Search found 819 matches

by p1t1o
Thu Mar 22, 2018 4:53 pm UTC
Forum: Science
Topic: Free floating "gas dwarf"?
Replies: 8
Views: 663

Re: Free floating "gas dwarf"?

Considering that the surface of Venus is already far too hot and pressurized for habitation, I don't think habitability questions really depend on whether there's a solid core or not. The habitable zone is going to be up somewhere near the top of the atmosphere regardless. Ah, good point. So we'd b...
by p1t1o
Thu Mar 22, 2018 4:21 pm UTC
Forum: Science
Topic: Free floating "gas dwarf"?
Replies: 8
Views: 663

Free floating "gas dwarf"?

So i just (re)read https://what-if.xkcd.com/99/ Could we build a stable ball of gas in space? (lets say, orbiting the sun somewhere between Earth and Mars, or at 1AU at one of the lagrange points) A ball whose own gravity prevents it from dissipating, but small enough that it all remains gaseous - n...
by p1t1o
Mon Mar 19, 2018 4:35 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 110
Views: 5921

Re: Quantum Question

No. Imagine a universe in a box which (ignoring gravity) is at maximum entropy. It's basically a big, homogeneous gas at thermal equilibrium. If you pick out a particle at random, it will have random properties. That doesn't give you any information at all. Except that if the universe is a homogeno...
by p1t1o
Mon Mar 19, 2018 11:27 am UTC
Forum: Science
Topic: Quantum Question
Replies: 110
Views: 5921

Re: Quantum Question

Someone correct me if Im wrong, but: If there is an entity present capable of observing a particle, you are not in a maximum-entropy-state universe. If you're in a minimum-entropy-state universe, there are no particles to look at...yet. So the answer is either: yes, you can tell, or; the question do...
by p1t1o
Thu Mar 15, 2018 2:05 pm UTC
Forum: Science
Topic: Quantum Question
Replies: 110
Views: 5921

Re: Quantum Question

Entanglement is not actually spooky. Einstein described it that way, but Einstein is not correct. There are no violations of special relativity or causality in quantum mechanics. If you instead wanted to model what is happening with a backwards propagating super determining, the violence you have d...
by p1t1o
Thu Mar 15, 2018 1:57 pm UTC
Forum: Science
Topic: Delicious Martian Salt
Replies: 10
Views: 766

Re: Delicious Martian Salt

Well short of finding a seam of rock salt, it will be more difficult than its worth. If its nutrition that is the worry, then it doesnt need to be in the form of "table salt", just sodium and chloride contained in various foods. Thats probably the best way to get dietary salt on mars - gro...
by p1t1o
Thu Mar 15, 2018 9:42 am UTC
Forum: Science
Topic: Delicious Martian Salt
Replies: 10
Views: 766

Re: Delicious Martian Salt

Do you mean "from martian raw materials" or do you mean what would you have to take with you? Or, do you just mean in general?
by p1t1o
Fri Mar 09, 2018 4:50 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Complete Solid Object

Maybe this would be really close to this theoretically completely solid object... Collect a sample of pure neutrons, chill to absolute zero, and place them under extreme pressure to pack them all together as closely as possible. Whaddy'all think? :) If you're still talking neutrons, theres plenty o...
by p1t1o
Fri Mar 09, 2018 2:32 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

andykhang wrote:Of course it ain't. That thing is more closer to a singularity than any definition of matter applicable to us. And thing start to get weird even near a singularity, not to mention touching it.


Name one similarity between a singularity and this force-object?
by p1t1o
Fri Mar 09, 2018 9:23 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

Matter is one thing this object certainly is not. *** On a related note, in Alastair Reynold's "Revelation Space" series of books, the BigBad is an alien machine race that is composed of replicating cubes of "pure force" with a description closely matching this object - no partic...
by p1t1o
Tue Mar 06, 2018 9:01 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

On the other hand, it may be incapable of radiating away heat, and without discrete particles it may not conduct heat very well either. Temperature is a measure of the external/internal kinetic energy of the particles within a system, with only one particle this changes things dramatically. What hap...
by p1t1o
Mon Mar 05, 2018 4:12 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Complete Solid Object

Supposed they're exist a Complete Solid Object: An object that you will find no gap, no matter if you zoom it down infinitely, and is completely take up the space in it fully 100% while still obeying the law of the universe aside from the property above. What would it like (probably the same as any...
by p1t1o
Mon Feb 19, 2018 4:17 pm UTC
Forum: Science
Topic: What are 10 future out of the box technologies/inventions
Replies: 8
Views: 2140

Re: What are 10 future out of the box technologies/inventions

Movies, TV shows and music that support mods to the extent that some PC games do. I have been known to go very mod-heavy with certain games and this idea blows my mind. "Hey, you watching Game of Thrones?" "Yeah, you got the StarWars mod?" "Nah, just vanilla, Im a purist.&q...
by p1t1o
Mon Feb 12, 2018 7:58 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

