The surface tension of soap solution is 0.03 | vedclass

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Question

(B) The surface tension of the soap solution is given as $T = 0.03 \,N/m$. The surface area of the soap bubble is $A = 40 \,cm^2 = 40 	imes 10^{-4} \

Vedclass · Accepted Answer

$2.4 	imes 10^{-4}$

Vedclass · Answer

(B) The surface tension of the soap solution is given as $T = 0.03 \,N/m$. The surface area of the soap bubble is $A = 40 \,cm^2 = 40 	imes 10^{-4} \,m^2$. $A$ soap bubble has two surfaces (inner and outer), so the change in surface area is $\Delta A = 2 	imes A$. The work done $W$ in blowing the soap bubble is given by the formula: $W = T 	imes \Delta A_{total} = T 	imes 2 	imes A$. Substituting the values: $W = 0.03 	imes 2 	imes 40 	imes 10^{-4} \,J$. $W = 0.06 	imes 40 	imes 10^{-4} \,J$. $W = 2.4 	imes 10^{-4} \,J$.

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

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