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This quiz consists of 5 multiple choice and 5 short answer questions through Chapter 5, The Need for a New Theory, General Relativity vs. Quantum Mechanics.

Multiple Choice Questions

1. 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) Near the speed of light, faster for more massive objects.
(b) Instantaneously.
(c) At exactly the speed of light.
(d) Near the speed of light, faster for lighter objects.

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) General relativity is time-dependant, quantum physics is a steady-state theory.
(c) At small scales, quantum physics predicts uncertainty, but general relativity requires certainty.
(d) Quantum physics predicts that all particles are massless.

3. Which of the following is not one of the four fundamental forces of the universe?
(a) The photoelectric force.
(b) Gravity.
(c) The electromagnetic force.
(d) The nuclear-weak force.

4. What is the quantum, or messenger particle, of gravity?
(a) The gravino.
(b) The graviton.
(c) The Calabi-Yau particle.
(d) The Einstein boson.

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

Short Answer Questions

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

2. What is quantum foam?

3. According to general relativity, all objects that have mass have what effect on space-time?

4. Two theories form the basis of modern physics, but are incompatible with one another. String theory attempts to reconcile these fields. What are these two theories?

5. According to Newton's law of gravity, the strength of the pull between two objects depends on what factors?

(see the answer key)

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