A helium atom mass of helium atom 6646 x 10-27 kg


A helium atom (mass of helium atom = 6.646 x 10-27 kg), initially at rest, emits a photon of energy 40.8 eV.

(a) What is the speed of the Helium atom after releasing this photon?

(b) What is the ratio of the Helium atom's final kinetic energy to the emitted photon's energy?

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Physics: A helium atom mass of helium atom 6646 x 10-27 kg
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