It also of course depends on how fast you're releasing that energy. Sure, 100TW is a lot, but I never specified that it was a gram per second. Do it slow enough and it won't be slagging anything. Naturally. I did combine some assumptions for the sake of argument ;) It certainly wouldnt be much of a...
by p1t1o
Mon Feb 12, 2018 2:17 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

I feel like even in LEO, pumping that much energy into the atmosphere would make something happen that would provide more impulse to the shuttle than 12 m/s. Hmmm...I doubt it. If we are talking the equivalent of a Hiroshima detonation every second: depending on the frequency of the beam, the energ...
by p1t1o
Fri Feb 09, 2018 3:32 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

The momentum of light is E/c. Force is dp/dt, or power/c. If you want your weight to be supported by the light, you need a power of weight*c. So under a terawatt, actually. This is with only one coffee in me though, don't hold me to it. You got it, project rho confirms. It works out to about 300MW ...
by p1t1o
Tue Feb 06, 2018 1:52 pm UTC
Forum: Science
Topic: Expansion in the long... (very) long term
Replies: 9
Views: 1000

Re: Expansion in the long... (very) long term

If space keeps expanding then yes, our "local bubble" will get smaller and smaller until eventually it only contains the milky way, and then eventually only the solar system...but it doesnt stop. If the future of our universe contains a big rip, then it'll be very far in the future, based...
by p1t1o
Tue Feb 06, 2018 9:01 am UTC
Forum: Science
Topic: Expansion in the long... (very) long term
Replies: 9
Views: 1000

Re: Expansion in the long... (very) long term

If space keeps expanding then yes, our "local bubble" will get smaller and smaller until eventually it only contains the milky way, and then eventually only the solar system...but it doesnt stop. If the hypothesis pans out and certain constants are certain values, then the expansion will k...
by p1t1o
Thu Feb 01, 2018 5:53 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

I presume that there will be a frame-dragging effect as it passes as well, that ought to have some impact on Earth's fabric as well, yes? Given that the total gravitational binding energy of the Earth is 1 ten-thousand-billionth of the energy of this electron, I would wager that if there is any inte...
by p1t1o
Thu Feb 01, 2018 11:47 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

But from the Earths perspective, the electron take about a twentieth of a second to pass through, and while it does, it is under the influence of a solar mass worth of gravity at very close proximity.

So there is some scope for interaction, no?
by p1t1o
Wed Jan 31, 2018 2:46 pm UTC
Forum: Science
Topic: Explosives As A Reflective Wall
Replies: 12
Views: 1230

Re: Explosives As A Reflective Wall

Originally it was a thrown satchel that did damage in a circle but it was hard to throw or plant the satchel far enough away without getting hurt. That's when we started asking about how to make the bomb deal more damage in one direction, like a claymores. Then I made the guess that a smart enough ...
by p1t1o
Wed Jan 31, 2018 8:56 am UTC
Forum: Science
Topic: Explosives As A Reflective Wall
Replies: 12
Views: 1230

Re: Explosives As A Reflective Wall

You can take measures to change this, but eventually you start constructing a gun. This whole post was awesome. Hmm, I googled most of these, and I think we could construct a directional bomb pretty easily with a moderate skill roll. However, I still think my initial ruling was wrong, or at least m...
by p1t1o
Tue Jan 30, 2018 2:42 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

I dont think science knows all that much about single electrons with a solar mass of kinetic energy...

But I was thinking more about BH's and how there are only specific solutions available.
by p1t1o
Tue Jan 30, 2018 2:19 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Single Electron Disaster

What happen if you concentrate all the energy the Sun have to accelerate a single electron? Would it become a black hole traveling at near-light speed? It wouldnt form a black hole because its not gaining "real" mass (if you were co-moving with it, its mass would not appear to increase, s...
by p1t1o
Tue Jan 30, 2018 12:38 pm UTC
Forum: Science
Topic: Explosives As A Reflective Wall
Replies: 12
Views: 1230

Re: Explosives As A Reflective Wall

You can indeed focus explosive power in many different ways, shockwaves behave much like any other wave, with constructive/destructive interference, diffraction and reflection, resonance effects, propagation rates etc. The detonation wave that moves through the body of the explosive itself is also u...
by p1t1o
Fri Jan 26, 2018 4:06 pm UTC
Forum: Science
Topic: Why do Chameleons Not Use Camoufloge?
Replies: 23
Views: 1708

Re: Why do Chameleons Not Use Camoufloge?

I agree with you, but the problems is that was not what I was told. Again and again we were explicitly told that it was not used for camouflage and were only used for communication. Its not that unusual. Science advances, but the advances are not communicated quickly, so you have more than one grou...
by p1t1o
Thu Jan 25, 2018 4:02 pm UTC
Forum: Science
Topic: Why do Chameleons Not Use Camoufloge?
Replies: 23
Views: 1708

Re: Why do Chameleons Not Use Camoufloge?

Izawwlgood wrote:
Zohar wrote:...all I can come up with is somethingsomething your mom?


Mines really good and ends with "...come here lion!"

Wish I knew how the start went...
by p1t1o
Wed Jan 24, 2018 9:13 am UTC
Forum: Science
Topic: Why do Chameleons Not Use Camoufloge?
Replies: 23
Views: 1708

Re: Why do Chameleons Not Use Camoufloge?

