User talk:217.158.77.86

September 2022
Hello, I'm Adakiko. I noticed that you made a change to an article, Mass–energy equivalence, but you didn't provide a source. I’ve removed it for now, but if you’d like to include a citation to a reliable source and re-add it, please do so! If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. Adakiko (talk) 11:04, 22 September 2022 (UTC)