1. What exactly is the focal length of a lens or mirror? Is it where an image always forms? Under what circumstances do images form there?
2. What types of lenses or mirrors form real images? What types of lenses or mirrors form virtual images?
3. What is an interference pattern?
4. Given two circuits, one with 3 identical resistors in series and one with 3 identical resistors in parallel:
a. which one has the greatest resistance?
b. which one draw the most current from the battery?
c. which one will have brightest light bulbs (if the resistors in question were light bulbs)?
d. which one will kill the battery most quickly
5. What represents some of the best current "proof" that relativity is a real thing?
6. Why does a charged balloon stick to a wall?
7. When you "charge" something positively, what have you done? If you had charged something negatively, what have you done?
8. What are the primary components of motors?
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