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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. Which one of the following do physicists believe occurs at the central point of a black hole?
(a) Space-time becomes inverted.
(b) Space-time is torn.
(c) An infinite-time flop-transition occurs.
(d) A "white hole" is formed.

2. Which of the following most accurately describes the state of the universe?
(a) It is mostly static.
(b) It is about to begin contracting.
(c) It is expanding.
(d) It is collapsing.

3. Who provided the computer programming to process the results of the Morrison-Greene experiment?
(a) Yau.
(b) Rutherford.
(c) Tian.
(d) Aspinwall.

4. Greene suggests that black holes may be elementary particles that have undergone _____.
(a) A quantum fluctuation.
(b) A phase transition.
(c) A mirror-symmetry folding.
(d) A space-tearing flop transition.

5. Riemannian geometry describes the following objects: _____.
(a) Curved spaces.
(b) N-dimensional spheres.
(c) Six-dimensional manifolds.
(d) Finite, unbounded spaces.

6. The discovery of the tearing of space-time came from cooperation between experts in physics and _____.
(a) Mathematics.
(b) Engineering.
(c) Cosmology.
(d) Astronomy.

7. What did Stephen Hawking prove regarding black holes?
(a) The emit radiation.
(b) They are the most massive objects in the universe.
(c) Light cannot escape from them.
(d) They have electrical charge.

8. About how long did the "primordial synthesis" stage of the big bang last?
(a) Three minutes.
(b) Four seconds.
(c) One picosecond.
(d) Two years.

9. What property does an external black hole have?
(a) The minimum possible mass for its charge and spin.
(b) The maximum possible internal temperature.
(c) The minimum possible radiation.
(d) The maximum possible mass for its charge and spin.

10. String theory claims that super particles _____.
(a) Are massless.
(b) Do not exist.
(c) Are the only non-string particles.
(d) Come in pairs.

11. What type of a string can be massless?
(a) A string with more than one dimension.
(b) An unwrapped string.
(c) A non-vibrating.
(d) A non-oscillating string.

12. Why are the extra dimensions needed in string theory?
(a) To account for the infinite-energy problem.
(b) To provide more space for strings.
(c) To prevent the negative and infinite answers to its physical equations.
(d) To remove time from its equations.

13. Which of the following is true regarding tears in space time occurring in normal three-dimensional space?
(a) It has been proven that they can occur.
(b) They cannot occur.
(c) It is unknown whether or not they can occur.
(d) Such tears have been observed in particle accelerators.

14. At what scale of length is quantum geometry necessitated?
(a) The Riemann scale.
(b) Nanometers.
(c) The Planck length.
(d) Cosmological scales.

15. Kaluza-Klein theory units which two fundamental forces?
(a) Gravity and the strong force.
(b) Gravity and electromagnetism.
(c) The strong force and the weak force.
(d) Electromagnetism and the weak force.

Short Answer Questions

1. In ratios of what number do winding energies come?

2. When a black hole's entropy increases, which of its characteristics increases as well?

3. What is a virtual string pair?

4. The method of tearing space-time discovered by Greene and others is called _____.

5. The number of family groups corresponds to a feature of the Calabi-Yau shape. What is this feature?

(see the answer keys)

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