<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/dd25451c-1d62-4058-93e7-e007706a4893/9C32D869-76F8-4871-9A62-AA90588DA53D/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html" href="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html" style="font-size: 11px;">photowebs.blogspot.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><BLOCKQUOTE>Some scientists describe it as the visible manifestation of jet aircraft "breaking the sound barrier" (or creating a "sonic boom"). Others contend that these vaporous cones only form at "transonic" speeds (just under or over the speed of sound), may or may not be accompanied by a sonic boom, and strictly speaking have nothing to do with breaking the sound barrier. They are caused by a sudden drop in air pressure around the aircraft (see Prandtl-Glauert singularity). <A href="http://urbanlegends.about.com/library/bl_sonic_boom2.htm">(about.com)</A><BR /></BLOCKQUOTE></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/photowebs.blogspot.com/img/65AB3199-E565-4A8E-8CDD-5DD639334F74" alt="jet that break sound barrier" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/photowebs.blogspot.com/img/6CBB4530-E4A2-4FA4-92C7-DF91D3DA5D88" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><div align="center"><img src="http://content6.clipmarks.com/blog_cache/photowebs.blogspot.com/img/AE25EC47-973F-4FB3-9A94-970DEDB48E97" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><div align="center"><img src="http://content7.clipmarks.com/blog_cache/photowebs.blogspot.com/img/DE8599F2-9251-41C1-8884-EF5AAA2F5543" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><div align="center"><img src="http://content8.clipmarks.com/blog_cache/photowebs.blogspot.com/img/F51AF6B6-B513-49F4-804A-AB17EB166AFD" alt="" /></div></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://photowebs.blogspot.com/2007/05/jet-aircraft-breaking-sound-barrier.html"><div align="center"><img src="http://content9.clipmarks.com/blog_cache/photowebs.blogspot.com/img/24160297-72D8-4E4D-B2C1-BD16D3389EE5" alt="" /></div></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/9C32D869-76F8-4871-9A62-AA90588DA53D/blog/" title="blog or email this clip"><img src="http://content6.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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