clc
//given that
M = 6e24 // Mass of earth in Kg
v = 3e4 // Orbital velocity of earth in m/s
h = 6.625e-34 // Plank constant

printf("Example 1.1")
lambda = h/(M*v) // calculation of de Broglie wavelength

printf("\n de Broglie wavelength of earth is %e m.\n\n\n",lambda)