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//variable initialization
RestEnergy=0.51 //rest energy of electron (Mev)
T=1 //potential difference i.e. kinetic energy (Mev)
c=3*10^8; //speed of light (meter/second)
//calculation of speed of electron
Beta=(1-(RestEnergy/(T+RestEnergy))^2)^(1/2); //calculation of Beta
v=Beta*c; //speed of electron (meter/second)
printf("\n\tThe speed of the electron = %.2e meter/second",v);
//Note: In the book answer of Beta is slightly wrong
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