Physics

Problem

Identical solid metal spheres are heated to

150\,^{\circ}\!\text{C}

and then suspended in three different environments maintained at

20\,^{\circ}\!\text{C}

. I. A matte black sphere in still air II. A polished shiny sphere in still air III. A polished shiny sphere in air moving at

5\,\text{m\,s}^{-1}

Neglecting other differences, which ranking correctly orders the spheres by the rate at which they lose energy, from fastest to slowest? a)

\displaystyle III > I > II

\displaystyle I > III > II

\displaystyle I > II > III

\displaystyle II > III > I