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

Multiple Choice Questions

1. Under string theory, which of the following is true regarding extra dimensions?
(a) They must all be space-dimensions.
(b) They must all be space-dimensions, or they must all be time-dimensions.
(c) Some or all of them might be time-dimensions.
(d) They must all be time-dimensions.

2. What discovery about string theory triggered the "superstring revolution"?
(a) Einstein announced that it exactly matched his formulas for general relativity.
(b) It was found to encompass the four fundamental forces of matter.
(c) Its approximate equations were solved for the first time.
(d) It was experimentally confirmed at Fermilab in the US.

3. What are the components of an atomic nucleus?
(a) Electrons and neutrons.
(b) Protons and electrons.
(c) Protons and neutrons.
(d) Photons and electrons.

4. Which of the following is true regarding the force of gravity in string theory?
(a) Gravity in string theory is stronger than what we actually observe.
(b) Gravity in string theory acts over much longer distances.
(c) String theory predicts gravity.
(d) Gravity is not addressed in string theory.

5. When a Calabi-Yau space collapses, it comes back as a space. What distinction does it have?
(a) It has mirror-symmetry with its old shape.
(b) It has no shielding against tears in space-time.
(c) It has one fewer dimensions.
(d) It has one less hole.

Short Answer Questions

1. What spin do all particles of matter have?

2. What does the second law of thermodynamics state about entropy for a closed system?

3. According to general relativity, all objects that have mass have what effect on space-time?

4. What is a string's winding number?

5. What does the string coupling constant govern?

(see the answer key)

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