Half life of radioactive substance is `3.20` h. What is the time taken for `75%` substance to be used?

Define half life of a radioactive substance.

The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3//4^(th) of its original mass ?

The half life of a radioactive substance is 30 days. What is the time taken to disintegrate to 3//4^(th) of its original mass ?

Define half-life of a radioactive substance.

The half-life period of a radioactive substance is 30 days. What is the time taken for 3/4 the of its original masss to disintegrate ?

The half - life period of a radioactive substance is 20 days. What is the time taken for 7//8^(th) of its original mass to disintegrate ?

The half-life period of a radioactive substance is 20 days. What is the time taken for 7//8th of its original mass to disintergrate?

The half-life of a radioactive substance is 10 days. This means that

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