what will be the wavelength of a ball of mass 0.1 kg moving with a velocity of `10 m s^(-1)` ?

Explanation

According to de Broglie equation, `lamda = (h)/(mv) = (6.626 xx 10^(-34) kg m^(2) s^(-1))/((0.1kg) (10 ms^(-1))) = 6.626 xx 10^(-34) m`