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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. What is the fundamental force responsible for keeping the nucleus of an atom "glued" together?
(a) Potential electrical force.
(b) Quantum-tunneling force.
(c) The nuclear-strong force.
(d) Gravitational force.

2. What characteristic of the string determines the properties of the particle it represents?
(a) Its frequency of vibration.
(b) The number of other strings with which it is threaded.
(c) Its mass.
(d) Its length.

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

4. The wave-like nature of the electron means that after a collision, _____.
(a) The electron has a range of possible locations.
(b) The electron will double in frequency.
(c) The electron can never be located again.
(d) The electron will disperse into a wave of energy.

5. In Einstein's famous equation, E=mc^2, what does "c" represent?
(a) The object's density.
(b) The speed of the object.
(c) The speed of light.
(d) The frequency of light.

Short Answer Questions

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

2. 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?

3. 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 _____.

4. What is the result when a particle of matter and a particle of antimatter are brought into contact?

5. Who discovered the theory of general relativity?

(see the answer key)

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