initial commit / add all books

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diff --git a/3717/CH20/EX20.1/Ex20_1.sce b/3717/CH20/EX20.1/Ex20_1.sce
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+// Ex20_1 Page:390 (2014)

+clc;clear;

+e = 1.6e-019;    // Energy equivalent of 1 eV, J/eV

+m = 1.67e-027;    // Mass of a nucleon, kg

+h = 6.626e-034;    // Planck's constant, Js

+E = 30;    // Energy of alpha particle, MeV

+r = 1.2e-015;    // Nuclear constant, m

+lambda_p = h/sqrt(2*m*E*1e+006*e);    // de-Broglie wavelength of the proton, m

+lambda_a = h/sqrt(2*4*m*E*1e+006*e);    // de-Broglie wavelength of the alpha particle, m

+d = 2*r;    // size of the nucleon, m

+printf("\nThe wavelength of the proton = %3.1e m", lambda_p);

+printf("\nThe wavelength of the alpha particle = %3.1e m", lambda_a);

+if ((lambda_p - d) < (lambda_a - d)) then

+    printf("\nThe proton is better for studying the nuclear details.")

+else

+    printf("\nThe alpha particle is better for studying the nuclear details.")

+end

+

+// Result

+// The wavelength of the proton = 5.2e-015 m

+// The wavelength of the alpha particle = 2.6e-015 m

+// The alpha particle is better for studying the nuclear details. 
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