An infinite slab of moderator of thickness 2a contains at its center a thin sheet of 235 u of thickness t. derive the one-group criticality condition, using d and t to represent the diffusion parameters of the moderator σaf and to represent the macroscopic cross section of the ^235 u. plot the thickness t as a function of σaf using the criticality condition. explain the relationship between t and σaf in combinations that lead to a critical system. use eta = 1.80, d = 1.0 cm,| l = 56 cm, and a = 15 cm.

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.

the following is queen elizabeth’s purposes:

- to encourage the parliament that the technique of picking successors to the seat based merely on birthright needs to be reviewed.

- (not) to convince the parliament that her kid should not be measured as a likely choice for heir to the english power.

- to persuade the parliament that merely since she has a child does not assure that the kid will be a capable leader.

- to sway the parliament how shattering it could be if they proceeded discourteously concerning her or her child.

inverse v=i*r

nice nice