Question

Two spheres P and Q of equal radii have densities ????₁ and ????₂,
respectively. The spheres are connected by a massless string and
placed in liquids L₁ and L₂ of densities σ₁ and σ₂ and viscosities η₁ and
η₂, respectively. They float in equilibrium with the sphere P in L₁ and
sphere Q in L₂ and the string being taut (see figure). If sphere P alone in
L₂ has terminal velocity ￫ Vᴘ and Q alone in L1 has terminal velocity ￫ V???? then
(A) │￫ Vᴘ│/ │￫ V????│ = η₁/ η₂
(B) │￫ Vᴘ│/ │￫ V????│ = η₂/η₁
(C) ￫ Vᴘ .￫ V???? > 0
(D) ￫ Vᴘ .￫ V???? < 0

Answer 1

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