The Elegant Universe: Superstrings, Hidden Dimensions, and the Quest For… Test | Mid-Book Test - Easy

Brian Greene
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This test consists of 15 multiple choice questions and 5 short answer questions.

Multiple Choice Questions

1. According to special relativity, which of the following can move faster than light?
(a) Gravitational waves.
(b) Nothing can move faster than light.
(c) Neutrinos.
(d) Quantum data.

2. Which of the following is true regarding the mass and spin of a pair of superpartners?
(a) They have the same mass, and their spins differ by 1/2.
(b) Their masses and spins are not related.
(c) They have the same mass and spin.
(d) They have unrelated masses, and their spins differ by 1.

3. Which of the follow is true of objects with which string theory is concerned?
(a) The objects are purely imaginary.
(b) They include strings and other objects as well.
(c) It concerns one-dimensional strings and nothing else.
(d) They are all really Calabi-Yau shapes.

4. Which of the following is true regarding experimental confirmation of string theory?
(a) It can never be confirmed.
(b) It has been experimentally confirmed, but the data are still being processed.
(c) It was confirmed in the 1980s.
(d) It has not yet been experimentally confirmed.

5. What are the vibrational patterns that a string can exhibit called?
(a) Notes.
(b) Harmonics.
(c) Resonances.
(d) Chords.

6. What type of motion cannot be felt or sensed by the moving observer?
(a) Constant-velocity movement.
(b) Slowing or decelerating movement.
(c) Orbital movement around a star.
(d) Accelerating movement.

7. Which of the following is one of the major problems in using both quantum physics and general relativity?
(a) General relativity is time-dependant, quantum physics is a steady-state 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 a wave theory, but quantum physics is a particle theory.

8. What type of a wave is light?
(a) A photonic wave.
(b) An electromagnetic wave.
(c) A gravitational wave.
(d) An electrical wave.

9. In which particle was spin first discovered?
(a) The electron.
(b) The neutron.
(c) The photon.
(d) The proton.

10. What are the components of an atomic nucleus?
(a) Photons and electrons.
(b) Electrons and neutrons.
(c) Protons and neutrons.
(d) Protons and electrons.

11. What discovery was made that incorporated gravitational force into quantum mechanics via string theory?
(a) A vibrational pattern with the properties of the graviton was discovered.
(b) Gravity could be made symmetric only if the graviton is a string.
(c) Gravity was found to be supersymmetric.
(d) At extremely small scales, gravity is fused with the strong force.

12. According to special relativity, which of the following is true about the passage of time for an observer moving near the speed of light?
(a) No time would pass at all.
(b) Time would pass slowly compared to an observer at rest.
(c) Time would pass very quickly compared to an observer at rest.
(d) The passage of time could not be predicted.

13. According to string theory, why do different particles have different properties?
(a) Their strings are vibrating in different patterns.
(b) Their strings do not have the same number of dimensions.
(c) They have different types of strings.
(d) Their strings are different lengths.

14. Which of the following accurately describes the phenomenon of "quantum tunneling"?
(a) Some particles are linked together, no matter how much space separates them.
(b) High-energy waves can penetrate the fabric of space-time for very short periods of time.
(c) Particles can sometimes "borrow" energy to move in ways impossible in classical physics.
(d) Particles with high energy can vanish in one location, instantly appearing in another.

15. Which of the follow best describes a boson?
(a) The super-partner of a proton.
(b) The supersymmetric version of a proton.
(c) A particle of energy, a messenger particle for a force.
(d) A particle of matter.

Short Answer Questions

1. What are the characteristics of a wave?

2. What characteristic did Werner Heisenberg discovered that some features of the universe at very small scales, and some properties of particle?

3. What does the quantum electroweak theory state about the two fundamental forces it describes?

4. What is the quantum, or messenger particle, of the strong force?

5. Quantum electroweak theory concerns quantum mechanics and _____.

(see the answer keys)

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