A hollow plastic sphere has a mass of and encloses of air

PHYSICS · Single correct · AP · Physics 1: Algebra-based · Fluids · Fluids

Problem

A hollow plastic sphere has a mass of

0.30\,\text{kg}

and encloses

5.0\times10^{-4}\,\text{m}^3

of air. Approximately how much additional mass must be placed inside the sphere so that it is just neutrally buoyant in freshwater? (a)

0.80\,\text{kg}

(b)

0.15\,\text{kg}

(c)

0.20\,\text{kg}

(d)

0.50\,\text{kg}