User talk:Gellie09

May 2017
Hello, I'm RA0808. I wanted to let you know that I reverted one of your recent contributions —the one you made with this edit to Speed of sound— because it did not appear constructive. If you would like to experiment, please use the sandbox. If you think I made a mistake, or if you have any questions, you can leave me a message on my talk page. Thanks. RA 0808 talkcontribs 13:15, 15 May 2017 (UTC)