initial commit / add all books

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diff --git a/1309/CH2/EX2.6/Result2_6.pdf b/1309/CH2/EX2.6/Result2_6.pdf
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diff --git a/1309/CH2/EX2.6/ch2_6.sce b/1309/CH2/EX2.6/ch2_6.sce
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+clc;

+clear;

+printf("\t\t\tChapter2_example6\n\n\n");

+// Determination of the overall heat transfer coefficient

+k12=24.8; // thermal conductivity of 1C steel in BTU/(hr.ft.degree Rankine)from appendix table B2 

+k23=.023; // // thermal conductivity of glass wool insulation in BTU/(hr.ft.degree Rankine)from appendix table B3 

+// Specifications of 6 nominal, schedule 40 pipe (no schedule was specified, so the standard is assumed) from appendix table F1 are as follows

+D2=6.625/12; // outer diameter in ft

+D1=0.5054; // inner diameter in ft

+printf("\nOuter diameter is %.3f ft",D2);

+printf("\nInner diameter is %.4f ft",D1);

+t=2/12; // wall thickness of insulation in ft

+D3=D2+t;

+printf("\nDiameter including thickness is %.5f ft",D3);

+hc1=12; // convection coefficient between the air and the pipe wall in BTU/(hr. sq.ft.degree Rankine).

+hc2=1.5; // convection coefficient between the glass wool and the ambient air in  BTU/(hr. sq.ft.degree Rankine).

+U=1/((1/hc1)+(D1*log(D2/D1)/k12)+(D1*log(D3/D2)/k23)+(D1/(hc2*D3)));

+printf("\nOverall heat transfer coefficient is %.3f  BTU/(hr. sq.ft.degree Fahrenheit)",U);