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+// Scilab Code Ex9.4: Uncertainty principle for position and momentum: Page-203 (2010)
+h = 6.626e-034;    // Planck's constant, Js
+m = 9.1e-031;    // Mass of the electron, kg
+v = 1.1e+006;    // Speed of the electron, m/s
+p = m*v;    // Momentum of the electron, kg-m/s
+dp = 0.1/100*p;    // Uncertainty in momentum, kg-m/s
+h_bar = h/(2*%pi);    // Reduced Planck's constant, Js
+// From Heisenberg uncertainty principle,
+// dx*dp = h_bar/2, solving for dx
+dx = h_bar/(2*dp);    // Uncertainty in position, m
+printf("\nThe uncertainty in position of electron = %4.2e m", dx);
+
+// Result
+// The uncertainty in position of electron = 5.27e-008 m 
+\ No newline at end of file