Monday, October 10, 2005

Surprise, Surprise

Naval Officer John Gay shot this photo of a US F/A-18C Hornet breaking the sound barrier over the Pacific Ocean. At sea level a plane must exceed approx. 741mph to break the sound barrier, or the speed at which sound travels. The change in pressure as the plane outruns all of the pressure and sound waves in front of it is heard on the ground as an explosion or sonic boom. The pressure change condenses the water in the air as the jet passes these waves. Altitude, wind speed, humidity, the shape and trajectory of the plane-all of these affect the breaking of this barrier. (Photo: John Gay/US Navy)

From Electronic Intifada:

"Oh my God, not again!" Shouted taxi driver Abu Omar while sharply parking his car on the side of one of Gaza City's traffic-jammed streets. A thunderous explosion echoed throughout the city, as Israeli fighter jets broke the sound barrier over the Gaza Strip.

The old man's hands were shaking as passengers tried to calm him down and reassure him that it was only a loud sound. "I couldn't sleep well when it happened last night," sighed the Abu Omar. "This is simply unbearable."

It all started with an explosion on September 23, at a military rally for the militant Palestinian movement Hamas - its last before declaring an end to all weapon displays in the streets of Gaza.

The rally, which included thousands of Hamas members and supporters, was in progress at the packed Jabaliya refugee camp when an explosion shook the place and sent a large pillar of smoke in the air.

... click on the link above to read the whole article