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JEE Main 201412 AprilOnline

Exam: JEE Main
Year: 2014
Date: 12 April
Mode: Online
Subject: Physics
Chapter: Mechanical Properties of Fluids

JEE Main 2014 · 12 April · Online · Physics · Mechanical Properties of Fluids

Two soap bubbles coalesce to form a single bubble. If V is the...

Two soap bubbles coalesce to form a single bubble. If

\mathrm{V}

is the subsequent change in volume of contained air and

\mathrm{S}

change in total surface area,

\mathrm{T}

is the surface tension and

\mathrm{P}

atmospheric pressure, then which of the following relation is correct?

Options

A $4 \mathrm{PV}+3 \mathrm{ST}=0$
B $3 \mathrm{PV}+4 \mathrm{ST}=0$
C $2 \mathrm{PV}+3 \mathrm{ST}=0$
D $3 \mathrm{PV}+2 \mathrm{ST}=0$

Correct answer

B. $3 \mathrm{PV}+4 \mathrm{ST}=0$

Step-by-step solution

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