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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 chromodynamics concerns quantum mechanics and ____.
(a) The strong force.
(b) Gravity.
(c) The weak force.
(d) The electromagnetic force.

2. Which of the following is one of the major problems in using both quantum physics and general relativity?
(a) General relativity is a wave theory, but quantum physics is a particle theory.
(b) At small scales, quantum physics predicts uncertainty, but general relativity requires certainty.
(c) Quantum physics predicts that all particles are massless.
(d) General relativity is time-dependant, quantum physics is a steady-state theory.

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

4. Which physicist is credited with discovering that light is composed of particles?
(a) Maxwell.
(b) Planck.
(c) Rutherford.
(d) Einstein.

5. According to Newton's theory of gravity, 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?
(a) At exactly the speed of light.
(b) Near the speed of light, faster for lighter objects.
(c) Instantaneously.
(d) Near the speed of light, faster for more massive objects.

Short Answer Questions

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

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

3. The smallest possible unit of energy is referred to as _____.

4. In the 1800s, James Clerk Maxwell used a new mathematical framework to unite _____.

5. What type of a wave is light?

(see the answer key)

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