Recent content by alpha372

While humans can take 1g and 0g with ease separately, whether they can take a 75% toe-to-head gradient is a different issue. A couple of studies (1[/color] and 2[/color]) indicate artificial gravity gradient should not exceed 8% per meter ("optimal"). A later study3[/color] gives a significantly...

Thanks, this is all interesting stuff (next time show your work! hehe). I also assumed that being in a space suit was a given... I didn't even think about the possibility that it might actually have an atmosphere (the thing is so small).

To answer my own question directly, and save everyone some time from trying to explain what doesn't need to be explained (i.e, I don't care about how things look on a graph; I wanted to know the error in the logic, which has been pointed out several times already anyway) the problem is, I'd...

Thanks! I was too lazy to do the calculation myself!

How would you prove that sqrt(-4) is not a number? I argue that it is in fact a number -- a complex number to be exact. Complex numbers are a subset of what we call, "numbers", therefore, I find your statement, "Plus sqrt(-4) is not a number. It's more of an expression." to be false.

The top half is very helpful to my issue- thanks, I'm making a note of it. The bottom half was irrelevant to the question.

You didn't really understand what I was asking.

Thanks!

I didn't ask if you thought it needed a proof. I asked how it could be done.

LOL. Sorry, I didn't mean to get on your defensive side, lol. Thanks for the laugh. About the whole, "anything can happen" in quantum mechanics world; I prefer to stick to the ordinary. And in ordinary circumstances, we would have to wait a really long long time for such a "just happened...

How would you go about proving that sqrt(-4) is not a real number?

Homework Statement I know that the square root of a negative number is not a real number, but I can't remember the logic that gets to that. Homework Equations The Attempt at a Solution I've read, "the square root of (-4) is not a real number because there is no real number you can...

I guess what I meant by star was that it had to be something between a white dwarf and neutron star because of it's density. I think most white dwarfs could be considered too hot to walk on, right? My logic is that the density of this thing is around 10^11, and practically all elements that...

Yes, I want a "small planet" or thing, to be naturally occurring; I want the universe to be able to construct it; not humans or "divine" intervention. 20 meters isn't a bad size though... The basic idea is that it be small so that you could tell by walking that you were going around something...

You're right-- I didn't carefully consider the definition of a planet. Thanks for pointing this out. I should have said something along the lines of "object in space cool enough to walk on. " And for simplicity, I'd like to first assume that this object is pretty much uniform in density. But I...