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+clear;

+clc;

+

+//Example 1.1(Heating of a copper ball)

+

+//(a)

+//density of the copper ball

+rho= 8950;//[kg/m^3]

+//Diameter of the copper ball

+D=0.1;//[m]

+//mass of the ball

+m=rho*(%pi/6)*(D^3);//[kg]

+//Specific Heat of copper

+Cp=0.395;//[kJ/Kg/m^3]

+//Initial Temperature

+T1=100;//[degree C]

+//Final Temperature

+T2=150;//[degree C]

+// The amount of heat transferred to the copper ball is simply the change in it's internal energy and is given by

+// Energy transfer to the system=Energy increase of the system

+Q=(m*Cp*(T2-T1));

+disp("kJ",Q,"Heat needs to be transferred to the copper ball to heat it from 100 to 150 degree celsius is ")

+//b

+//Time interval for which the ball is heated

+dT=1800;//[seconds]

+Qavg=(Q/dT)*1000;//[W]

+disp("W",Qavg,"Average Heat Transfer by the iron ball is ")

+

+//(c)

+//Heat Flux

+qavg=(Qavg/(%pi*(D^2)));//[W/m^2]

+disp("W/m^2",qavg,"Average flux is")