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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. Quantum physics began with the study of the energy inside a heated, closed container, such as an oven. The problem with theories at the time was that they predicted that _____.
(a) The oven can only store energy if it has no mass.
(b) The oven contains no energy.
(c) The oven can store more energy the smaller it is.
(d) The oven contains infinite energy.

2. Which of the following is closest to the Planck length?
(a) A millionth of a billionth of a billionth of a billionth of a centimeter.
(b) A millionth of a centimeter.
(c) A billionth of a billionth of a centimeter.
(d) A thousandth of a centimeter.

3. Black holes are dense and massive cosmological bodies. What unique distinction do they have?
(a) They are the only objects that emit gamma rays.
(b) Light cannot escape their gravitational well.
(c) They are the only types of stars that can produce uranium and heavier elements.
(d) Neutrinos always flow towards them.

4. What are the characteristics of a wave?
(a) Energy level, polarity, and speed.
(b) Amplitude and energy.
(c) Frequency, polarity, and wavelength.
(d) Frequency, wavelength, and amplitude.

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

Short Answer Questions

1. Which of the following is correct about the speed at which light moves?

2. What type of motion cannot be felt or sensed by the moving observer?

3. Which of the following is true about the tension within a string?

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

5. In Einstein's famous equation, E=mc^2, what does "c" represent?

(see the answer key)

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