Physics

Problem

A solid sphere floats at the boundary between an upper layer of oil (

\rho=800\,\text{kg}\,\text{m}^{-3}

) and a lower layer of water (

\rho=1000\,\text{kg}\,\text{m}^{-3}

). Half of the sphere’s volume is in the oil and half is in the water. What is the density of the sphere? a)

1000\,\text{kg}\,\text{m}^{-3}

800\,\text{kg}\,\text{m}^{-3}

900\,\text{kg}\,\text{m}^{-3}

850\,\text{kg}\,\text{m}^{-3}