initial commit / add all books

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+//Variable declaration:
+//For the problem at hand, take as a basis 1 kilogram of water and assume the potential energy to be zero at ground level conditions.
+z1 = 0                      //Intial height from ground level (m)
+z2 = 10                     //Final height from ground level (m)
+PE1 = 0                     //Initial potential energy at z1 (J)
+m = 1                       //Mass of water (kg)
+g = 9.8                     //Gravitational acceleration (m/s^2)
+gc = 1                      //Conversion factor
+ 
+//Calculations:
+PE2 = m*(g/gc)*z2           //Final potential energy at z2 (J)
+ 
+//Result:
+disp("The potential energy of water is :")
+disp(PE2)
+disp("J ")