initial commit / add all books

1 files changed, 17 insertions, 0 deletions

diff --git a/446/CH12/EX12.5/12_5.sce b/446/CH12/EX12.5/12_5.sce
new file mode 100755
index 000000000..131ab49c5
--- /dev/null
+++ b/446/CH12/EX12.5/12_5.sce
@@ -0,0 +1,17 @@
+clear

+clc

+disp('Exa -12.5(a)');

+t12=2.7*24*3600;              //converting days into seconds

+w=0.693/t12;                  //lambeda

+printf('The decay constant is %e\n /sec',w); 

+disp('Exa -12.5(b)');

+printf('The decay constant is equal to probability of decay in one second hence %e \n',w);

+disp('Exa -12.5(c)');

+m=10^-6;Na=6.023*10^23; M=198;     //given values and constants

+N=m*Na/M;                        //number of atoms in the sample 

+Ao=w*N;             //activity

+printf('The activity was found out to be %e Ci',Ao);        

+disp('Exa -12.5(d)');

+t=7*24*3600;         //given time

+A=Ao*%e^-(w*t);        //activity

+printf('The activity after one week was found out to be %.2e decays/sec',A);
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