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rainbowtacos

Last status update:
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Date Signed Up:11/17/2011
Last Login:9/26/2016
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Times Content Favorited:113 times
Total Comments Made:3568
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First2[ 7 ]
First2[ 7 ]
First2[ 7 ]

latest user's comments

#20 - If you're curious about how it works and why  [+] (1 reply) 3 hours ago on Some pre-debate elate +1
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#21 - xef (3 hours ago) [-]
Yeah that's the video I learned about it. Haven't watched it in some years though
#27 - Sure, helium is just the cheapest (probably) and non-volatile,…  [+] (2 replies) 4 hours ago on "Because they're cool"... 0
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#28 - leonhardt (4 hours ago) [-]
So how viable would you say using helium filled zeppelins would be in this day and age?
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#29 - rainbowtacos (3 hours ago) [-]
Compared to what, really? Planes? Planes are fast, zeppelins are slow. There's not really a big need for zeppelins in this day and age because of how much we've refined planes, but in older days they would have been pretty fantastic (if we weren't all scared by the Hindenburg). Zeppelins do have some things going for them, but planes are just all around better nowadays.
#25 - It's actually a common misconception that we're running out of…  [+] (5 replies) 4 hours ago on "Because they're cool"... +1
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#26 - leonhardt (4 hours ago) [-]
Aren't there other lighter than air gasses we could use?
#36 - aajowa (3 hours ago) [-]
Hydrogen and helium are the biggies. Everything else is too expensive, just as flammable as hydrogen without the lift, corrosive as heck or just plain not lifty-enough.


Low pressure steam in an insulated, temperature-controlled bag is novel, but extremely cheap and works (Look up the flying kettle project). An additional up to 13% hydrogen or thereabouts (not sure the exact number) boosts lifting capacity and cannot ignite in any circumstance.
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#27 - rainbowtacos (4 hours ago) [-]
Sure, helium is just the cheapest (probably) and non-volatile, thus very safe. Not a huge reason to use something else until helium becomes more expensive.
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#28 - leonhardt (4 hours ago) [-]
So how viable would you say using helium filled zeppelins would be in this day and age?
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#29 - rainbowtacos (3 hours ago) [-]
Compared to what, really? Planes? Planes are fast, zeppelins are slow. There's not really a big need for zeppelins in this day and age because of how much we've refined planes, but in older days they would have been pretty fantastic (if we weren't all scared by the Hindenburg). Zeppelins do have some things going for them, but planes are just all around better nowadays.
#11 - Spreadsheet, arguably not the best way to do calculus haha.  [+] (1 reply) 09/25/2016 on Curse that math 0
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#12 - notwalkingwaffles (09/26/2016) [-]
Fair enough
#9 - At 48 weeks, there's 0.3 people, so if the question wants a wh…  [+] (6 replies) 09/25/2016 on Curse that math +4
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#29 - cravemate (13 hours ago) [-]
Is it not 50 weeks for everyone to be gone? The initial population is 676 at 0 weeks in, after one week is 650, etc, until the 49th week, where P>0 (P=0.3), and the 50th week P<0 (P= -0.25)
Am I mistaken, or is your initial population at one week in the way you did it? Like P1=676 instead of P0=676?
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#10 - notwalkingwaffles (09/25/2016) [-]
dP/dt=-P^½
Integration[P^-½ dP]=integration[-1 dt]
=2*P^½=c-t
for constant c, giving us
P=1/4*(c-t)^2
at time 0 the curse is uttered:
P(0)=676=1/4*c^2 so c=sqrt(4*676)= 52 weeks
for P=0=1/4(c-t)^2 => c-t=0 => t =c = 52 weeks.

How'd you get 48 and 49?
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#18 - aestriel (21 hours ago) [-]
Ah, but what about births, it is a year long that it would take so i'd likely say a few more children would have been born by then.
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#26 - notwalkingwaffles (16 hours ago) [-]
The rate of change of the tribe is -sqrt(P). That's not just the ones that die, that's total with births incoorporated.
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#11 - rainbowtacos (09/25/2016) [-]
Spreadsheet, arguably not the best way to do calculus haha.
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#12 - notwalkingwaffles (09/26/2016) [-]
Fair enough