J$

$1.2 \times 1 0^{- 2} J$

$3.6 \times 1 0^{- 4} J$

$4.2 \times 1 0^{- 4} J$

Here, surface tension, $S = 0.03 N m^{- 1}$
Surface area $= 40 c m^{2} = 40 \times 1 0^{- 4} m^{2}$
Work done $=$ surface tension $\times$ change in surface area
$0.03 \times 240 \times 1 0^{- 4} J = 2.4 \times 1 0^{- 4} J$

Q. What is the work done in blowing to from a soap bubble of surface area 40cm2 ? Take surface tension of the soap solution as 0.03Nm−1 .

2.4×10−4J

1.2×10−2J

3.6×10−4J

4.2×10−4J