Question

Derive an expression for the mean life of a radioactive substance.​

Answer 1

Answer:

Formulas of Calculating Radioactivity Mean Life

The mean life of an element equals the half-life of the substance divided by the natural logarithm of 2 which is about 0.693. In fact, the mean life turns out to equal the number τ which appears in the exponential term e−t/τ involved in the description of decay or growth.

Answer 2

Answer:

Derivation of mean life of radioactive substance

Formulas of Calculating Radioactivity Mean Life

The mean life of an element equals the half-life of the substance divided by the natural logarithm of 2 which is about 0.693. In fact, the mean life turns out to equal the number τ which appears in the exponential term e−t/τ involved in the description of decay or growth.