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+//ques-25.24
+//Calculating mean free path for hydrogen gas
+clc
+visc=8.41*10^-6;//coefficient of viscosity (in Pas)
+den=9*10^-2;//density (in kg/kL)
+Cavg=1.69*10^3;//average velocity (in m/s)
+mfp=(2*visc)/(den*Cavg);
+printf("The mean free path required is %.2f*10^-7 m.",mfp*10^7);