Physics 1215 Reading Questions
Assignment #11

Chapter 21.8 - 21.10, 12.0 - 12.21

Reading Questions should be submitted electronically using this form. They are due by 8:00 a.m. on Wednesday, April 23, 2008.
Any Reading Questions arriving late will receive no credit.
Only hit the "Enter" key or the "Submit" button once. To move from one question to the next, hit "Tab" or use the mouse.
(This is a lot of reading from Chapter 12, but on the final exam you will only be responsible for the sections we actually cover in class. We may not cover all of the chapter.)

Please enter your name below. You must use your first and last name exactly as written in official class registration. Be careful with the spelling:
First: M. I. Last:
Section:
Last four digits of your student I.D.:

Answer the Reading Questions below. Please answer each question.

1. List some ways an LR circuit is similar to an RC circuit.

2. Is the magnetic energy density derived in Equation 21.51 only valid for an inductor or always valid?

3. Waves transport
matter but not energy.
energy but not matter.
energy and matter.
neither energy or matter.

4. What is the difference between a longitudinal wave and a transverse wave?

5. If a wave is described by a function of (x - vt), which direction is the wave moving?

6. What is the difference between a periodic wave and a harmonic wave?

7. If the tension in a string is doubled, what happens to the speed of a wave traveling on the string?

8. Are sound waves a result of molecules moving at different speeds or of pressure differences between the molecules? Explain.

9. A car is traveling toward you while sounding its horn. Is the pitch of the horns higher, lower, or the same for you compared with the pitch the driver hears?

10. A string of length L is held stationary at only one endpoint. What is the longest harmonic wavelength for this string?

11. Is it possible to make a periodic wave with any shape simply by adding up different sine and/or cosine waves?
Yes
No

Final Question: (This question must be answered to receive any credit). What is one thing from the chapter that you didn't understand or need clarified?

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