How do you calculate half life?

Answer

To calculate half of a life, you will first need to know how long the whole life is. If a person lived to be 80, then half of that life would be 40. You will just divide the age at which the person or animal died, by two.
Q&A Related to "How do you calculate half life?"
1. Divide the amount of the substance at one point in time by the amount remaining after a period of time. The formula for calculating half life is as follows: t. 1/2. = t * ln(2)
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1. Suppose you know the proportions of a substance at two points in time. Denote the difference between these two points in time with the letter "T. Denote the ratio of the smaller
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Check the time between your first decay rate and when the decay rate reaches half this number.
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Relative decay rate k = - ln2/5272. The amount of Cobalt-60 left after t years given by A(t) = A0e^kt) This implies A(1600) = 100e^ln2*1600/5272) = 81.0290 g.
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1 Additional Answer
Ask.com Answer for: how to calculate half life
How to Calculate Half-Lifes
A half-life is the time that a substance takes for half of it to disappear. For example, the half-life of uranium-235 is 700 million years. It takes another 700 million years for half of the remainder to decay. Therefore after 1.4 billion years, 25% of... More »
Difficulty: Moderately Easy
Source: www.ehow.com
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