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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. Which team of researchers discovered the process for altering Calabi-Yau spaces by rupturing them?
(a) Greene and Morrison.
(b) Hawking and Fermi.
(c) Bohr and Feynman.
(d) Yau and Tian.

2. There are many possible Calabi-Yau spaces, but only shapes with which of the following characteristics are considered real possibilities?
(a) Those that solve the perturbation theory.
(b) Those that have no time-dimensions.
(c) Those that unify the four forces and have no extended dimensions.
(d) Those that meet the vibration requirements and have an appropriate number of dimensions.

3. According to Newton's law of gravity, the strength of the pull between two objects depends on what factors?
(a) Their masses and potential energies.
(b) The distance between them and their average atomic numbers.
(c) Their densities and the strength of the gravitational field they occupy.
(d) Their masses and the distance between them.

4. What does the string coupling constant govern?
(a) The strength of links between strings.
(b) The likelihood of strings joining or separating.
(c) The number of strings that can be joined at once.
(d) The relative length of threading between strings.

5. What characteristic did Werner Heisenberg discovered that some features of the universe at very small scales, and some properties of particle?
(a) They cannot be known with complete precision.
(b) They can change spontaneously, with no external influence.
(c) They always increase or decrease by certain increments.
(d) They are dependant on the velocity of the object being studied.

Short Answer Questions

1. What is the quantum, or messenger particle, of the weak force?

2. Which of the following qualities must a physical law have in order to be considered symmetric?

3. Which of the following most accurately describes the state of the universe?

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

5. Quantum electroweak theory concerns quantum mechanics and _____.

(see the answer key)

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