initial commit / add all books

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+clc;

+//Example 19.5

+//page no 254

+printf("Example 19.5 page no 254\n\n");

+//a venturi meter has gasoline flowing through it.

+h=0.035//height of venturi meter

+D1=0.06//upsteeam diameter,m

+D2=0.02//throat diameter,m

+rho_m=13600//density of mercury

+rho=680//density of gasoline

+g=9.807

+v2=sqrt((2*g*h*(rho_m-rho)/rho)/1-D2^4/D1^4)//velocity of gasoline at the the throat

+printf("\n velocity at throat v2=%f m/s",v2);

+q=(%pi/4)*D2^2*v2//flow rate

+printf("\n flow rate q =%f m^3/s",q);

+P1=101325//upstream pressure,Pa

+P2=P1-g*h*(rho_m-rho)//pressure at throat P2

+printf("\n pressure P2=%f Pa",P2);

+P_d=P1-P2//pressure difference

+P_l=.1*P_d//pressure loss is 10 %

+printf("\n pressure loss P_l=%f Pa",P_l);

+W_l=q*P_l//power loss

+printf("\n power loss W_l=%f W",W_l);