
 Example 9.1
 Part A
 At del_t = 0, there is no supercooling. So there is no critical radius

 Part B
 Critical free energy of nucleation is 2.2e-16J
 Critical radius is 262 angstrom

 Part C
 Critical free energy of nucleation is 3.4e-18J
 Critical radius is 33 angstrom. 