College Physics
2nd Edition
ISBN: 9780134601823
Author: ETKINA, Eugenia, Planinšič, G. (gorazd), Van Heuvelen, Alan
Publisher: Pearson,
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Chapter 30, Problem 4RQ
To determine
The explanation that predicted the existence of cosmic microwave background from the big bang model.
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Referring to the Feynman diagram, name:a. particle A
b. the exchange particle involved
c. the force involved in the interaction
d. Explain how you know that there has not been a change of quark colour but there has been a change of flavour.
1. If a proton is moving at very high speed, so that its kinetic energy is much greater
than its rest energy (mc²), can it then decay via p →n + n+?
2. What would an “antiatom," made up of the antiparticles to the constituents of normal
atoms, consist of? What might happen if antimatter, made of such antiatoms, came
in contact with our normal world of matter?
4. A neutral pion moving with velocity v decays into two photons; one photon of energy E1
travelling in the original direction of the parent pion and the other photon of energy E2 in
the exactly opposite direction. If E1 = 2E2, find v.
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Chapter 30 Solutions
College Physics
Ch. 30 - Prob. 1RQCh. 30 - Prob. 2RQCh. 30 - Review Question 30.3 Using what you have learned...Ch. 30 - Prob. 4RQCh. 30 - Prob. 5RQCh. 30 - Prob. 1MCQCh. 30 - Prob. 2MCQCh. 30 - Prob. 3MCQCh. 30 - Prob. 4MCQCh. 30 - Prob. 5CQ
Ch. 30 - Prob. 6CQCh. 30 - Prob. 7CQCh. 30 - Prob. 8CQCh. 30 - Prob. 9CQCh. 30 - Prob. 10CQCh. 30 - Prob. 11CQCh. 30 - 12. What are the components of the Standard...Ch. 30 - Prob. 13CQCh. 30 - Prob. 14CQCh. 30 - Prob. 1PCh. 30 - Prob. 2PCh. 30 - Prob. 3PCh. 30 - Prob. 4PCh. 30 - Prob. 5PCh. 30 - 6. Use Newtonian circular motion concepts to show...Ch. 30 - Prob. 7PCh. 30 - A particle enters a cloud chamber from above...Ch. 30 - Prob. 9PCh. 30 - Prob. 10PCh. 30 - Prob. 11PCh. 30 - Prob. 12PCh. 30 - Prob. 13PCh. 30 - 14. * Make an analogy between the interactions of...Ch. 30 - Why are neutrinos difficult to detect?Ch. 30 - Prob. 16PCh. 30 - Prob. 17PCh. 30 - Prob. 18PCh. 30 - Prob. 19PCh. 30 - Prob. 20PCh. 30 - Prob. 21PCh. 30 - Prob. 22PCh. 30 - Prob. 23PCh. 30 - Prob. 24PCh. 30 - Prob. 25PCh. 30 - Prob. 26PCh. 30 - * What is inflation, and what eventually happened...Ch. 30 - Prob. 29PCh. 30 - Prob. 30PCh. 30 - Prob. 31PCh. 30 - * Our bodies contain significant amounts of...Ch. 30 - 33. * What is the evidence that a large proportion...Ch. 30 - Prob. 34PCh. 30 - 35. * What is the experimental evidence for dark...Ch. 30 - Prob. 36PCh. 30 - Prob. 37PCh. 30 - Prob. 38PCh. 30 - Prob. 39PCh. 30 - * An electron and a positron are traveling...Ch. 30 - Prob. 41GPCh. 30 - Prob. 42RPPCh. 30 - Prob. 43RPPCh. 30 - Prob. 44RPP
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- Describe two pieces of evidence that support the Big Bang model.arrow_forwardWhat is meant by cosmological expansion? Express your answer in terms of a Hubble graph and the red shift of distant starlight.arrow_forwardThe peak intensity of the CMBR occurs at a wavelength of 1.1 mm. (a) What is the energy in eV at a 1.1mm photon? (b) There are approximately 109 photons for each massive particle in deep space. Calculate the energy of 109 such photons. (c) If the average massive particle in space has a mass half that of a proton, what energy would be created by convening its mass to enemy? (d) Does this imply that space is “matter dominated”? Explain briefly.arrow_forward
- (a) A particle and its antiparticle are at rest relative to an observer and annihilate (completely destroying both masses), creating two (rays of equal energy. What is the characteristic (ray energy you would look for if searching for evidence of protonantiproton annihilation? (The fact that such radiation is rarely observed is evidence that here is very little antimatter in the universe.) (b) How does this compare with the 0.511MeV energy associated with electronpositron annihilation?arrow_forwardWhat is the motivation behind grand unification theories?arrow_forwardWhat are six particle conservation laws? Briefly describe them.arrow_forward
- (a) A panicle and its antiparticle are at rest relative to an observer and annihilate (completely destroying both masses), creating two y rays of equal energy. What is the characteristic y -ray energy you would look for if searching for evidence of proton-antiproton annihilation? (The fact that such radiation is rarely observed is evidence that there is very little antimatter in the universe.) (b) How does this compare with the 0.511-MeV energy associated with electron-positron annihilation?arrow_forward(a) What Hubble constant corresponds to an approximate age of the universe of 1010 y? To get an approximate value, assume the expansion rate is constant and calculate the speed at which two galaxies must move apart to be separated by 1 Mly (present average galactic separation) in a time of 1010 y. (b) Similarly, what Hubble constant corresponds to a universe approximately 21010years old?arrow_forwardDraw a Feynman diagram to represents annihilation of an electron and position into a photon.arrow_forward
- What is meant by a “cosmological model of the early universe?” Briefly describe this model in terms of the four fundamental forces.arrow_forwardWhat is the Standard Model? Express your answer in terms of the four fundamental forces and exchange particles.arrow_forwardIntegrated Concepts In supernovas, neutrinos are produced in huge amounts. They were detected from the 1987A supernova in the Magellanic Cloud, which is about 120,000 light years away from the Earth (relatively close to our Milky Way galaxy). If neutrinos have a mass, they cannot travel at the speed of light, but it their mass is small, they can get close. (a) Suppose a neutrino with a mass has a kinetic energy of 700 keV. Find the relativistic quantity for it (b) If the neutrino leaves the 1987A supernova at the same time as a photon and both travel to Earth, how much sooner does the photon arrive? This is not a large time difference, given that it is impossible to know which neutrino left with which photon and the peer ef?ciency of the neutrino detectors. Thus, the fact that neutrinos were observed within hours of the brightening of the supernova only places an upper limit on the neutrino’s mass. (Hint: You may need to use a series expansion to find if for the neutrino, since its (is so large.)arrow_forward
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