GATE-2017 (72)
72) The number of half-lives (T 1/2 ) required for a certain amount of radioactive isotopes in a rock to reduce to 3% of its original amount is_____ (Thanks to Chandrasekhar, ANU) Solution: …
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Showing posts with the label Radioactivity
Radioactivity
6) If the observed counting rate of a radioactive sample is 7.4 × 10 4 counts per second, then the disintegration rate in Becquerel, assuming a counting efficiency of 20% will be (1 Becquerel = 2…
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