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Chapter 44: Q28P (page 1364)
What quark combination is needed to form (a) and (b)
(a) The quark combination of is.
(b) The quark combination of is .
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Certain theories predict that the proton is unstable, with a half-life of about 1032 years. Assuming that this is true, calculate the number ofproton decays you would expect to occur in one year in the water ofan Olympic-sized swimming pool holding 4.32 x 105L of water.
An electron and a positron, each with a kinetic energy of , annihilate, creating two photons that travel away in opposite directions. What is the frequency of each photon?
If Hubble’s law can be extrapolated to very large distances, at what distance would the apparent recessional speed become equal to the speed of light ?
The spin- baryon(see table in Problem 24) has a rest energy of (with an intrinsic uncertainty ignored here); the spin- baryonhas a rest energyof.If each of these particles has a kinetic energy of ,
(a) which is moving faster and
(b) by how much?
The quark makeups of the proton and neutron are and,respectively. What are the quark makeups of (a) the antiproton and (b) the antineutron?
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