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A proton and electron have kinetic energ...

A proton and electron have kinetic energy equal to `10^5 eV and 10^4 eV` respectively. Which of them moves faster ? Also calculate the ratio of their speeds. Given, mass of electron `=9.11xx10^(-31) kg` , mass of proton `=1.67xx10^(-27) kg and 1eV =1.6xx10^(-19)` Joule.

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The correct Answer is:
electron moves faster ;1:13.57
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For what kinetic energy of neutron will the associated de Broglie wavelength be 1.40 xx 10^(-10)m ? The mass of neutron is 1.675 xx 10^(-27) kg and h = 6.63 xx 10^(-34) J.s

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