Answered: r measures 80 counts per minute. After…

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r measures 80 counts per minute. After TWO hours have gone by, what counts will the Geiger counter register? FULLY EXPL

Astronomy

1st Edition

ISBN:9781938168284

Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Publisher:Andrew Fraknoi; David Morrison; Sidney C. Wolff

Chapter16: The Sun: A Nuclear Powerhouse

Section: Chapter Questions

Problem 38E: Raymond Davis Jr.’s neutrino detector contained approximately 1030 chlorine atoms. During his...

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Question

At iThemba LABS a scientist placed a radio-isotope (with a halflife of ONE hour) near a Geiger counter and she observes that the Geiger counter measures 80 counts per minute. After TWO hours have gone by, what counts will the Geiger counter register? FULLY EXPLAIN

A. 20 counts/min
B. Zero counts/min
C. 40 counts/min
D. 80 counts/min

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