Control rods in a nuclear reactor are used to
A) absorb neutrons and slow down fission.
B) absorb neutrons and speed up fission.
C) release neutrons and slow down fission.
D) release neutrons and speed up fission.
Question 2
What chemical compound is used to bleach hair?
A) hydrogen peroxide
B) sodium hypochlorite
C) melanin
D) thioglycolic acid