The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap bubble of surface area 40 cm2, (in J) is

Question

The surface tension of soap solution is 0.03 N/m. The work done in blowing to form a soap bubble of surface area 40 cm2, (in J) is (A)  1.2 × 10-4  (B)  2.4 × 10-4  (C)  12 × 10-4  (D)  24 × 10-4

Tardigrade Admin · Accepted Answer

In case of soap bubble W = T × 2 × Δ A = 0.03 × 2 × 40 × 10-4 = 2.4 × 10-4 J

Q. The surface tension of soap solution is $0.03 N / m$ . The work done in blowing to form a soap bubble of surface area $40 c m^{2}, (in J)$ is

$1.2 \times 1 0^{- 4}$

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

$12 \times 1 0^{- 4}$

$24 \times 1 0^{- 4}$

In case of soap bubble
$W = T \times 2 \times Δ A$
$= 0.03 \times 2 \times 40 \times 1 0^{- 4}$
$= 2.4 \times 1 0^{- 4} J$

Q. The surface tension of soap solution is 0.03N/m. The work done in blowing to form a soap bubble of surface area 40cm2,(inJ) is

1.2×10−4

2.4×10−4

12×10−4

24×10−4