World War II aircraft had instruments with glowing radium-painted dials (see figure below). The activity of one such instrument was 1.3x105 Bq when new. What mass of 226Ra was present? Submit Answer After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity of this instrument 47.0 years after it was made? Submit Answer

World War II aircraft had instruments with glowing radium-painted dials (see figure below). The activity of one such instrument was 1.3x105 Bq when new. What mass of 226Ra was present? Submit Answer After some years, the phosphors on the dials deteriorated chemically, but the radium did not escape. What is the activity of this instrument 47.0 years after it was made? Submit Answer

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter10: Nuclear Physics

Section: Chapter Questions

Problem 41P: World War II aircraft bad instruments with glowing radium-painted dials. The activity of one such...

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