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.

Which material produces static charge when rubbed ?

How much energy is made when a pice of wood burns. how do you know

Look at the spectrums of a star moving towards earth and a motionless star. which of these is a correct inference that can be draw from the observation of the two spectrums? (2 points) the spectrum of a motionless star is difficult to be viewed separately using oridinary telescopes. the spectrum of a motionless star is identical to the spectrum of a star which moves towards earth. the spectrum of a star shifts towards the red region when the star moves towards earth. the spectrum of a star shifts towards the blue region when the star moves towards earth.