What work must be done against surface tension forces to blow out a bubble with a diameter of 5.10-2 m?

To find the value of the work against the forces of surface tension for blowing out the indicated bubble, we use the formula: A = Ϭ * ΔS = Ϭ * 2 * Π * d ^ 2.

Constants and variables: Ϭ – coeff. surface tension (for soap solution Ϭ = 0.04 N / m); d – the diameter of the blown bubble (d = 5 * 10 ^ -2 m).

Let’s perform the calculation: A = Ϭ * 2 * Π * d ^ 2 = 0.04 * 2 * 3.14 * (5 * 10 ^ -2) ^ 2 = 628 * 10 ^ -6 J.

Answer: To blow out the indicated bubble, it is required to perform work of 628 μJ.