Atomic particles are often characterized by their kinetic energy in MeV. Alpha d

Question

Atomic particles are often characterized by their kinetic energy in MeV. Alpha decay, or -decay, is a type of radioactive decay inwhich an atomic nucleus emits an particle and thereby transforms or decays in to an atom with a mass number that is reduced by four and an atomic number that is reduced by two. An particle is identical to the nucleus of a helium-4 atom, which consists of two protons and two neutrons and has a mass of 6.644x10-27kg.( for example uranium-238 decays to form thorium-234) What is the speed of the alpha partic with a 5.0MeV kinetic energy?

Please show work thanks

Explanation / Answer

Apply, Kinetic energy, KE = (1/2)*m*v^2

==> v = sqrt(2*KE/m)

= sqrt(2*5*10^6*1.6*10^-19/(6.644*10^-27))

= 1.55*10^7 m/s <<<<<<<<--------Answer

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