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PHYSICS 5B · Dis 2A

Physics for Life Sciences Majors: Thermodynamics, Fluids, Waves, Light, and Optics

Fall 2026Luch, N.5 units

Seats, time, final and grades

Seats

Closed.

46 of 46 enrolled.

Its lecture reads closed (198 of 198 · 1 over enrolled): you attend both, so this seat is not one you can take while that holds. There is no waitlist either, so the only way in is somebody dropping the lecture.

Meets

T 2:00pm-2:50pm

This discussion only. You also attend Lec 2.

Final

Thu 10 Dec, 11:30am to 2:30pm

One exam for the whole class, Los Angeles time.

Read 5 hours ago.

Grades

3.42
predicted, all instructors · 7,166 grades

7,166 letter grades, everyone who has taught PHYSICS 5B.

Read 29 minutes ago. This is a recent reading, not a live seat count.

dibs has seen this section open 4 times since 17 August. The last time was 30 August. 3 of those were readings where the capacity figure moved and the enrolled count did not, so dibs could not tell whether a seat existed and did not send an alert.

Enroll on the registrar (opens in a new tab) Sign in to watch for an opening

Watching is the one thing here that needs an account, because an alert needs somewhere to go. Everything else on this page works signed out.

Put this class on a board

A board is one quarter you are drafting, so it needs an account to live in. Signing in brings you straight back to this page, with this class still in front of you.

Before you can enroll

Registrar's Restrictions cell, read 23 hours ago: "Undergraduate Students Only".

Tell dibs what you have already taken and this line will say which of these you have. Your list.

From the registrar limited early, then open

Seats are held for entering students who enroll through New Student Orientation sessions beginning July 2, 2026. New student restrictions will be lifted on September 15, 2026 at 8 a.m. Wait lists are not possible because of the three-part structure (lecture, discussion, and laboratory). Students who retake Physics 5B must enroll in all three sections: lecture, discussion, and laboratory. Once enrolled, send an e-mail to mtran@physics.ucla.edu with your name, student ID number, and quarter in which you originally took the laboratory. You will be manually enrolled in the G99 laboratory. Any student attempting to hold a spot for another student is violating Student Conduct Code 102.23d and may be referred to the Office of the Dean of Students. See https://pa.ucla.edu/physics-and-astronomy-enrollment-information.html for more information.

The limit stands until 15 September, and lifts then. dibs still counts this class as one you can take, but not yet. This class is also Undergraduate Students Only, which that date does not lift.

Restrictions read 23 hours ago.

When it meets

Mon
Tue
Wed
Thu
Fri
6am
7am
8am
9am
10am
11am
12pm
1pm
2pm
3pm
4pm
5pm
6pm
7pm
8pm
9pm
10pm

Meets: T 2:00pm-2:50pm

Lecture: MWF 4:00pm-4:50pm

Physics and Astronomy Building 2434

Grades

3.42
predicted, all instructors · 7,166 grades

Of the 10 people in the grade record for PHYSICS 5B, the 2 with the most grades: SAMANI, JOSHUA FRED at 3.29 over 2,369 grades and HOLCZER, KAROLY at 3.84 over 959 grades.

A range
62%
P/NP
<1%
D/F/W
2.9%

Full grade history for PHYSICS 5B

What students say

dibs measures outcomes: grades, seats, how fast it fills. For what the class is actually like to sit in, BruinWalk has the reviews.

dibs has read this course’s reviews and none of them say what kind of work it sets, so dibs has nothing to show rather than a guess. Read from 198 reviews about 1 month ago. That is the reviewers being silent, and not a course that sets no work.

Reviews for PHYSICS 5B Search the reviews for N. Luch

Will it still be here

high risk chance of closing before your enrollment pass.

Final enrollment per term from four years of grade data. Summer excluded: different population, different pass structure.

