Nuclear Power Engineering
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher

Melting point, hence can be subjected to higher temperature
Density ; hence core volume for a given power output would be smaller
Resistance to effects of irradiation
All of these

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Nuclear Power Engineering
The half life period of a radioactive substance is best determined by counting the number of alpha particles emitted per second in a Geiger Muller counter from its known quantity. If the half life period of a radioactive substance is one month, then

3/4th of it will disintegrate in two months
L/8th of it will remain intact at the end of four months
It will completely disintegrate in four months
It will completely disintegrate in two months

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