If a section of a soap bubble (of radius R) t | vedclass

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Question

(B) soap bubble has two surfaces (inner and outer) in contact with air.When we consider a cross-section through the center of a soap bubble of radius

Vedclass · Accepted Answer

$4\pi RT$

Vedclass · Answer

(B) soap bubble has two surfaces (inner and outer) in contact with air.When we consider a cross-section through the center of a soap bubble of radius $R$, the circumference of the section is $2\pi R$.Since there are two surfaces, the total length over which the surface tension $T$ acts is $2 	imes (2\pi R) = 4\pi R$.The force due to surface tension is given by $F = T 	imes (	ext{total length})$.Therefore, $F = T 	imes 4\pi R = 4\pi RT$.

If a section of a soap bubble (of radius $R$) through its center is considered, then the force on one half due to surface tension is

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