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Chapter 28: Special Relativity

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College Physics (Urone)
Pages: 1001 - 1032

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36 Questions for Chapter 28: Special Relativity

  1. Explain the meaning of the terms “red shift” and “blue shift” as they relate to the relativistic Doppler effect.

    Found on Page 1028
  2. What happens to the relativistic Doppler effect when relative velocity is zero? Is this the expected result?

    Found on Page 1028
  3. Is the relativistic Doppler effect consistent with the classical Doppler effect in the respect that\({{\rm{\lambda }}_{{\rm{obs}}}}\)is larger for motion away?

    Found on Page 1028
  4. All galaxies farther away than about\({\rm{50 \times 1}}{{\rm{0}}^{\rm{6}}}{\rm{ ly}}\)exhibit a red shift in their emitted light that is proportional to distance, with those farther and farther away having progressively greater red shifts. What does this imply, assuming that the only source of red shift is relative motion? (Hint: At these large distances, it is space itself that is expanding, but the effect on light is the same.)

    Found on Page 1028
  5. How does modern relativity modify the law of conservation of momentum?

    Found on Page 1028
  6. What happens to the mass of water in a pot when it cools, assuming no molecules escape or are added? Is this observable in practice? Explain.

    Found on Page 1028
  7. Consider a thought experiment. You place an expanded balloon of air on weighing scales outside in the early morning. The balloon stays on the scales and you are able to measure changes in its mass. Does the mass of the balloon change as the day progresses? Discuss the difficulties in carrying out this experiment.

    Found on Page 1028
  8. The mass of the fuel in a nuclear reactor decreases by an observable amount as it puts out energy. Is the same true for the coal and oxygen combined in a conventional power plant? If so, is this observable in practice for the coal and oxygen? Explain.

    Found on Page 1028
  9. What is γ? (a) if v=\({\bf{0}}.{\bf{250c}}\)? (b) If v=\({\bf{0}}.{\bf{500c}}\)

    Found on Page 1029
  10. We know that the velocity of an object with mass has an upper limit of c. Is there an upper limit on its momentum? Its energy? Explain.

    Found on Page 1028

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