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+//chapter 5
+//example 5.18
+//Calculate uncertainty in the position of electron
+//page 109-110
+clear;
+clc;
+//given
+v=6.6E4; // m/s (speed of electron)
+poc=0.01; // percentage of uncertainty
+h=6.63E-34; // in J-s (Planck's constant)
+m=9E-31; // in Kg (mass of electron)
+pi=3.14; // value of pi used in the solution
+//calculate
+p=m*v; // calculation of momentum
+printf('\nThe momentum of electron is \t\t\tp=%1.2E Kg-m/s',p);
+dp=(poc/100)*p; // calculation of uncertainty in the momentum
+printf('\nThe uncertainty in the momentum of electron is\tdp=%1.2E Kg-m/s',dp);
+// Since dx*dp=h/4*pi  (uncertainty relation)
+dx=h/(4*pi*dp); // calculation of uncertainty in the position
+printf('\nThe uncertainty in the position of electron is\tdx=%1.2E Kg-m/s',dx);
+// Note; solution is incomplete in the book