The disintegration rate of a certain radioactive sample at any instant is $4750$ dpm. Five minutes later, the rate becomes $2700$ dpm. Calculate half life of sample.

Q. The disintegration rate of a certain radioactive sample at any instant is 4750 dpm (disintegration per minute). Five minutes later, the rate becomes 2700 dpm. Calculate half-life of sample.

Q. The disintegration rate of a certain radioactive sample at any instant is 4750 dpm. Five minutes later, the rate becomes 2700 dpm. The half life of sample is :

Q. The disintegration rate of a certain radioactive sample at any instant is $6000$ disintegrations per minute. Five minutes later the rate becomes $2400$ per minute

Q. A radioactive sample at any instant has its disintegration rate $5000$ disintegration per minute. After $5$ minutes, the rate is $1250$ disintegrations per minute. Then, the decay constant, per minute, is

Q. A counter rate meter is used to measure the activity of a radioactive sample. At a certain instant, the count rate was recorded as $475$ counters per minute. Five minutes later, the count rate recorded was $270$ counts per minute. Calculate the decay constant and half life period of the sample.