A radioactive substance has a half-life of 3 minutes. After 9 minutes, the count rate was observed to be 200. What was the count rate at zero time?

Judemik

3 years ago

let x be the count at zero .then at 3s x/2 .at 6s x/4 at 9s x/8 .x/8=200 ans 1600

Newton2i

2 years ago

200(1/3) 200(1/6) 200(1/9)
n/no =. (1/2)^n
N / No = (1/2) x 3
200/ No = 1/ 8
No = 200 x 8 = 1600

Goodneewz

2 years ago

Can you please give the solution to this question

Dammilola123

3 months ago

How the u get 8

jafarluqman

2 years ago

Can anyone explain