initial commit / add all books

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diff --git a/623/CH1/EX1.1.28/U1_C1_28.sce b/623/CH1/EX1.1.28/U1_C1_28.sce
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+//variable initialization

+c=3*10^8;                                                          //speed of light(meter/second)

+v1=0.6*c;                                                         //initial velocity of particle (meter/second)

+v2=0.8*c;                                                         //final velocity of particle (meter/second)

+

+//Calculation of work required to increase the velocity from v1 to v2:

+

+//Classically

+W_Classic=0.5*((v2/c)^2-(v1/c)^2);                                //ratio of work and m0*c^2 (mo is the rest mass of particle and c is the speed of light)

+

+//Relativistically

+W_Relative=(1/(1-(v2/c)^2)^(1/2))-(1/(1-(v1/c)^2)^(1/2));         //ratio of work and m0*c^2 (mo is the rest mass of particle and c is the speed of light)

+

+printf("\nWork required:\n\t Classically: Work = %.2f*m0*c^2\n\t Relativistically: Work = %.3f*m0*c^2\nWhere m0:rest mass of particle & c:speed of light",W_Classic,W_Relative);