NEET Class neet Answered
please answer this
Asked by Prashant DIGHE | 14 Jan, 2020, 10:12: PM
Expert Answer
From figure we see half life period ( time taken from initial 100 cpm to 50 cpm ) = 3 hour
( cpm :- counts per minute )
Total counts ia area under part of the curve curve DC . This area ABCD is approximately trapezium
area or Total count = (1/2) ( AD + BC ) AB = (1/2) ( 150 ) 3 = 225
Hence answer (3) 3 hour , 235 counts
Answered by Thiyagarajan K | 15 Jan, 2020, 08:19: AM
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