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A radioactive sample has a certain number N of unstable nuclei that are emitting 4.5 MeV...

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Physics

A radioactive sample has a certain number N of unstable nucleithat are emitting 4.5 MeV gamma rays with a half-life of 1.5 hours.If the rate of radioactive heating of the sample due to thesedecays is 13 watts, how many unstable nuclei are initially in thesample?

AND

A muon at rest decays into an electron, an anti-electronneutrino, and a muon neutrino. After the decay, the electron has atotal energy of 52.85 MeV and the anti-electron neutrino has anenergy of 20 MeV. What is the energy of the muon neutrino (in MeV,closest answer)?

AND

*Suppose that a particle of mass m is confined to a region ofwidth a. Its energy in the ground state must be of order (theparticle is non-relativistic)–

(1) \bar{h} ^2/(ma^2 ). (2) 2 eV. (3) \bar{h} /a. (4) \bar{h} ^2*am. (5) \bar{h} ^2/(ma).

*(don't truly comprehend this last one specially-thanks.)

Answer & Explanation Solved by verified expert
4.4 Ratings (836 Votes)
Above is the solution forfirst questionI have used the basic formula of radioactivity and since    See Answer
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