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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter Thirteen, Black Holes, A String/M Theory Perspective.

Multiple Choice Questions

1. Which of the following methods has been used to determine the shape of the Calabi-Yau space?
(a) The finite elements method.
(b) Discrete mathematics.
(c) Perturbation theory.
(d) Matrix manipulation.

2. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?
(a) It diminishes to one-half its original value.
(b) It is unchanged.
(c) It diminishes to one-fourth its original value.
(d) It quadruples.

3. The number of family groups corresponds to a feature of the Calabi-Yau shape. What is this feature?
(a) Its number of folds.
(b) Its number of holes.
(c) Its number of extended dimensions.
(d) Its degree of internal divisions.

4. Which of the following best describes a wormhole?
(a) A bridge between two points in space-time.
(b) The quantum-scale path left by a "tunneling" particle.
(c) The center of a black hole.
(d) A quantum-scale connection between two particles.

5. Who posited the existence of M-theory?
(a) Brandenberger.
(b) Witten.
(c) Greene.
(d) Plesser.

Short Answer Questions

1. What is entropy a measure of?

2. According to Newton's law of gravity, the strength of the pull between two objects depends on what factors?

3. 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?

4. Which of the following will occur after the collapse of the universe as predicted by string theory?

5. What characteristic of the string determines the properties of the particle it represents?

(see the answer key)

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