damiilare3217 damiilare3217

23-04-2024
Physics

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World War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was 1.1 ×105Bq when new. The half-life of radium-226 is 1600y . What was the mass of the radium-226, in grams, on the dial, when new?

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