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//Chapter-3,Example 2,Page 56
clc;
close;
m_alpha=6.646*10^-24 //mass of one alpha particle
n= 2300 // number of alpha particles
M=1*10^-6 //mass of plutonium
//as -(dM/dt)= lamda*M
//also (dM/dt)= n*m_alpha
lamda=n*m_alpha/M
t_half= 0.693/lamda //half life of Plutonium
printf('the half life of Plutonium is %.f years', t_half)
//mistake in text book
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