OBLEM 3. The Lady-Godiva sphere is made of uranium that is 90% enriched in U-235. The density of this fuel is 18.75 g/cm3 . a) Calculate neutron reproduction factor for this uranium composition. b) Determine infinite neutron multiplication factor of the assembly. c) What is the diffusion length of fast neutrons in this fuel

answer;

d. are made mostly of liquid

explanation;

-the general   composition and structure planets includes; they have a thick gas and liquid layer covering a small,solid core. mostly the gases are hydrogen and helium atmosphere and layers of liquid hydrogen. for instance neptune and uranus are examples of the outer planets, they have a core covered by ice and ammonia.

-neptune's atmosphere is hydrogen and helium with a bit of methane so there is no oxygen to breath and the interior is made up of frozen water and ammonia with a rock and iron core. thus, there is no liquid water or solid surface to survive.

490 n

f=125n a=2.5m/s2