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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 6, Nothing but Music, The Essentials of Superstring Theory.

Multiple Choice Questions

1. How many dimensions did the tiny objects involved in the original statement of string theory have?
(a) Four.
(b) Two.
(c) Three.
(d) One.

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

3. According to general relativity, which of the following is said to warp or bend space-time?
(a) Accelerated motion and gravity.
(b) Accelerated motion and orbital motion.
(c) Gravity and electromagnetic fields.
(d) Constant, relativistic speed motion.

4. What is the fundamental force responsible for keeping the nucleus of an atom "glued" together?
(a) The nuclear-strong force.
(b) Potential electrical force.
(c) Quantum-tunneling force.
(d) Gravitational force.

5. According to general relativity, the change that an object causes in the fabric of space-time depends directly on _____.
(a) Its mass.
(b) Its density.
(c) Its direction compared to the observer.
(d) Its proximity to another massive body.

Short Answer Questions

1. How can black holes be detected?

2. According to Einstein's theory of general relativity, if two objects have a gravitational pull on one another, and one changes its mass or distance from the other, how quickly does the effect of this change travel to the other object?

3. What discovery about string theory triggered the "superstring revolution"?

4. What characteristic did Werner Heisenberg discovered that some features of the universe at very small scales, and some properties of particle?

5. What rule did Max Planck discover the electromagnetic waves bounded in a container, such as an oven, must follow?

(see the answer key)

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