initial commit / add all books

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diff --git a/3845/CH5/EX5.1/Ex5_1.sce b/3845/CH5/EX5.1/Ex5_1.sce
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+//Example 5.1

+f_k=45;//Friction (N)

+m=62;//Mass of skier (kg)

+g=9.80;//Acceleration due to gravity (m/s^2)

+theta=25;//Inclination of slope (deg)

+N=m*g*cosd(theta);//Normal force perpendicular to slope (N)

+mu_k=f_k/N;//Coefficient of kinetic friction

+printf('Coefficient of kinetic friction = %0.3f',mu_k)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH5/EX5.2/Ex5_2.sce b/3845/CH5/EX5.2/Ex5_2.sce
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+//Example 5.2

+m=85;//Mass of skydiver (kg)

+g=9.80;//Acceleration due to gravity (m/s^2)

+rho=1.21;//Density of air (kg/m^3)

+C=1;//Coefficient of drag

+A=2*0.35;//Projected area (m^2)

+v_t=sqrt(2*m*g/(rho*C*A));//Terminal velocity (m/s)

+printf('Terminal velocity = %0.1f m/s',v_t)

+//Answer varies due to round off error

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH5/EX5.3/Ex5_3.sce b/3845/CH5/EX5.3/Ex5_3.sce
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+//Example 5.3

+F=3.0*10^6;//Maximum tension (N)

+L_0=3020;//Original length considered (m)

+Y=210*10^9;//Young's modulus (N/m^2)

+d=5.6*10^-2;//Diameter of cable (m)

+A=%pi*(d^2)/4;//Cross-sectional area of cable (m^2)

+delta_L=F*L_0/(Y*A);//Change in length (m)

+printf('Change in length = %0.2f m',delta_L)

+//An error of more than 2% with the answer in textbook for delta_L, but the answer can be rounded off to 18m 

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH5/EX5.4/Ex5_4.sce b/3845/CH5/EX5.4/Ex5_4.sce
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+//Example 5.4

+m=62;//Mass supported (kg)

+g=9.80;//Acceleration due to gravity (m/s^2)

+F=m*g;//Weight supported (N)

+L_0=0.400;//Original length (m)

+Y=9*10^9;//Young's modulus (N/m^2)

+r=2*10^-2;//Bone radius (m)

+A=%pi*(r^2);//Cross-sectional area of bone (m^2)

+delta_L=F*L_0/(Y*A);//Change in length (m)

+printf('Change in length = %0.0e m',delta_L)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH5/EX5.5/Ex5_5.sce b/3845/CH5/EX5.5/Ex5_5.sce
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+//Example 5.5

+S=80*10^9;//Shear modulus (N/m^2), See Table 5.3

+r=0.750*10^-3;//Radius of nail (m)

+A=%pi*r^2;//Cross-sectional area of nail (m^2)

+delta_x=1.8*10^-6;//Amount of flex (m)

+L_0=5*10^-3;//Original length (m)

+F=S*A*delta_x/L_0;//Weigth of the picture (N)

+m=F/g;//Picture's mass (kg)

+printf('Mass of the picture = %0.1f kg',m)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest

diff --git a/3845/CH5/EX5.6/Ex5_6.sce b/3845/CH5/EX5.6/Ex5_6.sce
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+//Example 5.6

+F_by_A=5.00*10^7;//Force per unit area at 5km depth (N/m^2)

+B=2.2*10^9;//Bulk modulus (N/m^2), See Table 5.3

+v=(F_by_A)/B;//Fractional decrease in volume

+printf('Fractional decrease in volume (in percentage) = %0.1f%%',v*100)

+//Openstax - College Physics

+//Download for free at http://cnx.org/content/col11406/latest