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Excess pressure

What is the excess pressure inside a soap bubble with a radius

Question

Medium

Solving time: 3 mins

What is the excess pressure inside a soap bubble with a radius of $1.5 c m$ and the surface tension of $0.03 N / m$ ?

7 p a

3 p a

2 p a

8 p a

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What is the excess pressure inside a soap bubble with a radius of

1.5 c m

and the surface tension of

0.03 N / m

14 mins ago

Discuss this question LIVE

14 mins ago

Text solutionVerified

Under equilibrium, a static soap bubble has an internal pressure,

P = \frac{4 T}{R}

Where

P

is the excess pressure, T is the tension and R is the radius of the sphere.

So for a bubble of radius 1.5cm or 0.015m and tension

0.03 N m^{-- 1}

we get,

Δ P = \frac{4 \times 0.03}{0.015} = 8 P a

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Question Text	What is the excess pressure inside a soap bubble with a radius of $1.5 c m$ and the surface tension of $0.03 N / m$ ?
Topic	Mechanical Properties of Fluids
Subject	Physics
Class	Class 11
Answer Type	Text solution:1
Upvotes	74

What is the excess pressure inside a soap bubble with a radius of $1.5 c m$ and the surface tension of $0.03 N / m$ ?

Text solutionVerified

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