A brass sphere of mass $ 0.2 \, \mathrm{kg} $ falls freely from a height of $ 20 \mathrm{m} $ and bounces to a height of $ 8 \, \mathrm{m} $ from the ground. If the dissipated energy in this process is absorbed by the sphere, the rise in it's temperature is (specific heat of brass $ =360 \, \mathrm{J} \, \mathrm{kg}^{-1} \, \mathrm{K}^{-1} $ and $ g=10 \, \mathrm{ms}^{-2} $ )