clc;
h=6.63*10^-34;      //Plancks constant in J.sec
m=9.1*10^-31;       //mass in kg
r1=5.3*10^-11;      //radius in m
v=h/(2*%pi*m*r1);   //calculating velocity in m/sec
disp(v,"Velocity in m/sec = ");  //displaying result