Neutron moderation is used to counteract: A. the low concentration of uranium-235 in nature.

B. the heat generated during nuclear fission reactions.

C. the chain reactions that naturally occur with uranium-235.

D. the minimal chance that the newly formed neutrons of a fission
reaction are absorbed by more atoms.

Explanation for basic character?

Choose all the answers that apply. as ocean depth increases, temperature decreases temperature increases pressure increases pressure decreases salinity increases density increases

Lab reagent, hypothesis test. a reference solution used as a lab reagent is purported to have a concentration of 5 mg/dl. six samples are taken from this solution and the following concentrations are recorded: (5.32, 4.88, 5.10, 4.73, 5.15, 4.75) mg/dl. these six measurements are assumed to be an srs of all possible measurements from solution. they are also assumed to have a standard deviation of 0.2, a normal distributin, and a mean concentration equal to the true concentration of the solution. carry out a significance test to determine whether these six measurements provide reliable evidence that the true concentration of the solution is actually not 5 mg/dl.