The diameter if a soap bubble is 5cm.The excess pressure inside the bu

1.	The diameter if a soap bubble is 5cm.The excess pressure inside the bubble is 2bar.Find the surface tension of the surface film of the bubble.
Answer» $\mathtt{\huge\fbox{Solution :}}$ Given, Diameter of soap bubble = 5 cm So, radius of soap bubble = 2.5 cm = 0.025 m The excess pressure inside the bubble = 2 bar We know that, the excess pressure inside the bubble is given by $\large{\mathtt{ \underline{\fbox{p_{i} -p _{o} = \frac{2t}{r} }}}}$ Where, (Pi - PO) is excess pressure inside the soap bubble t is the surface tension r is the radius of soap bubble Substitute the known values , we get $\sf \mapsto2 = \frac{2t}{0.025} \\ \\\sf \mapsto t = 0.025 \: newton \: per \: meter$ HENCE, the surface tension is 0.025 newton/meter

The diameter if a soap bubble is 5cm.The excess pressure inside the bubble is 2bar.Find the surface tension of the surface film of the bubble.

Answer»

$\mathtt{\huge\fbox{Solution :}}$

Given,

Diameter of soap bubble = 5 cm

So, radius of soap bubble = 2.5 cm = 0.025 m

The excess pressure inside the bubble = 2 bar

We know that, the excess pressure inside the bubble is given by

$\large{\mathtt{ \underline{\fbox{p_{i} -p _{o} = \frac{2t}{r} }}}}$

Where,

(Pi - PO) is excess pressure inside the soap bubble
t is the surface tension
r is the radius of soap bubble

Substitute the known values , we get

$\sf \mapsto2 = \frac{2t}{0.025} \\ \\\sf \mapsto t = 0.025 \: newton \: per \: meter$

HENCE, the surface tension is 0.025 newton/meter

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The diameter if a soap bubble is 5cm.The excess pressure inside the bubble is 2bar.Find the surface tension of the surface film of the bubble.

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