(On request: Fiaza Ali)
Q- A spherical brass shell of mass 2.50 kg barely floats in water such that it is completely submerged with the waterline just at its top. The inside of the shell is completely evacuated. The density of brass is 8600 kg/m3 and that of water is 1000 kg/m3.
(a) calculate the outer radius of the shell R2
(b) calculate the inner radius R1
(c) If the inner cavity is filled with helium should the shell float higher, sink of remain in the place.
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