Pls explain me this questionOn heating water, bubbles being formed at the bottom of the vessel detach and rise - Physics - Mechanical Properties of Fluids

Question

Pls explain me this questionOn heating water, bubbles being
formed at the bottom of the vessel detach and rise Consider the
bubbles to be spheres of radiusRand making a circular contact of
radiusrwith the bottom of the vessel IfrR, and the surface tension
of water isT, value ofrjust before the bubbles detach is(density of
water isρw)

Jyoti Pant · Accepted Answer

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Buoyancy force on bubble is given by∫Tdl
sinθT×2πr×rR=43πR3ρwg(Using m=volume x
density and F=mg)or r2=23R4ρwgTor r=R223×ρwgT