Questions
A small spherical droplet of density d is floating exactly half immersed in a liquid of density and surface tension T. The radius of the droplet is (take note that the surface tension applies an upward force on the droplet)
detailed solution
Correct option is D
Weight is balanced by Buoyancy force &surface tension forces ⇒mg=FB+FST⇒mg=Vimρg+T×2πR ⇒Vdg=V2ρg+T×2πR⇒Vd−ρ2g=T×2πR ⇒43πR32d−ρ2g=T×2πR ⇒R=3T2d−ρgTalk to our academic expert!
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