/sci/ - Science & Math

>>1459991
s'true, both flow in similar ways, you just are used to seeing liquids, but gases behave in many similar ways. compressability is one way in which they differ.

I like he spends some time talking about how /co/ is important to improving the morality of humanity.

Remember that episode, good times. Poor happy, stupid bruce.

I feel like this is a common problem for me, any time i can understand a problem well enough for me to describe it to someone else for help, i don't need any dang help.

>>1161518
The idea is that we've got particle flux on B, some number of ions a second (ib) and then by turning up the potential from A we increase the potential on B to reduce ib. we can measure A and V, and i need to find ib and vb.

bumping for helpful electrical engineer.

I don't have a dedicated circuit diagram software, i cobbled that together in photoshop, yes, they're resistors.

so, at b is a some potential and a current source (a plasma, but not relevant right now) at point a is a power source, putting on a potential of it's own (it's what's causing the potential at b, but it's a different potential)

V is (for the sake of assumptions) a perfect voltmeter.

My Professor wants me to replicate his math regarding finding the Voltage and Current at B given our measurements of voltage at A and V. But I'm pretty shoddy at circuits, i know what kirchoffs rules are, but i've got negligible experience at implementing them. I need help.

Ok, so, i'm having trouble with this circuit. I need to understand what i've got here and i've not had a decent circuits course yet as it's a fourth year course for physics majors, and i'm starting that in the fall.

does anybody feel like they've got the cojones to help me out here?

>>1158562
but incident flux tends to attract conductors, or at least cause a kind of drag, that should just make it fall into earth sooner.

>>1158520
an entire paper? so i take it you don't have a good explanation yourself? and amongst the first line it reminds me of another thing, the things flowing the magnetosphere, the magnetic flux on this thing must be pretty impressive, if it conducts at all that's gonna be one hell of an EMF.

I think it's important to think about why you do things, but i don't think it's rigorous enough to make it the entirety of your career, save being a teacher. it should be more of a universal hobby, like literature or politics. Something everybody should do a little of.

>>1158413
>>1158382
One thing i've never understood about rotovators is how the hell do they actually do any work?

a fully tethered space elevator makes sense, it steels rotational kinetic energy from the earth and turns it into potential energy of the object you're pulling up.

But the rotovator isn't attached to anything. anytime you lift something up with it, you'll the rotor down. i suppose you could use ion rockets as position maintenance, which would be more efficient than chemical rockets, but still, it's not as sound an idea to my mind. Someone care to explain it?

>>1158256
It's like freaking power rangers in space. The super heavy was just 5 falcon 9's strapped together, but i think they decided against developing that tech.

"What's he doing captain?"
"looks like he's trying to have a conversation about space cultures in /sci/"
"That dumb fucker"

doing what brings you joy well will inevitably get you paid. take some of low level classes and see which ones really gel with you. Try to take a few meals with your class mates as well, and see what kind of cultures really apeal to you. I started out doing both chem and physics, but between the inquisitive undertone of physics and the general joy of the quest for knowledge shared by the students I drifted towards plasma physics, straight up.

bumpin-behossafat!

Does anyone know enough about stellar system formation to contribute to this hypothesis?

Given: a ship with interstellar capacity, and no assurance that there would be an earth like world on the end of the trip.

Wouldn't it be a safer bet that there'd be plenty of asteroids and rocky bodies lined with metals? comets with volatiles? wouldn't it be easier to build space habitats than terraform a planet or inhabit a larger gravity well? If we continue to ship around meat in a can, in the super long haul, wouldn't we evolve to be more or less a null-g species, save for our great ancestors on terra firma?

I was browsing about, looking up lunar mining of volatiles in the solar wind, and there was exactly a page i was interested in.

http://www.moonminer.com/Basic-Chemistry-for-Moon-Miners.html

apparently the university of wisconsin's had plans for a lunar regolith miner and processor on the books for the last 2 decades.

We've got a whole crap ton of plans in place for whenever any of this shit gets remotely feasible. The future is an interesting place to live.

>>1157888
the likely situation is a government would pay a company to go there.

I've been thinking about methods of for larger scale space industries.

It would be a two staged approach, get into some orbit, whatever orbits easiest, presumably lower orbit's are easier, but I've never played around with orbital mechanics quantitatively this would be done with the chemical rockets we know and die on.

From there you use plasma rockets or ion drives to maneuver into higher orbits much more efficiently, you'd use space tugs that are never intended to enter earths atmosphere for this, so it sort of presumes a period of crappier space travel (like we're entering now)

>>1131870
I don't like to brag, I let other people do it for me.

>>1131840
and by that, he means the perception of temperatures for humans is a fully neurological process, and thanks to cephalization, all the consciousness is located in your cranium.

>>1131804
and evaporation is a constant process, the air near your skin will reach carrying capacity quickly and then slowly diffuse from there. However, when you have a fan going, the air will constantly be replaced with air that has less moisture in it. In this case a fan would be less effective in a very moist environment, but likely not useless.

Oh, the 15 minute thing is assuming you've got a honking stationary freezer, in a dorm fridge it took hours. 14 hours seemed to be a sweet spot for me, that was what i recorded.