Uses of radioactivity

Question 1

What is the equation for ‘count rate’?

Answer 1

Count rate= initial count rate/2^n

Question 2

What is the equation for the number of un-decayed nuclei?

Answer 2

Number of un-decayed nuclei=initial number/2^n

Question 3

Give four uses of radioactivity.

Answer 3

Detecting leaks in pipes
Smoke alarms
Thickness monitoring in industry
Carbon dating
Uranium dating
Gamma rays in medicines
Gamma imaging/framing