10. 0.5 mole of N2 is confined in a volume of 1.0 m³ and undergoes free expansion to a new volume of 2.0 m³. What is the change in entropy of the gas?___(11)___ (J/K)

5. The following metal objects, a disk, a solid sphere, a hollow sphere, and a loop have the same radius and mass. Assuming they are released from the same point on a ramp at rest and start rolling down, which one will take the shortest time to reach the bottom of this ramp? ___(6)___