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+clc;

+//Example 24.7

+//page no 358

+printf("Example 24.7 page no 358\n\n");

+//a cylindrical cup open to the atmosphere is filled with liquid to a height of 7 cm

+//rotated around it's axis

+//calculation of an angular velocity that will cause the liquid to start spilling 

+h=0.03//height,m

+R=0.03//radius,cm

+//applying eq. 24.22

+g=9.807//grav. acc

+omega=sqrt(2*h*g/(R^2))

+omega=36.2//printing mistake in book

+//calculation of pressure at point A and B that is P_a and P_b

+z=.1//liquid height above point A and B,m

+rho=1010//density of liquid,kg/m^3

+P_a = rho*g*z

+P_b=P_a//from symmetry P_a = P_b

+printf("\n pressure P_a=%f Pa_gauge\n pressure P_b=%f Pa_gauge",P_a,P_b);

+z_c=0.04//liquid height above point c,m

+P_c=rho*g*z_c//pressure at point c

+printf("\n pressure P_c=%f Pa_gauge",P_c);

+//to obtain the film thicknes,we have to find the original height 

+z_l=0.07//liquid height ,m

+h_o=z_l-z_c//original height

+r = 100*sqrt(2*h_o*g/(omega^2))//100 for centimeter

+printf("\n r=%fcm ",r);

+R=3

+t_f=R-r//thikness of film

+printf("\n thickness film t_f=%f m",t_f);//printing mistake in book

+

+

+

+