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DAY 9 TEST AVAILABLE BELOW THIS TEST
Day 9 Nuclear Physics P2
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Q1:When an animal dies each gram of carbon in its body emits about 16 beta particles each minutes. Each gram of carbon from same animal remains is found to emit 4 beta particles per minutes. How old is the animal (half life of radioactive carbon is 6000 years)?
A) 3000
B) 6000
C) 12000
D) 18000
C) 12000
Q2: Calculate the activity (Decaying atom per unit time) of radioactive strontium-90 having 6.7 x 10²¹ atom at t=0 decay constant of strontium-90 is 8.3 x 10^-10 s-¹.
A) 12 x 10¹¹ Bq
B) 5.6 x 10¹¹ s-¹
C) 8.01 x 10^10 Bq
D) 5.6 x 10¹² Bq
Ans : 5.6 x 10¹² Bq
A = -Lemda Nó
A = 8.3 x 10^-10 × 6.7 x 10²¹
A = 55.6 ×10¹¹
A = 5.6 × 10¹²
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