A spherical nucleus forms during a solid-state transformation and it is determined that y = 0.2 J/m^ and AGy = -6.5 x 10^ J/m^. Assume homogeneous nucleation. a. What is the radius of the nucleus of...

A spherical nucleus forms during a solid-state transformation and it is determined that y = 0.2 J/m^ and AGy = -6.5 x 10^ J/m^. Assume homogeneous nucleation.

a. What is the radius of the nucleus of critical size?

b. What is the magnitude of the nucleation energy barrier?