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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Twelve, Beyond Strings, In Search of M-Theory.

Multiple Choice Questions

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

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

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

4. What is one of the difficulties in determining the shape of the Calabi-Yau space?
(a) The equations governing its shape are too complex.
(b) The shape has an unequal number of real and imaginary dimensions.
(c) No field of mathematics exists to support it.
(d) There are an infinite number of unknowns in its governing equation.

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

Short Answer Questions

1. What would an outside observer notice about an object moving near the speed of light?

2. According to general relativity, the change that an object causes in the fabric of space-time depends directly on _____.

3. What is supergravity?

4. What shape allows for the vibrational patterns that we observe in our universe?

5. What is the fundamental force responsible for keeping the nucleus of an atom "glued" together?

(see the answer key)

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