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+///Chapter No 7 Fluid Mechanics
+////Example 7.7 Page No:117
+///Find  Density of oil
+///Input data
+clc;
+clear;
+A=6*10^-2;           //Space between two square plates in mm
+dy=8*10^-3;          //Thickness of fluid in mm
+u1=0;                 //Lower pate is stationary
+u2=2.4;               //Upper plate in m/s
+F=5;                  //Speed of force in N
+s=1.6;                //Specific gravity of the liquid
+dow=1000;             //Density of water Kg/m**3
+
+
+//(1)Calculation
+du=u2-u1;             //change in velocity in m/s
+tau=F/((A)^2);     //shear stress N/m**2
+mu=tau/(du/dy);     //Newton's law of viscosity in Ns/m**2 or poise
+rho=s*dow;            //Density of oil in kg/m**3
+v=mu/rho;           ///kinematic viscosity is given by m**2/s or stoke
+
+
+///Output
+printf('change in velocity=%f m/s \n ',du);
+printf('shear stress=%f N/m^2 \n  ',tau);
+printf('Newtons law of viscosity=%f Ns/m^2 \n',mu);
+printf('Density of oil=%f kg/m^3 \n ',rho);
+printf('kinematic viscosity=%f m^2/s ',v);