75% of a radioactive element decays in 6 hours. Its half life period is __________ hours.
A. $$\frac{3}{4}$$
B. $$\frac{1}{6}$$
C. 3
D. 4
Answer: Option C
Related Questions on Nuclear Power Engineering
Heavy water (D2O) in a nuclear reactor serves as a
A. Coolant
B. Moderator
C. Both A & B
D. Neutron absorber
Moderating material used in a thermal-reactor should be a
A. Good absorber of neutrons
B. Solid substance
C. Poor absorber of neutrons
D. None of these
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