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+clear;
+clc;
+printf("\t\t\tProblem Number 3.5\n\n\n");
+// Chapter 3 : The First Law Of Thermodynamics
+// Problem 3.5 (page no. 96) 
+// Solution
+
+P1=100 //Unit:psia //Pressure at the entrance to a steady-flow device
+Rho1=62.4 //Unit:lbm/ft^3 //the density of the fluid
+A1V1=10000 //Unit:ft^3/min //Entering fluid
+A2=2 //Unit:ft^2 //Exit area
+m=Rho1*A1V1; //Unit:lbm/min //mass rate of flow per unit time
+printf("Mass flow rate is %f LBm/min\n",m);
+
+Rho2=Rho1; //Unit:lbm/ft^3 //the density of the fluid
+//m=Rho2*A2*V2
+//So,
+V2=m/(Rho2*A2); //velocity at exit //Unit:ft/min
+printf("The exit velocity is %f ft/min",V2);