User talk:81.110.249.197

June 2022
Hello, I'm A-NEUN. I wanted to let you know that one or more of your recent contributions&#32;to Mass–energy equivalence have been undone because they did not appear constructive. If you would like to experiment, please use the sandbox. If you have any questions, you can ask for assistance at the Teahouse. Thanks. A-NEUN TALK 08:26, 21 June 2022 (UTC)