Recent content by magic9mushroo

I know that linoleic acid and alpha-linolenic acid are essential fatty acids for human life. What I don't know is when, exactly, you'd die from not having them, and precisely what would give out. So, assuming a healthy person suddenly switched to a diet with zero fat (I know this isn't actually...

I know R4N+ is a quaternary ammonium, R2C=N+R2 is an iminium, and R-C≡N+-R is a nitrilium, but what is an R2C=N+=CR2 cation called?

I am aware that answers will vary with parameters. That is why I gave the mass of the brown dwarf and the approximate mass of the primary. I am also aware that dense bodies can accrete matter from giant stars' expanded envelopes, but was unsure if a brown dwarf (being significantly less dense...

(I honestly don't know whether this is Intermediate or Advanced. I'm guessing the latter since I don't know the answers and I've done second year astrophysics, but maybe I'm just an idiot.) Let's say you've got a high mass (~60 Jupiter masses) brown dwarf in relatively close orbit around a true...

That depends on the draw weight. There isn't really a limit on how stiff you can make the prods, after all. I was trying to work out if you could build a 10 ton draw-weight crossbow.

So is Zylon usable as rope/flexible string?

Strongest crossbow string, basically.

By "bendable" I mean "you can run it through a pulley and it retains tension", and by "strong" I refer to tensile yield strength. Thanks in advance.

So basically, you're saying that the angle the air comes off the wing is less than the angle it comes on, by more than the pitch angle? I suppose I can accept that (it's converting the kinetic energy of the air into its own KE, yes?)... but it depends on forward speed to generate the large DC...

How does pushing air upwards through a rotor that's rotating to push air downwards speed it up? Pushing air upwards pushes on the underside of the blades and thus against the spin.

So basically, the rotor is just being used as a parachute? It has a negative angle of attack and if spun that way while stationary would pull the gyroplane down into the ground?

I understand how an aeroplane works, with the wings deflecting air downward and thus creating a lift force. I understand how a helicopter works, with the rotor pushing air downward and thus creating a lift force. However, I do not understand how gyroplanes, with a backward-tilted unpowered...

Same intensity =/= same number of photons. Same intensity = same total energy. So, your body absorbs IR more than UV, and thus is heated more by the IR than the UV. There is no issue here. (If, on the other hand, it absorbed more UV than IR, it would be heated more by the UV.)

Oh, sure. I just thought it was worth mentioning that the most luminous objects in the universe are black hole accretion, since there were some in this thread doubting the ability of black holes to accrete.

Well, IIRC active galactic nuclei are assumed to be due to supermassive black hole accretion.