Answer to Question #161424 in Physics for John

Question

The data recorded in the table below gives results for the activity of a short lived radioactive isotope. Activity is the number of emissions/second its units are the Becquerel which equals 1 emission/second. Use the data to draw a graph of count rate against time for the short lived radioactive isotope. 

 

• Use your graph to calculate a value of the half-life of this isotope. 

• Calculate decay constant for this material. Show all calculations.  

Time (seconds) Activity (Becquerels)

0 400

20 330

40 270

60 220

80 190

100 150

120 120

140 100

160 90

180 80

200 70

220 60

240 50

Answer 1

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