Radioactive substances are used in the generation of electricity.
State two other uses of radioactive substances.
Figure 1 is a diagram of a nuclear reactor, used in the generation of electricity.
Figure 1
P may be used to shut down the reactor when necessary.
Q slows down neutrons to enable a chain reaction to take place.
State the name of the two parts labelled P and Q.
P ..........................................................
Q ..........................................................
Explain how neutrons enable a nuclear chain reaction to take place.
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