Elastic collisions are where kinetic energy is conserved ... where the objects collide and separate with energy losses; and perfectly inelastic collisions, where the objects stick together and move as ...

Its hunting strategy combines speed, precision, and efficiency, perfectly adapted to its nutrient ... is made possible by a combination of elastic tension in the lobes and a swift change in ...

We got our hands on the best ski and snowboard helmets to give you our top picks when it comes to protecting your head out there in the snow. Here they are.

Investigators are intensifying their search into what caused the collision between American Airlines Flight 5342 and an Army Black Hawk helicopter, with recovery crews still working to pull ...

Despite decades of improvements in air traffic control systems and jet safety, midair collisions have remained a recurring, although extremely rare, part of aviation history. Wednesday's collision ...

Here's a look at how the tragedy unfolded, as the cause of the collision remains under investigation. Emergency response units assemble on the tarmac as search and rescue operations are underway ...

AND NEWS 9 ALSO HAD COMMUNICATION WITH THE FAA THIS AFTERNOON, WHO TOLD US THAT THEY WILL WORK WITH THE NTSB DIRECTL The investigation into the collision between an American Airlines passenger jet ...

Ari Shulman said a "spray of sparks" in the sky caught his attention as he watched in horror the midair collision between American Airlines Flight 5342 and a U.S. Army Black Hawk helicopter unfold.

The collision occurred while the helicopter with the 12th Aviation Battalion was conducting a routine training for pilots who take part in “continuity of government” missions, Defense ...

U.S. military helicopter crashes like the one that took down a commercial American Airlines flight over the Potomac River in Washington, D.C., on Wednesday night are very rare, but there has been ...

Authorities investigating the cause of this week's midair collision between an American Airlines regional jet and a military helicopter have recovered the black boxes from both aircraft.