Activity of a radioactive element is 103 dps. Its half life is 1 sec. After 3 sec its activity will be (dps=decay per second)
Activity of a radioactive sample changes from 1600 to 200 dps in 12 sec. Select the correct statement about this radioactivity process.
After 280 days, the activity of a radioactive sample is 6000 dps. The activity reduces to 3000 dps after another 140 days. The initial activity of the sample (in dps) is,
A 280 days old radioactive substance shows an activity of 6000 dps, 140 days later its activity becomes 3000 dps. What was its initial activity?
After 280 days, the activity of a radioactive sample is 6000dps. The activity reduces to 3000dps after another 140days. The initial activity of the sample in dps is:
Hoe many curies are contained in the radioactive change with activity 18.5×1010 dps?