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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. According to Newton's law of gravity, the strength of the pull between two objects depends on what factors?
(a) Their masses and the distance between them.
(b) Their masses and potential energies.
(c) The distance between them and their average atomic numbers.
(d) Their densities and the strength of the gravitational field they occupy.

2. According to general relativity, which of the following is said to warp or bend space-time?
(a) Gravity and electromagnetic fields.
(b) Constant, relativistic speed motion.
(c) Accelerated motion and orbital motion.
(d) Accelerated motion and gravity.

3. According to general relativity, all objects that have mass have what effect on space-time?
(a) They fold space-time as they move past one another.
(b) They tear space-time when they travel at near-light speeds.
(c) They warp space-time around them.
(d) They stretch space-time for other very distant objects.

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?
(a) Quantum mechanics and the photoelectric effect.
(b) General relativity and special relativity.
(c) General relativity and quantum mechanics.
(d) Gravity and general relativity.

5. Edwin Hubble used Einstein's theories to show that the fabric of the universe _____.
(a) Is not static, it must either be shrinking or expanding.
(b) Is uniform in all places and times.
(c) Is not flat, it is curved, either inwards or outwards.
(d) Has a finite boundary.

Short Answer Questions

1. According to special relativity, which of the following is true about the passage of time for an observer moving near the speed of light?

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

3. Who discovered the theory of general relativity?

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

5. What is the fundamental particle, the smallest possible bundle of energy, for the electromagnetic force?

(see the answer key)

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