User talk:87.40.75.152

May 2009
Welcome to Wikipedia. The recent edit you made to the page Speed of sound has been reverted, as it appears to be unconstructive. Use the sandbox for testing; if you believe the edit was constructive, please ensure that you provide an informative edit summary. You may also wish to read the introduction to editing. Thank you. --Rrburke(talk) 13:32, 14 May 2009 (UTC)