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

2. In M-theory, what role does duality play?
(a) It allows space-tearing flop transitions to extend into extra dimensions.
(b) It helps to incorporate general relativity.
(c) It shows that the five theories are connected.
(d) It links electromagnetism and gravity.

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

4. 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?
(a) It would be more than one year.
(b) It would be less than one year.
(c) Its reading would be random and meaningless.
(d) It would be exactly equal to one year.

5. What is the fundamental particle, the smallest possible bundle of energy, for the electromagnetic force?
(a) The neutrino.
(b) The electron.
(c) The gluon.
(d) The photon.

Short Answer Questions

1. As a string becomes wrapped, which of its properties increases?

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

3. What is one possible way that the three dimensions we observe could have been "stretched out"?

4. Kaluza's theory suggested that electromagnetism was carried by ripples in _____.

5. Which of the following is one of the major problems in using both quantum physics and general relativity?

(see the answer key)

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