9. 2.00 kg of water is warmed from 20.0 °C up to 80 °C. What is the change in entropy \( \Delta S \) of the water? (The specific heat of water is c = 4.19 kJ/kg·K)

10. Several objects (a hoop, a solid cylinder, a solid sphere, and a thin spherical shell) roll, without slipping down an incline of vertical height H, all starting from rest at the same moment. In addition a box slides down without friction. In what order do they reach the bottom of the incline?