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en.wikipedia.org/wiki/Half-life

... of the following three equivalent formulas: ... is the half-life of the decaying quantity, ...

www.coolmath.com/algebra/17-exponentials-logarithms/13-radioactive-decay-decibel-levels-01

... 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.

www.calculator.net/half-life-calculator.html

Free online tool to calculate any one of the values from the other three in a half- life formula as well as to convert between half life, mean lifetime, and decay ...

www.softschools.com/formulas/chemistry/radioactive_halflife_formula/113

A radioactive half-life refers to the amount of time it takes for half of the original isotope to decay. For example, if the half-life of a 50.0 gram sample is 3 years, ...

hyperphysics.phy-astr.gsu.edu/hbase/Nuclear/halfli2.html

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: ...

www.ask.com/youtube?q=Half+Life+Formula&v=N6OWOJrvkTA
Aug 1, 2015 ... derive half life formula - Duration: 3:41. stewartphysics 9,588 views · 3:41. Half- life of a first-order reaction | Knetics | Chemistry | Khan Academy ...
www.ask.com/youtube?q=Half+Life+Formula&v=sc7xvgJ7Sn8
Jan 3, 2013 ... Half-Life Calculations: Radioactive Decay. chemistNATE .... Taught me half life calcs before my mid year exam, legend!! .... An Easy Equation to Calculate the Half-Life of an Isotope : Chemistry & Physics - Duration: 3:13.

www.wikihow.com/Calculate-Half-Life

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.

www.researchgate.net/file.PostFileLoader.html?id=5669f2097c192062ff8b460b&assetKey=AS%3A305229608751107%401449783817551

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.