Half life of a sample is 20 minutes. In how much time will the acitivity of sample drop to `1//16` of its initial value?

A radioactive sample has a half-life of 20 years. The time at which the activity of the sample will reduce to 10% of its initial value is

The half-life of ^215At is 100mus . The time taken for the activity of a sample of ^215At to decay to 1/16th of its initial value is

The half-life of ^215At is 100mus . The time taken for the activity of a sample of ^215At to decay to 1/16th of its initial value is

A radioactive element has a half life of 20 minutes, How much time should elapse before the element is reduced to 1//8 of its original value

The half-life of At^215 is 100 mus .The time taken for the radioactivity of a sample of the element to decay 1/16 th of its initial value is

The half - life of ^(215) At is 100 mu , s. The time taken for the radioactivity of a sample of ^(215) At to dacay to 1//16^(th) of its initialy value is

The half life of a radioactive substance is 20s, the time taken for the sample to decay by 7//8^(th) of its initial value is

The half life of a radioactive substance is 20s, the time taken for the sample to decay by 7//8^(th) of its initial value is