A radioactive substance has a half-life of `h` days. Find a formula for its mass `m` in terms of time `t` if the initial mass is `m_0`. What is its initial decay rate?

A radioactive elements has a half life of 2500 yrs. In how many years will its mass decay by 90% of its initial mass?

A radioactive substance has a half-life of 64.8 h. A sample containing this isotope has an initial activity (t=0) of 40muCi . Calculate the number of nuclei that decay in the time interval between t_1=10.0h and t_2=12.0h .

A radioactive substance has a half-life of 64.8 h. A sample containing this isotope has an initial activity (t=0) of 40muCi . Calculate the number of nuclei that decay in the time interval between t_1=10.0h and t_2=12.0h .

A radioactive substance decays to 1/32 of its initial value in 25 days. Calculate its half life.

A radioactive substance decays to 1//32 th initial activity in 25 days.Calculate its half life.

A radioactive substance decays to [1/16^(th)] of its initial quantity in 108 minutes. Find its half line

A radioactive substance decays to 1/16 th of its initial mass in 40 days. The half life of the substance, in days, is?

A radioactive substance decays to 1/16 th of the initial mass in 40 days. The half life of the substance is….. Day.