physics 2

8. When combing your hair, you scuff electrons from your

hair onto the comb. Is your hair then positively or negatively

charged? How about the comb?

38. If you rub an inflated balloon against your hair and place

it against a door, by what mechanism does it stick?

Explain

26. Are automobile headlights wired in parallel or in series?

What is your evidence?

22. Your friend says that, when a compass is taken across the

equator, it turns around and points in the opposite direction.

Your other friend says that this is not true, that people

in the Southern Hemisphere use the south magnetic

pole of the compass to point toward the nearest pole.

You’re on; what do you say?

2. A common pickup for an electric guitar consists of a coil of

wire around a small permanent magnet, as described in Figure

25.5. Why will this type of pickup fail with nylon strings?

6. Why does classical physics predict that atoms should

collapse?

28. When and where do Newton’s laws of motion and

quantum mechanics overlap?

14. The water that passes through the reactor core of a watermoderated

fission reactor does not pass into the turbine.

Instead, heat is transferred to a separate water cycle that is

entirely outside the reactor. Why is this done?