Question

How exactly does an explosion of lets say a grenade kill you?

Is it due to the g force being pushed upon your body? What exactly in a huge explosion kills you?

Answer

A grenade or big an explosion can create a "P-wave" which needs a medium to travel through. So in theory if a grenade did not have any shrapnel you would be able to survive near a grenade in space because there is no way the pressure wave can travel towards you.

Jun 8 at 4:12

It's actually the pressure wave that is created, along with the metal fragments called shrapnel.

With a grenade, it's mostly the shrapnel. Larger munitions use the pressure wave to kill.

Here's a video showing a pressure wave:

http://www.youtube.com/watch?v=MyparYJ7P…

Jun 8 at 7:58