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10 cards from this deck
Unstable nuclei releasing energy to become more stable
2–10cm2 – 10 cm2–10cm
Paper
1m~1 m 1m
Aluminium foil (~3 mm thick)
No
Several metres of concrete or several inches of lead
Monitoring material thickness (e.g., aluminium foil production)
Diagnostic imaging, sterilisation, cancer treatment
I=kx2I = \frac{k}{x^2}I=x2k
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