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+////
+//Variable Declaration
+D = 1.0e-5 //Diffusion coefficient, m2/s
+t1 = 1000 //Time, s
+t10 = 10000 //Time, s
+
+//Calculations
+xrms1 = sqrt(2*D*t1)
+xrms10 = sqrt(2*D*t10)
+
+//Results
+printf("\n rms displacement at %4d and %4d is %4.3f and %4.3f m respectively",t1,t10,xrms1,xrms10)
+