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1. 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?

General relativity and quantum mechanics.

2. Who discovered the theory of general relativity?

Albert Einstein.

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

A cloud of electrons orbiting a dense nucleus.

4. In 1968 it was discovered that protons and neutrons are composed of which type of particle?

Quarks.

5. What are the components of an atomic nucleus?

Protons and neutrons.

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