Changing the shape A mass may be exactly critical without being a perfect homogeneous sphere. More closely refining the shape toward a perfect sphere will make the mass supercritical. Conversely changing the shape to a less perfect sphere will decrease its reactivity and make it subcritical.
Changing the shape A mass may be exactly c.ritical without being a perfect homogeneous sphere. More closely refining the shape toward a perfect sphere will make the mass supercritical Conversely changing the shape to a less perfect sphere will decrease its reactivity and make it subcritical.