Final Dotu

54 Questions

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Final Dotu

Questions and Answers
  • 1. 
    Which force decreases with incresing energy?
    • A. 

      Strong

    • B. 

      Weak

    • C. 

      Electromagnetic

    • D. 

      None of these

  • 2. 
    That of the Higgs is much smaller than the GUT and Planck scales is
    • A. 

      Due to vitual particles

    • B. 

      Called the Hierarchy problem

    • C. 

      Comepletely natural

    • D. 

      Only true for supersymmetric theories

  • 3. 
    If supersymmetry is a symmetry of nature, it must be broken
    • A. 

      True

    • B. 

      False

  • 4. 
    Supersymmetry may help resolve
    • A. 

      The hierarchy problem

    • B. 

      Grand unification of forces

    • C. 

      Dark matter

    • D. 

      All of these

  • 5. 
    String theory provides a unique, verifiable prediction for the structure of the Universe
    • A. 

      True

    • B. 

      False

  • 6. 
    When energy is extracted from the ergosphere of a rotating black hole, the rotation rate
    • A. 

      Doubles

    • B. 

      Decreases

    • C. 

      Increses

    • D. 

      Stays the same

  • 7. 
    A black hole pulls in everything nearby because it has infinite mass
    • A. 

      True

    • B. 

      False

  • 8. 
    Which is the more common type of object in the solar system
    • A. 

      Planet

    • B. 

      Moon

    • C. 

      Asteroid

    • D. 

      Comet

  • 9. 
    The earths moon had its origin in
    • A. 

      The capture of a rouge moon wandering interstellar space.

    • B. 

      A dwarf planet that formed in an orbit near earths

    • C. 

      Accretion of debris from a giant impact on earth

    • D. 

      None of the above

  • 10. 
    The asteroid belt is the result of
    • A. 

      The explosion of a large planet

    • B. 

      The interference of Jupiters gravity on the planet formation process.

    • C. 

      Collisions between mars and jupiter during their formation

    • D. 

      None of the above

  • 11. 
    Which is the best method for prevention of an asteroid impact
    • A. 

      Break apart with nuclear explosions

    • B. 

      Divert from collision course by nearby explosions

    • C. 

      Divert from collision course by pulling with rockets

    • D. 

      Wait for alien intervention

  • 12. 
    Comets are more dangerous that asteroids because they can come from any direction
    • A. 

      True

    • B. 

      False

  • 13. 
    An planet is easier to detect if
    • A. 

      It is small and far from its star

    • B. 

      It is small and close to its star

    • C. 

      It is large and far from its star

    • D. 

      It is large and close to its star

  • 14. 
    Exoplanets are observed by
    • A. 

      Infared radiation from the planet

    • B. 

      Variation in the stars motion

    • C. 

      Variation in the stars brighness

    • D. 

      All of the above

  • 15. 
    Name two of the four fundamental forces
  • 16. 
    Which of the following is not evidence for quantum mechanics
    • A. 

      Photoelectric effect

    • B. 

      Discrete atomic spectra

    • C. 

      Time dilation

    • D. 

      Double slit interference pattern

  • 17. 
    The position and momentum of an electron can be measured simultaneously
    • A. 

      True

    • B. 

      False

  • 18. 
    A photons energy is proportional to its
    • A. 

      Frequency

    • B. 

      Volume

    • C. 

      Mass

    • D. 

      None of the above

  • 19. 
    Quantam mechanics make precise predictions for particle trajectories
    • A. 

      True

    • B. 

      False

  • 20. 
    The chemistry of the elements has rich structure because
    • A. 

      Electrons are bosons and like to condense to the same state

    • B. 

      Electrons are fermions and cannot be placed in the same state

    • C. 

      Every element has the same number of electrons.

    • D. 

      None of the above

  • 21. 
    Time dilation in special relativity means that moving clocks appear to run faster
    • A. 

      True

    • B. 

      False

  • 22. 
    Which of the following is not a consequence of special relativity.
    • A. 

      Length contraction

    • B. 

      Time dilation

    • C. 

      Gravitational redshift

    • D. 

      Relativity of simultaneity

  • 23. 
    The global positioning system (GPS) must take into account
    • A. 

      Special relativity

    • B. 

      General relativity

    • C. 

      Both

    • D. 

      Neither

  • 24. 
    Which of the follwing is not a consequence of general relativity
    • A. 

      Frame dragging

    • B. 

      Gravitational waves

    • C. 

      Gravitational time dilation

    • D. 

      The standard model

  • 25. 
    Newtonian mechanics and newtonian gravity are consistent with relativity for
    • A. 

      Slow speeds and low densities.

    • B. 

      Fast speeds and low densities

    • C. 

      Slow speeds and high densities

    • D. 

      Fast speeds and high densities

  • 26. 
    Which of the following is not evidence for quantam mechanics?
    • A. 

      Photoelectric effect

    • B. 

      Discrete atomic spectra

    • C. 

      Time dilation

    • D. 

      Double-slit interference pattern

  • 27. 
    A photons energy is proportional to its
    • A. 

      Frequency

    • B. 

      Volume

    • C. 

      Mass

    • D. 

      None of the above

  • 28. 
    Quantam mechanics makes precise prediction for particle trajectories
    • A. 

      True

    • B. 

