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+//=====================================================================================================
+//chapter 1 example 7
+
+clc;
+clear all;
+
+//variable declaration
+t1     =500;       //temperature in °C
+t2     =1250;       //temperature in °C
+r      = 0.12;      //dead space in pyrometer in per cent of span
+
+//calculations
+S     = t2-t1;               //span the algebric diffeerence between the upper and lower range values
+d     = (r/(100))*S;    //dead space in °C 
+
+//result
+mprintf(" a change of %3.2f °C must occur before it is detected",d);
+
+//=========================================================================================================