Mastering Physics with Pearson eText -- Standalone Access Card -- for Essential University Physics (3rd Edition)
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Chapter 39, Problem 60P
To determine

What Hubble’s constant the cosmologist will measure.

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(a) Verify from its quark composition that the Δ+ particlecould be an excited state of the proton.(b) There is a spread of about 100 MeV in the decay energyof the Δ+ , interpreted as uncertainty due to its short lifetime.What is its approximate lifetime?(c) Does its decay proceed via the strong or weak force?
What is the rest energy (in joules) of a subatomic particle whose (rest) mass is 6.7×10−31 kg?  How many MeV’s of energy is this?
(a) Show that the conjectured decay of the proton, p → π0 + e+ , violates conservation of baryon number and conservation of lepton number.(b) What is the analogous decay process for the antiproton?
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