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+
+
+//exapple 9.4 
+clc; funcprot(0);
+// Initialization of Variable
+rhoa=1.218;//density of air
+mu=1.73/100000;
+pi=3.1428;
+g=9.81;
+rhop=2280;//density of polythene
+d=0.0034;//diameter
+a=4*d^3*(rhop-rhoa)*rhoa*g/3/mu^2;//a=Cd*Re^2
+//using graph of Cd*Re^2 vs Re
+Re=2200;
+v=Re*mu/d/rhog;
+disp(v , "The terminal vrlocity in (m/s)");