How does the de Broglie wavelength of a proton change if its velocity increased?

By what factor does the de-Broglie wavelength of a free electron changes if its kinetic energy is doubled ?

By what factor does the de-Broglie wavelength of a free electron changes if its kinetic energy is doubled ?

The ratio of de Broglie wavelength of a proton and a neutron moving with same velocity is nearly

The de Broglie wavelength of a moving electron is 1 Å . What is its velocity?

Calculate the de-Broglie wavelength of a proton having K.E. 50eV .