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clear
//
//
//
//Variable declaration
E=10**4*1.6*10**-19 //kinetic energy(J)
m=1.675*10**-27 //mass(kg)
h=6.625*10**-34 //planck's constant
//Calculation
v=sqrt(2*E/m) //velocity(m/s)
lamda=h/(m*v) //de broglie wavelength(m)
//Result
printf("\n de broglie wavelength is %0.5f angstrom",lamda*10**10)
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