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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5, Protecting the Past.

Multiple Choice Questions

1. What can p-branes predict?
(a) The rates of emission that the molecules emit.
(b) The rates of consumption that the real-particle pair indicates.
(c) The rates of condensation that the virtual-particle trio indicates.
(d) The rates of emission that the virtual-particle pair indicates.

2. According to Popper, what happens if positivism is true?
(a) We cannot believe in time.
(b) We cannot say what time is.
(c) We cannot say what space is.
(d) We lose all negativity.

3. What kind of theory do we not have yet that is essential to figuring out time travel?
(a) Feynmann's historical theory.
(b) Gravitational theory.
(c) Quantum gravity theory.
(d) Simmon's spacetime theory.

4. What is vacuum energy's force inverse to?
(a) Mass.
(b) Force.
(c) Weight.
(d) Acceleration.

5. What does Hawking resist believing in?
(a) One dimension.
(b) Never-ending dimensions.
(c) Ten dimensions.
(d) Extra dimensions.

Short Answer Questions

1. What may imaginary time surfaces actually be?

2. What is one of the twentieth century's greatest discoveries?

3. What does Hawking think black holes radiate?

4. How were people's views of space-time changed because of Einstein's work?

5. What may be a law of nature?

(see the answer key)

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