January 2026 - Phy121s26

Access to restrcited areas of the Phy 121 Web
by Frank Wolfs, Physics and Astronomy, U of R 31 Jan '26

31 Jan '26

In order to access the restricted areas of the Physics 121 web, you wil need to enter the following username and password combination: Username: Phy121 Password: YE4sMsMsceoQcVj2poUycdzqHkvkeXgL Note: these are case sensitive. Using the username/password combination will give you access to the solutions of the homework assignments and the exams, and access to the software. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 273 - 3237 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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Slides for Tuesday
by Frank Wolfs 31 Jan '26

31 Jan '26

Attached are Tuesday’s slides. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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WebWork Question # 9
by Frank Wolfs, Physics and Astronomy, U of R 29 Jan '26

29 Jan '26

One comment to make on part b of question # 9 of HW # 1. When you specify the wind direction, you specify the direction from which the wind is originating. For example, air associated with a northerly wind (0 degree) flows towards the south. Make sure you enter the direction from which the air is flowing, not the direction towards which the air is flowing. The units to be used as part of the answer should be deg. Details on WebWork units can be found at https://wiki.openwebwork.org/wiki/Units This is a link that is listed in the Homework menu on the 121 website. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 273 - 3237 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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Thursday's slides
by Frank Wolfs 28 Jan '26

28 Jan '26

Attached are the slides for Thursday. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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WebWork help
by Frank Wolfs 26 Jan '26

26 Jan '26

As you are working on WebWork set # 1, please make sure you use all the resources that are available to you: 1. Attend your workshop to ask questions. 2. Attend the many office hours to discuss your WebWork problems. 3. As a last resort, press the button in WebWork. Our TAs will try to answer your questions. However, please do not to expect an answer to questions submitted after 6 pm on Fridays. Conclusion: make sure you start to work on your assignment early so that you can benefit from all of these available resources. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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Slides for Tuesday
by Frank Wolfs 26 Jan '26

26 Jan '26

Attached are the slide for Tuesday. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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No workshops today
by Frank Wolfs 26 Jan '26

26 Jan '26

Since the University cancelled classes today, there will be no workshops today (Monday). The first Phy 121 workshops will thus happen tomorrow, Tuesday. Those who have workshop today can attend any of the other workshops this week. For a schedule, see our course information at http://teacher.pas.rochester.edu/PHY121/CourseInformation/CourseInformation… Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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TLC Study Groups
by Frank Wolfs, Physics and Astronomy, U of R 25 Jan '26

25 Jan '26

I received an email from TLC about study group meetings for Phy 121: they are offered weekly on Fridays from 12:30 to 1:45 pm in Hylan 301. Additionally, their first-year support program, Study Groups at Night, will offer support for students in Phy121. This program runs on Tuesdays and Wednesdays from 8 to 10 PM in Friel Lounge in Sue B, starting on February 17th! Although the program is primarily aimed at first-year students, any student in one of the supported courses is welcome to attend, regardless of their class year. Frank Wolfs

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Workshops
by Frank Wolfs 22 Jan '26

22 Jan '26

Just a reminder that workshops will start next week on Monday. There was one mistake on the course information page which listed the location of Thursdays 3.25 pm workshop as B&L 269. The correct location is Hylan 305. I have corrected this on our website and on the course calendar. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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Correction to slide 59 of Lecture 1
by Frank Wolfs 22 Jan '26

22 Jan '26

This morning, during office hours, I discovered a mistake on slide 59 of the slides I used on Tuesday. The equation showing the standard deviation of the weighted average was not squared. I have attached the corrected slide. Thanks to Benjamin for discovering this problem. Frank Wolfs _____________________________________________________________________ Frank L. H. Wolfs e-mail: wolfs(a)pas.rochester.edu Department of Physics and Astronomy University of Rochester B&L 203A, RC Box 270171 fax: (585) 275 - 8527 284 Hutchison Rd. phone: (585) 210 - 3271 Rochester, NY 14627 http://teacher.pas.rochester.edu/

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