My R1 and R2 in the spreadsheet are defined such that R3 is the resistance in series with the capacitance, and then R2 is the one in parallel with the combo of R3 and C.

6 Flags Magic Mountain Field Trip is Tuesday, May 28. Attending this trip is optional.

 

Students, to get cleared by your parents to go on this trip, you must direct them to this site:

 

 

where they will take action to clear you.

 

Students, once your parents have cleared you, to go on the trip, you must bring me the F-602 Form and payment (check payable to PVHS) together no later than Wednesday, May 22. The cost will be $85*. I will only accept the complete F-602 Form and the payment at the same time.

 

The trip is not officially happening until there are enough students to fill at least one bus. (Two are ordered.) If not enough students sign up to go, both buses get cancelled on May 22, and the checks are all returned to students/families to be destroyed. If there are enough students for one bus but not two, then one bus will be cancelled. Suppose the bus can only take 50 students, but 70 students get cleared, hand in their forms, and hand in their payment. In such an event, 50 students will go, and the other 20 will not. The 50 who go will be determined by First-Come-First-Served Priority. Priority for attending the trip will be given to the first 50 who got cleared (via the link above), handed in the F-602, and handed in the payment. This means that when students hand in the F-602 and check, I will put a number on the form with lowest number meaning earliest handed in. F-602 forms are available as hard copy directly from Mr. Warren and there is also an electronic version on the link above. (But the copy directly from Mr. Warren is preferable, because of information he wrote on it.)

 

*The $85 figure was arrived at from a calculated budget that I will share in class. For the trip to come in just under budget (meaning it will not be cancelled) there needs to be a minimum of 48 students signed up to go. (At 48 students, the projected cost comes out to $84.80 per student.)

Final Exam is on Thursday May 2

 

Proto-Practice AP: These are old AP Physics B MC exam questions compiled into a file.

 

Answers to the attached file:

 

1. c

2. a

3. c

4. c

5. b

6. a

7. c

8. e

9. c

10. a

11. d

12. c

13. e

14. e

15. a

16. a

17. b

18. e

19. d

20. d

21. e

22. d

23. d

24. c

25. d

26. a

27. e

28. A

29. d

30.

 

When you use the site, click "Show only the highest energy electrons." Also, I found a better way to get the stopping potential. But it's not in the directions yet. It involves using the current meter.

 

The other two attachments are more generally about Quantum Physics

 

 

 

1) You open the attached "Balmer versus Paschen Discovery" file.

You fill in the wavelengths as measured by the class. 3 are needed. People said they would agree to contact their friends to know the value of the two wavelengths that they didn't measure. Every individual should be personally responsible for one of the three (having measured it and calculated it) and obtaining the other two from other groups. If people who nodded in class were lying to me and are NOT willing to obtain the other two wavelengths from other people, then those people will be expected to use their own single one that they measured and then the other two from the fake example described below in instruction step 2. (The numbers in the fake example are not accurate, so don't copy them. They will give inaccurate results. They are here to provide an example of my instructions.)

Labeling in the spreadsheet makes it obvious which column to put the wavelengths into. And I labeled most of the other columns with "Ignore" and I mean that. Only the wavelength column and Column A of the spreadsheet will be used in this homework. To see how to use Column A, read instruction step 2.

 

2) You use the spreadsheet to best guess which set of 3 successive integers in column A best gives a line pattern when the reciprocal of lamba is plotted versus the reciprocal of the square of n. The manipulated graph gets automatically made when the wavelengths are put in and the 3 successive integers are guessed. (If you don't see the graph automatically change in front of your, then the spreadsheet isn't working right.) For example, entries for the three rows in column A could be 10, 9, and 8 in that order. Open the attached example file to see what I mean. It's the one that has word Example in the title. When you open it, you will see that someone has input the three wavelengths of 700 nm, 460 nm, and 420 nm. (In the example, these would have been the class labgroup best results (but in real life, they're not great results, pretty inaccurate.)). After inputting the three wavelengths, the scientist has guessed that the three consecutive integers 10, 9, and 8 should go in Column A. The quality of this guess will be judged by how high quality a line is formed from the three data points that result on the maniuplated graph. By now, you are supposed to have looked at the graph to see how it came out. Not great, but what do you have to compare it to? Make changes to find out, as instruction step 3 describes.

 

3) So now, in the example file, change the guesses in Column A to 8, 9, and 10. Do it. Watch the graph automatically change. The linearity of the graph did improve, but I'll bet it could be better still. So now try a different set of three consecutive integers.

 

4) Consider the homework done when you find the best set of three consecutive integers that make a linear pattern when inverse of lamba is plotted versus the inverse square of n. But do it with the non-example file, and use actual class measured wavelengths as measured on March 13 and 15, 2019.