Warm-Up Exercise 20

Due 10:00 am, Tue, Feb. 19

Physics 123, Winter Semester, 2012

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Did you carefully complete the reading assignment?
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The boundary conditions for waves on a string with two fixed ends leads to a fundamental mode with a wavelength twice the length of the string. But what happens if one end is free and one end is fixed? Then what does the fundamental mode look like?

What does the mode look like if both ends are free? (You can imagine a string where each end is attached to a pole by a ring and they can move up and down freeling but the tension is maintained.)

Give an example of resonance from everyday life.

Was there anything that you didn't understand in the reading assignment? If so, explain.

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