initial commit / add all books

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+clc
+// Example 1.3.py
+// Calculate the isothermal compressibility for air at a pressure of 0.5 atm.
+
+// Variable declaration
+p = 0.5           // pressure (atm)
+p_si = 0.5*101325 // pressure (N/m^2)
+p_eng = 0.5*2116  // pressure (lb/ft^2)
+
+// Calculations 
+tau_atm = 1/p       // isothermal compressibility in atm^-1
+tau_si = 1/p_si     // isothermal compressibility in m^2/N
+tau_eng = 1/p_eng   // isothermal compressibility in ft^2/lb
+
+// Result 
+printf("\n Isothermal compressibility for air at %.1f atm is %.2f atm^-1 or %.2e m^2/N or %.2e ft^2/lb", p, tau_atm, tau_si, tau_eng)
+