Recent content by Zentrails

Not saying you are wrong, but doesn't Hawking believe the EH contains information?

A spinning BH is theorized to cause frame dragging. That may be a way to indirectly make some singularity measurements. Course, we haven't even been able to detect gravity waves yet.

Or maybe by accident, say if aliens are using a directed energy source of some sort to power "light sail" like spacecraft ?

A minor point, but actually our atmosphere does protect us from high energy neutrons which are absorbed by nitrogen to form carbon 14. Not sure the flux is much compared to charged particles, but I would call that a form of radiation. Mars' atmosphere is mostly CO2 with little nitrogen. Anyone...

It's quite possible that there is intelligent life in our solar system and we just don't have the capability to perceive it. If "God(s)" exists, that would be a good example. Or maybe beings made of dark matter, hive minds, etc. There are a lot of possibilities that I can imagine. I think it is...

Great pun relativistically speaking, but just to make sure the OP doesn't get confused I think you meant a particle traveling close to the speed of light rather than accelerated.

Assuming you mean "the vacuum of outer space," space is far from nothing. All sections of space have a temperature, significant photon flux, etc.

I would also ask what the OP considers to be "air" and how it deviates from an ideal gas.

This did indeed happen in equilibrium very shortly after the Big Bang. About 10-4 s, IIRC according to the Standard Model.

Not true, a photon does indeed have mass, it just doesn't have a "rest" mass.

alas, no radar tracking for the Russian meteor. http://news.silobreaker.com/all-rusian-radar-failed-to-track-meteor-5_2266616190333878274 But they are starting to find lots of meteorite fragments, which confirm that it was a mid-air explosion...

How the heck do you do that? That's impressive. You have some kind of specialized piezolectric microphone? I have EMIT tweeters in my Infinity speakers that I think go up to 100 KHz or maybe a little higher, something like that? Custom made ribbon microphones? electrostatic microphone with an...

Thanks, all that makes sense. I would just suggest that a sonic boom can have components to it that are not related to the shock waves, such as when a pilot turns on the afterburner, although that probably makes shock waves as well as a hell of a racket. You could probably also tow a noise...

Run that weird propeller plane on liquid oxygen and you'd have one heckuva cool submarine. LOL I've overstayed my welcome on the supersonic propeller issue. LOL You did remind me of my old navy days when I was on a destroyer (USS McCaffery DD860) that attacked positions close to shore in N...

Sorry that link was wrong, here's the correct one: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080001722_2007039252.pdf Wiki is a good starting point, but you have to be careful, like you said. thanks for the very good summary on shock waves. I don't quite get how "Back to shock...