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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. 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) Has a finite boundary.
(c) Is not flat, it is curved, either inwards or outwards.
(d) Is uniform in all places and times.

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

3. What rule did Max Planck discover the electromagnetic waves bounded in a container, such as an oven, must follow?
(a) The energies of all waves inside the over must cancel out to zero.
(b) The frequencies of the waves must all be the same.
(c) There must be an even number of peaks and troughs.
(d) They must have a whole number of peaks and troughs that fit perfectly inside the container.

4. Einstein's equation, E=mc^2, states that which of the following are equivalent?
(a) Energy and light.
(b) Light and magnetism.
(c) Electricity and magnetism.
(d) Energy and mass.

5. When the distance between two objects is doubled, what happens to the strength of the gravitational pull between them?
(a) It is unchanged.
(b) It diminishes to one-fourth its original value.
(c) It diminishes to one-half its original value.
(d) It quadruples.

Short Answer Questions

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

2. What is the shape of all particles, at the smallest possible level, according to string theory?

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

4. 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 _____.

5. What is quantum foam?

(see the answer key)

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