Results
|
Max. Possible | 68 |
|
Median | 55 |
|
Mean | 53.6 |
|
Standard deviation | 6.1 |
|
High score | 65 |
Rough Grade Scale
( These assignments are highly approximate, since the scores from all course components are combined before a grade is assigned at the end of the semester.) |
Grade | Score range |
|
4.0 | 62 - 68 |
|
3.7 | 59-61 |
|
3.3 | 56-58 |
|
3.0 | 53-55 |
|
2.7 | 50-52 |
|
2.3 | 47-49 |
|
2.0 | 44-46 |
|
1.7 | 41-43 |
|
1.3 | 38-40 |
|
1.0 | 35-37 |
Comments
In the following, the number in parentheses following the question number refers to the number of students who chose not to do that question.Q.1. (1)
Q.2. (11)
Q.3. (5)
Q.4. (15) I looked for pictures to be drawn of the standing wave for at least 5 times during a full cycle, so that the motion is really apparent.
Q.5. (6)
P.1. (2) part (vi) Partial credit was given for almost any answer that took into account the amplitude and period of the wave.
P.2. (8)
P.3. (26) This problem combines the ideas of a beat frequency and the Doppler shift. It was surprisingly unpopular for reasons that elude me.
P.4. (2) part (c) In your comments on the energy I looked for a complete explanation (see instruction #3) that identified the kinetic energy present as being due to the motion of some element of the string rather than of the waves themselves.
