In a lava lamp, a waxy fluid (say Ï= 1225[kg/m3]) is surroundedby another fluid
(say Ï= 1200[kg/m3]), they are mutually insoluble, and they areheated by a lamp in the
bottom of the apparatus. The densities of these materials arevery similar, where the
waxy one is greater at normal room temperature. As the liquidsare heated, the waxy
density becomes less than the surrounding fluid and it rises.What is the buoyant force on
a spherical waxy blob, with radius 0.10[m] in the surroundingfluid? What is the force
due to gravity on this blob? When the blob heats and its densitybecomes 1100[kg/m3],
how much of its volume is submerged? How do the buoyant forceand the force due to
gravity compare now?