Do Chameleons suffer much from predation? Perhaps they have little need for camoflage.

I have also heard that the way that the degree to which they can become motionless camoflages them from their prey (insects).
by p1t1o
Mon Jan 22, 2018 3:14 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

Yeah...so this design is kinda like the Yamato or the Bismacrk: A thing built mostly for propaganda, only for it to work too well and sunk too early to do any significant damage. Only that this thing is even less realistic lol (Seriously, it somehow is better as a kind of mobile marine artillery th...
by p1t1o
Mon Jan 22, 2018 3:13 pm UTC
Forum: Science
Topic: Round-barrel(-ish) Railgun
Replies: 13
Views: 916

Re: Round-barrel(-ish) Railgun

Honestly its way too soon to be saying what is in the projectiles. Railguns are still highly experimental and an operational weapon could be very different. The projectile will be as experimental as the weapon at this point. Its interesting, a railgun projectile has to conduct the entire firing char...
by p1t1o
Mon Jan 22, 2018 2:43 pm UTC
Forum: Science
Topic: Round-barrel(-ish) Railgun
Replies: 13
Views: 916

Re: Round-barrel(-ish) Railgun

Yeah, too bad...with all the craft relying on missile for their primary fire, all you need is a well placed kinetic kill weapon too fast and too heavy for the missle to react against. (Applied for warship only, I think) Dont underestimate missiles, they are ballistic projectiles just like gun round...
by p1t1o
Mon Jan 22, 2018 12:06 pm UTC
Forum: Science
Topic: Round-barrel(-ish) Railgun
Replies: 13
Views: 916

Re: Round-barrel(-ish) Railgun

The electricity itself is also split between the rails though, so the only problem I see right now is how to time the discharge rather than make it faster than in the long version though. What I was getting at, to obtain a certain muzzle velocity, shortening the barrel means the switching must occu...
by p1t1o
Mon Jan 22, 2018 9:04 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

I think, long story short: Giant railguns do not equal giant war fighting capability and are probably inferior to a battery of smaller weapons. Look at the Tsar Bomba: Biggest nuke in the world. No delivery system powerful enough to deploy it. Much greater destruction can be wrought with a group of ...
by p1t1o
Fri Jan 19, 2018 6:42 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Science-based what-if questions

So I calculate the kinetic energy of this thing to be about 420 million Joules in the bullet upon firing. With that much energy, how long is it range, supposedly I aim it at sea-level? At sea-level? Surprisingly low. One needs more data in order to take an appropriate guess, but due to the thicknes...
by p1t1o
Fri Jan 19, 2018 4:46 pm UTC
Forum: Science
Topic: Round-barrel(-ish) Railgun
Replies: 13
Views: 916

Re: Round-barrel(-ish) Railgun

You can't really be lighter with these kind of thing anyway, since a rail need a certain level of size and weight to withstand such force. You could be significantly shorter though, by splitting the load between multiple shorter rail (though I guess you still need some revolutionary engineering to ...
by p1t1o
Fri Jan 19, 2018 4:32 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 590
Views: 60697

Re: Lancer-class Railgun Destroyer (self-named)

So, with the railgun finally somewhat ready for practical used, and soon to be put on a battleship, soon enough there're going to be some crazy design surrounding this (prefertively the Japanese, but they put all their crazies in their culture nowaday), so I thought I would suggest one such design ...
by p1t1o
Fri Jan 19, 2018 4:19 pm UTC
Forum: Science
Topic: Round-barrel(-ish) Railgun
Replies: 13
Views: 916

Re: Round-barrel(-ish) Railgun

You could save alot of space by just splitiing the rail and place it in circular fashion though. IIRC, rail size doesn't matter much aside from durability Im not a huge buff on electronics so the mathematical details escape me, but the voltages, currents and forces are very high - for example, enor...
by p1t1o
Fri Jan 19, 2018 2:53 pm UTC
Forum: Science
Topic: Round-barrel(-ish) Railgun
Replies: 13
Views: 916

Re: Round-barrel(-ish) Railgun

A railgun is called a railgun exactly because the "barrel" consists of two "rails" between which a large voltage is applied. Electromagnetic effects cause a large force to appear when this is allowed to discharge through the projectile. Or something. Ergo, there is no calculation...
by p1t1o
Thu Jan 11, 2018 11:05 am UTC
Forum: Science
Topic: Sugar and Vitamin/Mineral Absorption
Replies: 8
Views: 1137

Re: Sugar and Vitamin/Mineral Absorption

Here's a good way to refute it: To be honest, that passage is so full of crap, I wouldnt bother trying to distill science from the rest of the text, its clearly written by someone whose motive was NOT to spread science and knowledge. The passage is a showcase of pseudoscience red flags, mixed in wit...
by p1t1o
Wed Jan 10, 2018 10:36 am UTC
Forum: Science
Topic: Multipath Crazy Straw
Replies: 24
Views: 2438

Re: Multipath Crazy Straw

All I can think about when I see the title of this thread:

Image

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