big314mp

As for testing it, the quintessential grade school test for oxygen is to take a burning splint of wood and blow it out so that only an ember remains at the end. Stick the burning end of the splint into a container that you think has pure oxygen. If the splint relights (full on flame, not just get brighter), then you have oxygen. I'm surprised that no one has suggested electrolysis yet. Run an electric current from a battery through salt water, and it will split the water into hydrogen and oxygen. Capture the oxygen in a small tube, then do the above test.

Is this for a demonstration of some sort? If so, what if you used some temperature sensitive ink as a coating on the tube? As the warm water passes, it will heat the tube, causing the ink to change color.

no worries. It was an interesting to chew on though.

clearly I didn't think very far I like i_a's idea, since there are off the shelf devices that will send a text message with their location at certain intervals. A google search will pull up several.

Well, in a nutshell, you need to find the proton concentration and plug that into the formula that kaeroll gave. Have you learned the ICE method? Use that to find the proton concentration.

Am I missing something, because this sounds like a slightly re imagined calutron from the Manhattan project, and that took a long time to produce significant product.

I think we did an experiment like this in high school and found that glucose passed through the dialysis membrane quite easily. I don't know any specifics on the characteristics of the particular dialysis membrane we used though.

This is a fairly straightforward relation, since the tighter an atom holds its own electrons (i.e. the smaller it's radius), the tighter it will grab on to some other atom's electrons (it's electronegativity). I think your equation could be simplified to: r*e = C I have no idea what C would be however.

Didn't NASA do something like this using aerogel to capture solar wind particles in space? If I recall, the premise was that a canister opened, solar particles struck the gel, and were trapped. Eventually the canister was resealed and returned to Earth. Where it smashed into the ground when it's parachute failed to open, but that's neither here nor there. Some sort of moist filter (hepa filter soaked in some sort of media?) attached to a small fan to suck air through the filter should be able to trap bacteria and keep them alive until they get back to the ground. You'd need to find

I think your first issue is that you are (I suspect) using a 32bit operating system, which reads a maximum of just under 4GB. The OS isn't seeing the last stick. However, if you go into the BIOS, it should show all 4 gigs. As to the swap file, its not that big of a deal. Swap files exists to cache data off of ram when the ram gets used up. You have maxed out the ram, so I doubt the swap file is being heavily used. A test you can do, however, is watch the hard disk light when your friend is working. If the hard drive light is constantly on, then the swap file is being used heavily.

A salt water + small amount of electricity combo should corrode the steel quite well. That combo is the bane of coastal boat owners...

The closest you are gonna get to that would be a "hearts and minds" type of campaign to convince the Palestinian public that Israel won't go away, so they might as well learn to get along. Of course, I find that possibility laughably distant, given the current state of the region. And what are we ever going to do with those red faced attackers

The different gravity analogies that you list are all compatible. The object will circle in slowly when it is at a distance. Once it gets close enough, however, the gravitational field (or spacetime curvature if you prefer) changes so quickly that the object becomes shredded. It all depends on how fast the gravitational field strengthens, which is a function of distance to the black hole (among other things, like mass).

This sounds stupid, but what if you take the speed of light and divide it by the planck time? Something like the fastest velocity divided by the shortest time ought to give some sort of "planck acceleration." Or am I just digging a mathematical hole here?

I believe you're thinking of falafel