Beckeditor4
April 2024 edit
Hello, I'm DVdm. I noticed that you added or changed content in an article, Angular momentum, but you didn't provide a reliable source. It's been removed and archived in the page history for now, but if you'd like to include a citation and re-add it, please do so. You can have a look at referencing for beginners. If you think I made a mistake, you can leave me a message on my talk page. Thank you. DVdm (talk) 19:38, 23 April 2024 (UTC)
Please do not add or change content, as you did at Angular momentum, without citing a reliable source. Please review the guidelines at Wikipedia:Citing sources and take this opportunity to add references to the article. Thank you. DVdm (talk) 20:30, 23 April 2024 (UTC)
Note: you'll need something more than a (probably private) page on a university website for this. To establish notability of the content, Wikipedia needs at the very least a peer-reviewed publication in an established journal or relevant text book. - DVdm (talk) 20:34, 23 April 2024 (UTC)
Please stop. If you continue to add unsourced or poorly sourced content, as you did at Angular momentum, you may be blocked from editing.
Note: that source ([1]) says nothing whatsoever about "Founded by Aden Richards, a high school physics teacher in Washington, D.C", or about "a method of measuring angular momentum that simplifies the measurement of sine". You need to stop this. - DVdm (talk) 13:04, 24 April 2024 (UTC)