... of the following three equivalent formulas: ... is the half-life of the decaying
... introduces radioactive decay and decibel levels and explains how to use their
formulas. ... "Half-life means that, if you have 100 pounds of Plutonium-239.
The radioactive half-life for a given radioisotope is a measure of the tendency of
the nucleus to "decay" or ... so the standard form of the decay equation is: ...
Equations for half lives; Determining a half life; Converting a half life to a rate ...
Substitute this information into the equation for the half life of a reaction with this ...
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Jan 3, 2013 ... MATH VIDEO. How to calculate how much of a substance remains after a certain
amount of time. ALSO: How to figure out how LONG it takes to ...
Doubling-Time & Half-Life. 1 Exponential Growth & Decay. Recall the formula we
developed for compound interest,. A = P. (. 1 + r n. )nt. , where.
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Mar 26, 2009 ... Exponential Decay / Finding Half Life - In this video, I find the half life of a ... What
is the value of k in the decay equation for this isotope? b.
Page 1. HALF-LIFE EQUATIONS. The basic equation ; the starting point ; : x. 2. 1
y = written for time: 1/2 t. 2. 1 y = where y = fraction of original material and. 1/2.
You can calculate the half-life of any substance, given the rate of decay, which is
the initial quantity of ... Now, we have the formula for the half-life of a substance.
Half-Life Calculator, exponential decay, Radioactivity. ... The above formulas are
used in calculations involving the exponential decay of radioactive materials.