initial commit / add all books

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diff --git a/2063/CH9/EX9.4/9_4.sce b/2063/CH9/EX9.4/9_4.sce
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+clc

+clear

+//Input data

+D=0.25;//Diameter of the cylinder of a single acting air compressor in m

+L=0.4;//Length of the stroke in m

+P1=1;//Initial Pressure of the compressor in bar

+T1=303;//Initial temperature of the compressor in K

+P2=6;//Pressure during running in bar

+N=250;//Operating speed of the compressor in rpm

+R=287;//Gas constant in J/kg K 

+

+//Calculations

+V1=(3.14*D^2*L)/4;//Volume of air before compression in m^3

+m=(P1*10^5*V1)/(R*T1);//Mass of air delivered by the compressor per stroke in kg/stroke

+Nw=N;//Since single acting cylinder number of working stroke is equal to Operating speed of the compressor in rpm

+ma=m*Nw;//Mass of air delivered per minute in kg/min

+

+//Output

+printf('Mass of air delivered per minute is %3.2f kg/min',ma)