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    Need help understanding Half life, decay constant & activity equations

    No.. I've not done calculus. so how do i solve for an equation involving \frac{dN}{dt} = -\lambda N? What context do i use this equation?
  2. I

    Need help understanding Half life, decay constant & activity equations

    Hi guys i'm having much difficulties in understanding the relations between half life, decay constant and activity. I'll explain what i known here. T^{\frac{1}{2}} is the half life which is the time to reduce the nuclides by half. \lambda is the decay constant which can be solved...
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    Help:Calculation of decay/sec using t1/2 & No

    Ok, so i use A = \lambda N instead of the one I've provided? Is there any difference between the two formula? So i convert years to seconds? And let grams remain as grams?
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    Help:Calculation of decay/sec using t1/2 & No

    Homework Statement The unstable isotope 40K is used to know the age of old rocks formed from molten lava. The half-life of 40K is 1.28 x 10^9 years, and it decays to 40Ar, which is a gas. In the molten rock, all gas escapes, so there is no Ar. However, when the rock is solidified, the gas 40Ar...
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