initial commit / add all books

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+clear;
+clc;
+disp('Example 1.9');
+
+
+//  Given values
+m_dot = 20.4; //  mass flowrate of petrol, [kg/h]
+c = 43; //  calorific  value of petrol, [MJ/kg]
+n = .2; //  Thermal efficiency of engine
+
+//  solution
+m_dot = 20.4/3600; // [kg/s]
+c = 43*10^6; //  [J/kg]
+
+//  power output
+P_out = n*m_dot*c; //  [W]
+
+mprintf('\n The power output of the engine is  =  %f  kJ\n',P_out*10^-3);
+ 
+//  power rejected
+
+P_rej = m_dot*c*(1-n); //  [W]
+P_rej = P_rej*60*10^-6; //  [MJ/min]
+
+mprintf('\n The energy rejected by the engine is  =   %f  MJ/min \n',P_rej);
+
+//End