Why are de-Broglie waves with a moving football not visible?

Why are de-Brogile waves with a moving football not visible?

What is the de Broglie wavelength

Is it possible to observe de -Broglie wave associated with a material particle of 10^(-4) g moving with the velocity of light?Planck's constant is 6.6 xx 10^(-27) erg s.

Draw a graph showing variation of de-Broglie wavelength with the momentum of an electron?

The de-Broglie wavelengths,associated with a proton and a neutron,are found to be equal.Which of the two has a higher value for kinetic energy?