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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Fifteen, Prospects.

Multiple Choice Questions

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

2. What is the Planck tension?
(a) The pull between strings at the Planck length.
(b) The attraction felt by a string through the strong force.
(c) The typical tension in a string.
(d) The vacuum-energy of a matter and anti-matter string pair.

3. Tears in space-time are technically termed _____.
(a) Topology-changing transitions.
(b) Discrete abrogation events.
(c) Zero-point alignments.
(d) Flops.

4. What prevents the potentially dangerous effects of an exposed tear in space-time?
(a) Tears only widen to about the Planck length.
(b) Tears occur in curled-up dimensions.
(c) Tears are quickly mended by the force of gravity.
(d) Tears are shielded by strings.

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

Short Answer Questions

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

2. What two major branches of modern physics does string theory incorporate?

3. Which of the following is one of the difficulties in observing super particles?

4. What is different about a particle of antimatter, compared to its normal counterpart?

5. If a clock were accelerated to nearly the speed of light for a year's time, which of the following would be true of its reading at the end of that time?

(see the answer key)

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