World War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was 2.0 x 1

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World War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was 2.0 x 1

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World War Ii Aircraft Had Instruments With Glowing Radium Painted Dials The Activity Of One Such Instrument Was 2 0 X 1 1
World War Ii Aircraft Had Instruments With Glowing Radium Painted Dials The Activity Of One Such Instrument Was 2 0 X 1 1 (12.25 KiB) Viewed 28 times
World War II aircraft had instruments with glowing radium-painted dials. The activity of one such instrument was 2.0 x 100 Bq when new. (a) What mass (in wg) of 226Ra was present? 9 (b) After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity (in Ba) of this instrument 64.0 years after it was made? Bg
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