  • 19121F
  • 17222W
  • 18922S
  • 17922F
  • 17423W
  • 18323S
  • 18223F
  • 19824W
  • 18624S
  • 19224F
  • 18425W
  • 18825S
  • 20325F
Enrollment by term: 21F 191, 22W 172, 22S 189, 22F 179, 23W 174, 23S 183, 23F 182, 24W 198, 24S 186, 24F 192, 25W 184, 25S 188, 25F 203

Peak 203 · most recent 25F at 203

Seats over time

Filled by 4 over about 2 months

4 times reopened
46 of 46 · no seats left
17 Aug 16:429 Sep 05:461 Oct 18:50
dibs read 168 of the 177 hours its hourly record covers, 95%, and did not look in 9. dibs had no hourly record before 24 Sep, which is the other 906 of 1083 plotted.46 of 46 enrolled at the newest reading, 29 minutes ago, and no seats left. Seats from 17 Aug 16:42 to 1 Oct 18:50, 42 to 46. dibs read 168 of the 177 hours its hourly record here covers, 95%. An hour marked as read confirms a check, not continuous monitoring. That check recorded no change; changes between checks may be missed. For 9 hours dibs was keeping a record and did not reach this section. Nothing before 24 September at 10:00, where this section's record starts, has a read either way, which is 906 hours of this window. Where the drawing is faint or broken, that never means the readings are doubtful. It means the stretch between them is unaccounted for.

A dot is a reading where something moved: the seat count, the status, or the waitlist. Flat between dots joins recorded counts; changes between reads may be missed. The line starts when dibs first saw this section rather than reaching back before it existed. The last one is the last time dibs read this section, moved or not: 29 minutes ago.

Show the readings (35)
Recorded Enrolled Capacity Status Waitlist Hours read
1 Oct 18:50 46 46 closed - 168 of 388, 211 no hourly record
15 Sep 15:02 46 46 closed - no hourly record
15 Sep 11:32 45 45 closed - no hourly record
3 Sep 01:40 43 45 open - no hourly record
2 Sep 22:40 42 45 open - no hourly record
2 Sep 18:40 42 44 open - no hourly record
2 Sep 15:40 42 45 open - no hourly record
2 Sep 13:40 42 44 open - no hourly record
2 Sep 11:40 42 45 open - no hourly record
2 Sep 10:40 42 44 open - no hourly record
2 Sep 09:40 42 45 open - no hourly record
1 Sep 01:40 42 44 open - no hourly record
31 Aug 23:40 42 43 open - no hourly record
31 Aug 22:40 42 44 open - no hourly record
31 Aug 21:40 42 43 open - no hourly record
31 Aug 19:40 42 44 open - no hourly record
31 Aug 16:40 42 43 open - no hourly record
31 Aug 15:40 42 44 open - no hourly record
31 Aug 13:40 42 43 open - no hourly record
31 Aug 12:40 42 44 open - no hourly record
30 Aug 01:40 42 43 open - no hourly record
22 Aug 00:55 43 43 closed - no hourly record
21 Aug 23:55 42 42 closed - no hourly record
21 Aug 22:55 43 43 closed - no hourly record
21 Aug 21:55 42 42 closed - no hourly record
21 Aug 20:55 43 43 closed - no hourly record
21 Aug 19:55 42 42 closed - no hourly record
21 Aug 18:55 43 43 closed - no hourly record
21 Aug 16:55 42 42 closed - no hourly record
21 Aug 14:55 42 43 open - no hourly record
21 Aug 12:55 42 42 closed - no hourly record
21 Aug 11:55 42 43 open - no hourly record
21 Aug 10:55 42 42 closed - no hourly record
21 Aug 09:55 42 43 open - no hourly record
17 Aug 16:42 42 42 closed - -
How readings and alerts work

A reading and an hourly record are different things, and most charts here hold more of the second missing than present. dibs has taken readings of a section since long before it began keeping an hour-by-hour log of when it looked, so the empty stretches are dibs saying it was not keeping that log yet, not that it looked and found nothing. That is the age of the record and not a fault.

Seat counts show the last successful read, not live availability. Refreshes can be delayed by request limits or upstream interruptions. Watched sections receive priority, but an hourly update for every section is not guaranteed.

The registrar can change a seat count between our checks. Alerts depend on dibs detecting an opening and completing delivery; a quiet watch does not prove that no seat opened. Check the registrar before enrolling.

Class chat

2 dibs readers watch this class or have it on a plan. Nobody has posted yet.

Dis 2A shares one room with Lec 2 and every other discussion under it, because that is what a student means by "my class".

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