The de-Broglie wavelength associated with a ball of mass 1kg having kinetic energy 0.5 J is

Q. The de Broglie wavelength associated with a ball of mass $1$kg having kinetic energy $0.5J$ is:

Q. The wavelength of de broglie waves associated with a beam of protons of kinetic energy $5\times {10}^2$eV.
(Mass of each photon$=1.67\times {10}^{-27}$Kg, $h=6.62\times {10}^{-34}$Js.)

Q. What is the wavelength associated with a tennis ball of mass ${10}^{3}g$ an travelling at a velocity of 6.626 $m{s}^{-1}$ ?
$[h=6.6\times {10}^{-34}Js]$

Q. The kinetic energy of an electron is $5\text{eV}$. Calculate the de-Broglie wavelength associated with it. $(h=6.6\times {10}^{-34}\text{Js},m_e=9.1\times {10}^{-31}\text{kg})$