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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 3, Of Warps and Ripples.

Multiple Choice Questions

1. In Einstein's famous equation, E=mc^2, what does "c" represent?
(a) The object's density.
(b) The speed of light.
(c) The speed of the object.
(d) The frequency of light.

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

3. In 1968 it was discovered that protons and neutrons are composed of which type of particle?
(a) Muons.
(b) Neutrinos.
(c) Baryons.
(d) Quarks.

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

5. How can black holes be detected?
(a) With an ultraviolet-range telescope.
(b) By observing the directions of solar winds.
(c) By looking for dark gaps in clusters of stars.
(d) By their effects on objects around them.

Short Answer Questions

1. According to general relativity, which of the following is said to warp or bend space-time?

2. Which of the following correctly describes the structure of an atom?

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

4. What is the shape of all particles, at the smallest possible level, according to string theory?

5. Einstein's equation, E=mc^2, states that which of the following are equivalent?

(see the answer key)

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