Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.

QUESTION

# What is the half life formula?

N(t) = N(0) * 0.5^(t/(T))

The general equation with half life=

N(t) = N(0) * 0.5^(t/(T))

In which N(0) is the number of atoms you start with, and N(t) the number of atoms left after a certain time t for a nuclide with a half life of T.

You can replace the N with the activity (Becquerel) or a dose rate of a substance, as long as you use the same units for N(t) and N(0).

Another equation you might come across is:

N(t) = N(0) * e^(-lambda*t)

in which lambda (lambda) is the exponential decay constant. You can calculate lambda with the half life:

lambda = ln2/T

You can derive this equation from the first equation (not discussed here). I usually advise students to use the first equation, because it appears that most students find working with ln and e more difficult than using the common log.