1.

Mercury has an angleof contact equal to 140^(@) with soda lime glass . A narrow tube of radius 1.00 mm made of this glass is dipped in a trough containing mercury .By what amount does the mercury dip down in the tube relative to the liquid surface outside ?Surface tension of mercury at the temperature of the experiment is 0.465Nm^(-1) . Density of mercury =13.6xx10^(3)kgm^(-3)

Answer» <html><body><p></p>Solution :Here , angle of <a href="https://interviewquestions.tuteehub.com/tag/contact-25916" style="font-weight:bold;" target="_blank" title="Click to know more about CONTACT">CONTACT</a> `theta=140^(@)`<br/>Radius of <a href="https://interviewquestions.tuteehub.com/tag/narrow-1110745" style="font-weight:bold;" target="_blank" title="Click to know more about NARROW">NARROW</a> tube `r=1mm=<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)m`<br/>Surface <a href="https://interviewquestions.tuteehub.com/tag/tension-1241727" style="font-weight:bold;" target="_blank" title="Click to know more about TENSION">TENSION</a> `T=0.465Nm^(-1)`<br/> <a href="https://interviewquestions.tuteehub.com/tag/density-17451" style="font-weight:bold;" target="_blank" title="Click to know more about DENSITY">DENSITY</a> of mercury `rho=13.6xx10^(3)kgm^(-3)` <br/>Height of liquid in narrow tube of radius r,<br/>`h=(2Tcostheta)/(rrhog)`<br/>`=(2xx0.465xxcos140^(@))/(10^(-3)xx13.6xx10^(3)xx9.8)`<br/>`=0.00534498`<br/>`=-5.34xx10^(-3)m`<br/>Negative sign shows that the mercury level is depressed in the tube.</body></html>


Discussion

No Comment Found

Related InterviewSolutions