Electronics and Modern Physics
Question 1 of 5
Time left:
00:00
✓
Free Physics Q & A Practice
1 of 5 free exam-style exercises in this topic
A radioactive sample has a half-life of 6 h. Its count rate is initially 960 counts min⁻¹. What is the count rate after 18 h, neglecting background?
Initial count rate / min⁻¹
Half-life / h
Elapsed time / h
960
6
18
Select one option.
A
480 counts min⁻¹
B
240 counts min⁻¹
C
60 counts min⁻¹
D
30 counts min⁻¹
E
120 counts min⁻¹
Submit
You have used 0 of 1 attempt
Show Explanation
Next
▶