      False

  • 29. 
    The chemistry of the elements has rich structure because
    • A. 

      Electrons are bosons and like to condence to the same state

    • B. 

      Electrons are derions and cannont be placed in the same state

    • C. 

      Every element has the same number of electrons

    • D. 

      None of the above

  • 30. 
    Name a planet that is visible in the night sky this month
  • 31. 
    Quantam field theory combines quantam mechanics and
    • A. 

      Special relativity

    • B. 

      General relativity

    • C. 

      Special and general relativity

    • D. 

      Newtonian mechanics

  • 32. 
    Quarks interact
    • A. 

      Strongly at long distances and weakly at short distances

    • B. 

      Strongly at short distances and weakly at long distances

    • C. 

      Always strongly

    • D. 

      Always weakly

  • 33. 
    The decision to record an event is made by a detectors
    • A. 

      Tracker

    • B. 

      Calorimeter

    • C. 

      Trigger

    • D. 

      None of these

  • 34. 
    The Higgs boson was discovered at the
    • A. 

      Tevatron

    • B. 

      Large Hadron Collider

    • C. 

      Relatavistic Heavy Ion Collider

    • D. 

      None of these

  • 35. 
    Stars draw their power from
    • A. 

      Matter-antimatter annihilation

    • B. 

      Fission of Uranium

    • C. 

      Fusion of hydrogen into helium

    • D. 

      Burning hydrogen

  • 36. 
    The standard Model includes a description of quantam gravity
    • A. 

      True

    • B. 

      False

  • 37. 
    The expansion rate of the universe is currently determined by
    • A. 

      Matter

    • B. 

      Photons

    • C. 

      Dark matter

    • D. 

      Dark energy

  • 38. 
    The CMB Photons originated in
    • A. 

      The big bang

    • B. 

      The era of atoms

    • C. 

      The era of inflation

    • D. 

      Distant galaxies

  • 39. 
    The CMB photons are primarily microwaves because
    • A. 

      They were cooled by interstellar gas clouds

    • B. 

      The universe has expanded significantly

    • C. 

      They began as microwaves

    • D. 

      Microwaves travel the greatest distances

  • 40. 
    Which of the following is not evidence for dark matter
    • A. 

      Galactic velocity profile

    • B. 

      Gravitational lensing

    • C. 

      Dark clouds that hide the center of the milky way

    • D. 

      Binding of galactic clusters

  • 41. 
    The following lists all summarize the content of the Universe. Which list is in the order of increasing contribution
    • A. 

      Dark matter, Ordinary matter, dark energy

    • B. 

      Dark matter, dark energy, ordinary matter Dark matter, dark energy, ordinary matter

    • C. 

      Ordinary matter, dark energy, dark matter

    • D. 

      Ordinary matter, dark matter, dark energy

  • 42. 
    New star formation is most common in
    • A. 

      Elliptical galaxies

    • B. 

      Spiral galaxies

    • C. 

      Irregular galaxies

    • D. 

      Intergalactic space

  • 43. 
    The many worlds hypothesis states that each possible outcome of an event does take place in some universe
    • A. 

      True

    • B. 

      False

  • 44. 
    The initial nonuniformities that gave rise to the galaxies were due to
    • A. 

      Thermal fluctuations

    • B. 

      Dark matter

    • C. 

      Quantam fluctuations

    • D. 

      Suepernovae

  • 45. 
    The arms of a spiral galaxy are
    • A. 

      Sound waves

    • B. 

      Rigid structures

    • C. 

      Density waves

    • D. 

      Permanent

  • 46. 
    Which of the following in unlikely in a collision of galaxies
    • A. 

      Tidal tails

    • B. 

      New star formation

    • C. 

      Stellar collisions

    • D. 

      Merger of central black holes

  • 47. 
    Which of the following is not evidence of the big bang model
    • A. 

      Olbers paradox

    • B. 

      Expansion of the universe

    • C. 

      More distinct galaxies are younger

    • D. 

      The presence of iron and other heavy elements

  • 48. 
    For a star such as the sun, the typical life cycle is to become a red giant, then a
    • A. 

      Neutron star

    • B. 

      White dwarf

    • C. 

      Black hole

    • D. 

      Brown dwarf

  • 49. 
    Which type of star lives the longest
    • A. 

      Low mass

    • B. 

      Solar mass

    • C. 

      High mass

    • D. 

      Elliptical

  • 50. 
    Which of the following lists is in the order of increasing size
    • A. 

      Atom, molecule, nucleus, proton

    • B. 

      Proton, atom, nucleus, molecule

    • C. 

      Proton, nucleus, atom, molecule

    • D. 

      Nucleus, proton, atom, molecule

  • 51. 
    Nuclear fusion is driven by
    • A. 

      Electromagnetism

    • B. 

      The weak force

    • C. 

      The strong force

    • D. 

      Dark energy

  • 52. 
    Sunspots and solar flares are consequences of
    • A. 

      Asteroid collisions

    • B. 

      Magnetism

    • C. 

      The suns rapid rotation

    • D. 

      Nonuniform fusion rates

  • 53. 
    The current rise in global temperatures is primarily caused by an increase in solar output.
    • A. 

      True

    • B. 

      False

  • 54. 
    The dying Sun will produce iron to be recycled in future solar systems
    • A. 

      True

    • B. 

      False