Current location - Health Road Network - Medical equipment enterprise - If the mass of a radioactive substance decays by 3% every day, how many days will it take for the substance to decay to less than half of its original mass?
If the mass of a radioactive substance decays by 3% every day, how many days will it take for the substance to decay to less than half of its original mass?
Let the time required for decay to half be t, then:
m( 1-3%)^t= 1/2m
( 1-3%)^t= 1/2
t=23
Therefore, it takes at least 23 days for this substance to decay to less than half of its original mass.