Using differential equations to determine the decay constant for carbon-14

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SUMMARY

The discussion focuses on using differential equations to calculate the decay constant for carbon-14, which has a half-life of 5730 years. The differential equation dQ/dt = -rQ is solved to yield the solution Q = ce^(-rt). The relationship between the half-life and the decay constant is established, confirming that Q(5730) = (1/2)Q(0) effectively determines the decay constant r.

PREREQUISITES
  • Understanding of differential equations, specifically first-order linear equations.
  • Knowledge of exponential decay functions.
  • Familiarity with the concept of half-life in radioactive decay.
  • Basic algebra skills for manipulating equations.
NEXT STEPS
  • Study the derivation of the decay constant from the half-life formula.
  • Explore applications of differential equations in other decay processes.
  • Learn about the implications of carbon dating in archaeology and geology.
  • Investigate numerical methods for solving differential equations.
USEFUL FOR

This discussion is beneficial for students studying physics or chemistry, particularly those focusing on nuclear chemistry, as well as educators and professionals involved in carbon dating techniques.

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Homework Statement


Q(t) is the amount of carbon 14 at time t. Given half life of 5730 years, and assuming that Q satisfies dQ/dt=-rQ; determine decay constant r


Homework Equations





The Attempt at a Solution


I solved the differential equation and got Q=ce^-rt. Now what? And hints/help?
 
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The half life is 5730 years, that means that Q(5730)=(1/2)Q(0)
 
thanks i figured it out
 

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