'Place the letter of th item in Column II on th line before its best match in Column I'

Column I:
37. moderator
38. coolant
39. control rod
40. critical mass

Column II:
a. removes heat from reactor
b. slows neutrons produced by fission
c. limits number of free neutrons
d. amount of uranium needed to sustain a chain reaction

I reallyy need help with this!
Thanks
-MC

2 answers

b;a;c;d

:D Thanks!!!

-MC

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