If excess pressure is balanced by a column of oil (with specific gravity 0.8) 4 mm high, where R = 2.0 cm, Find the surface tension of the soap bubble.

If excess pressure is balanced by a column of oil (with specific gravi

1.	If excess pressure is balanced by a column of oil (with specific gravity 0.8) 4 mm high, where R = 2.0 cm, Find the surface tension of the soap bubble.
Answer» <html><body><p><<a href="https://interviewquestions.tuteehub.com/tag/p-588962" style="font-weight:bold;" target="_blank" title="Click to know more about P">P</a>></p>Solution :The excess of pressure inside the <a href="https://interviewquestions.tuteehub.com/tag/soap-11667" style="font-weight:bold;" target="_blank" title="Click to know more about SOAP">SOAP</a> bubble is <br/> `"" DeltaP = P_(2) - P_(1) = (4T)/R` <br/> But `"" DeltaP = P_1 - P_1 = rho <a href="https://interviewquestions.tuteehub.com/tag/gh-468237" style="font-weight:bold;" target="_blank" title="Click to know more about GH">GH</a> implies rho gh = (4T)/R` <br/> `implies "surface tension" , T = (rho gh R)/4 = ((800)(9.8)(4 <a href="https://interviewquestions.tuteehub.com/tag/xx-747671" style="font-weight:bold;" target="_blank" title="Click to know more about XX">XX</a> <a href="https://interviewquestions.tuteehub.com/tag/10-261113" style="font-weight:bold;" target="_blank" title="Click to know more about 10">10</a>^(-3))(2 xx 10^(-2)))/(4)` <br/> `T = 15.68 xx 10^(-2) Nm^(-1)`</body></html>