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-rwxr-xr-x1172/CH6/EX6.9/6_9.txt5
-rwxr-xr-x1172/CH6/EX6.9/Example6_9.sce11
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diff --git a/1172/CH6/EX6.9/6_9.txt b/1172/CH6/EX6.9/6_9.txt
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+
+ # Problem 9 #
+
+ Standard formula used
+ Lifetime of meson is 3.333333e-08 sec.
diff --git a/1172/CH6/EX6.9/Example6_9.sce b/1172/CH6/EX6.9/Example6_9.sce
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+
+clc
+//Given that
+c = 3e8 // speed of light in m/s
+v = 2.4e8 // speed of meson
+t_0 = 2e-8 // lifetime of meson in second
+// sample problem 9 page No. 224
+printf("\n \n\n # Problem 9 # \n")
+printf("\n Standard formula used ")
+t = t_0 / sqrt(1 - (v / c )^2 ) // calculation of Lifetime of meson
+printf ("\n Lifetime of meson is %e sec.", t )