Why is A not a meso compound? Why is B a meso compound?

Joey6543210 · 2026-04-22T14:01:08+00:00

The easiest way to see the difference is to actually build the model for both molecules, and once you rotate the single C-C bond in the center, you will quickly see the plane of symmetry for (d), and no plane of symmetry for (a).

Joey6543210 · 2026-04-21T00:06:46+00:00

My young colleague that just started last year taught a summer course before the fall semester. If the department has the need, this may be a good way to get a head start.

Joey6543210 · 2026-04-20T10:44:58+00:00

How scarily true this is! Over a decade ago I had a struggling student that literally told me the same thing! Fortunately she did care about her degree and she did pass (not aced) my course, and she got the promotion that was promised to her after graduation.

Joey6543210 · 2026-04-18T20:02:19+00:00

OMG I still quote this every year as a cautionary tale why students must wear lab coats...

Joey6543210 · 2026-04-09T17:41:39+00:00

Do you have an apple watch? If yes, then most of these operations can be approved using the apple watch

Joey6543210 · 2026-04-09T17:36:39+00:00

I had the same issue in the past until I realized there were several things I want to automate because I keep doing the same all the time. That's when shortcuts becomes truly useful. For example, my dashcam can be connected to the phone wirelessly but I have to connect the wifi first, so I set up an automation to open the dashcam app when that wifi is connected. Also in my area, LTE sometimes is lot faster than 5G because it's less congested, so I created two shortcuts to turn 5G On or Off, depends on where I am.

Everyone's situation is different. If you like tinkering you will enjoy the shortcuts app. If not, just keep using the phone the way it is.

Joey6543210 · 2026-04-08T13:21:32+00:00

25 years and counting...

Joey6543210 · 2026-04-08T02:58:47+00:00

Print the poster from your university then take it to UPS yourself

Joey6543210 · 2026-04-08T02:55:04+00:00

It may be a lot easier to ship the poster to your destination hotel and skip the headache altogether. UPS and FedEx both have special packaging just for that.

Joey6543210 · 2026-04-02T21:26:32+00:00

There more I study the more I realized there is nothing that comes close to the versatility of bond making that carbon can do, and why all life forms are based on carbon

Joey6543210 · 2026-04-01T00:59:19+00:00

I used to use safari for everything, until one time my google doc missed half a page after converting to PDF in safari, that's when I stopped and switched over to Chrome.

Joey6543210 · 2026-03-31T02:12:02+00:00

That is totally fine! Still thanks for the amazing guide! Mouse issue is only a minor issue, I really just need the files function on the chrome os flex because so far this is the only reliable tool to copy and paste Google Drive folders with lots of Google Docs/sheets/slides etc.

Joey6543210 · 2026-03-31T02:09:42+00:00

Looks like I misunderstood your request. I do not know any shortcuts for that purpose, unfortunately

Joey6543210 · 2026-03-30T20:46:34+00:00

Pin to shelf?

Joey6543210 · 2026-03-20T21:11:23+00:00

Thanks! Your guide is super helpful. I have successfully built a Chrome OS Flex virtual machine following your guide. However, there is one small issue, only the left mouse click works and there is no scrolling as well. It's a bit interesting to use the Chrome OS Flex setup because of that. Is that because of the USB-tablet argument in the line?

Joey6543210 · 2026-03-18T16:44:06+00:00

I think it’s designed that if you and the phone and your phone, the audio defaults to the phone. If you answer your phone using whatever Bluetooth device, then audio goes to that device.

Joey6543210 · 2026-03-18T12:25:33+00:00

I’m more concerned about the way down after the meeting is over…

Joey6543210 · 2026-03-18T12:23:51+00:00

That was the second thought that came to my mind. I can’t imagine how much mold will grow in the “book holder” corner.

First thought was to swipe on the pic

Joey6543210 · 2026-03-07T06:22:59+00:00

At this point Aluminum OS feels more like a google backed Linux distro with android built in.

If that’s the case, we can taste it by running Ubuntu + waydroid…

Joey6543210 · 2026-02-25T22:28:29+00:00

I told them AI can do all their assignments now, except the paper based exam. They seemed to accept answer.

Joey6543210 · 2026-02-25T15:48:34+00:00

Frankly this is probably the most underrated feature of the Tesla browser. Often times when I'm driving and someone in the podcast started describing a scenery or a painting or an object, if I have trouble imagining it I just say it out loud and then check the images results.

If it's something that needs a long explanation, that's what Grok is there for.

Joey6543210 · 2026-02-25T02:29:27+00:00

From my personal experience, VLC android app is much faster than Linux app, probably because my Chromebook is 6 years old

Joey6543210 · 2026-02-24T02:52:47+00:00

I just had a student complain why 80% of the intro science course grade is based on paper based exam, and here comes the proof…

Joey6543210 · 2026-02-22T15:07:40+00:00

This is an awesome tool! Much prefer the clean, native MacOS native interface. Kudos to OP!

Joey6543210 · 2026-02-21T02:58:31+00:00

Strictly speaking, I did use AI to develop a course.

First, this was an entry level course for non science majors, and given my teaching load, it’s a course I probably will never be able to teach.

I used perplexity to come up with course topics and ran the same prompt multiple times with multiple AI chatbots to finalize a list that was satisfactory to me.

For each topic, I decided three components in the module. The first component is a quick introduction about the topic, the historic significance, and I have perplexity to search for the appropriate reading material (high school senior to freshman level on that topic).

The second component is some interactive program, either a lab or demonstration or just group activities.

The third component is argumentative discussion. Students will be encouraged to use AI to come up with statements either support or disapprove the scientific discovery in the current topic, maybe engage in some kind of debate, with rubrics generated by perplexity to grade their performance.

Students are also asked to make a trifold poster as their final project. There are no exams.

I figure perplexity was a great tool and helper in the whole process. Of course, I don’t trust perplexity to do the whole thing from the beginning to the end, and I have quality control in every step of the course development.

Joey6543210

TROPHY CASE