A-Level
EDEXCEL
Physics
January 2019
1 Marks
QP-201901-Physics-U5-old · Question 5
Question (excerpt):
DO NOT WRITE IN THIS AR NOT WRITE IN THIS AREA 5 The half-life of protactinium is 70 s. After which of the times below would the activity of a sample of protactinium have decreased to less than 2% of …
DO NOT WRITE IN THIS AR NOT WRITE IN THIS AREA 5 The half-life of protactinium is 70 s. After which of the times below would the activity of a sample of protactinium have decreased to less than 2% of …
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