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+// Calculating the rate of change of temperature at t=0
+clc;
+disp('Example 4.19, Page No. = 4.27')
+// Given Data
+I = 2.5;// Current (in Amperes)
+V = 230;// Voltage (in volts)
+G = 60;// Weight of copper (in kg)
+h = 390;// Specific heat of copper (in J per kg per degree celsius)
+// Calculation of the rate of change of temperature at t=0
+Q = I*V;// Loss (in Watts)
+T_rate = Q/(G*h);// Rate of change of temperature at t=0 (in degree celsius per second)
+disp(T_rate,'Rate of change of temperature at t=0 (degree celsius per second)=');
+//in book answer is 0.0246 (in degree celsius per second). The answers vary due to round off error
+