Search found 875 matches

by p1t1o
Thu Dec 06, 2018 2:20 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 17
Views: 404

Re: Biology: Wolves vs. Humans

a single bite could be quite serious if it's from a real dog, not a house rat. and dogs have additionally four nasty claws whith which they can bother you while you try to get a hold on their neck. i don't think it's as clear as that. we don't have any natural weapon which could pierce a wolf's ski...
by p1t1o
Thu Dec 06, 2018 10:51 am UTC
Forum: Science
Topic: Serious Chemistry Challenge, but hopefully interesting
Replies: 1
Views: 254

Re: Serious Chemistry Challenge, but hopefully interesting

Seems like this isnt really possible without a Mass-Spec in the loop, we're going with LCMS.
by p1t1o
Wed Dec 05, 2018 4:57 pm UTC
Forum: Science
Topic: Biology: Wolves vs. Humans
Replies: 17
Views: 404

Re: Biology: Wolves vs. Humans

My assumption - Wolves would be very reluctant, even if hungry, to attack an aware foe that outnumbers them, all other factors being equal. Wolves run. Humans walk after them. (https://en.wikipedia.org/wiki/Persistence_hunting) Wolves eventually die of exhaustion. Humans win. PS: "choke out a w...
by p1t1o
Fri Nov 30, 2018 8:59 am UTC
Forum: Science
Topic: To completely prevent any form of Mad Cow Disease?
Replies: 17
Views: 803

Re: To completely prevent any form of Mad Cow Disease?

I only mention it because if BSE is able to persist in the environment ( which it can ) Along with hundreds of other deadly diseases, many of which are live, in your mouth, right this instant. And BSE is hardly the only food borne, cooking resistant, deadly pathogen/substance that sometimes gets fo...
by p1t1o
Wed Nov 28, 2018 2:12 pm UTC
Forum: Science
Topic: Serious Chemistry Challenge, but hopefully interesting
Replies: 1
Views: 254

Serious Chemistry Challenge, but hopefully interesting

I have a liquid. It is Propoxylated Glycerol, 1<n<6.5, CAS# 25791-96-2 Using common NMR, IR and HPLC techniques - or any reasonable variant thereof: Suggest a method that can tell me relative proportions of the different degrees of propoxylation. Eg: 10-20% 1molar propoxylated; 30-50% 2molar propoxy...
by p1t1o
Wed Nov 28, 2018 1:40 pm UTC
Forum: Science
Topic: To completely prevent any form of Mad Cow Disease?
Replies: 17
Views: 803

Re: To completely prevent any form of Mad Cow Disease?

Link appears to be "The Flash vs. Tornado because science" On-topic: well im not sure it is possible to 100.00% "guarantee" protection against *any* infection. Even living in a clean room living on sterilised, artificial nutritionis not a total, philosophical-grade proof against ...
by p1t1o
Tue Nov 20, 2018 12:13 pm UTC
Forum: Science
Topic: Is the universe a black hole? No
Replies: 26
Views: 4293

Re: Is the universe a black hole? No

If Apple made a black hole, it would only attract very specific types of particle, and probably not the same types as most other black holes. It would also be white. But what if our (observed) Universe is a white hole ? White holes are just a rumour leaked by the marketing department to increase hy...
by p1t1o
Thu Nov 01, 2018 4:29 pm UTC
Forum: Science
Topic: Is the universe a black hole? No
Replies: 26
Views: 4293

Re: Is the universe a black hole? No

Yes, that's correct. A black hole is time-space. But if Apple made a black hole, it would be negative space-time. Which brings us back to do. Jose If Apple made a black hole, it would only attract very specific types of particle, and probably not the same types as most other black holes. It would a...
by p1t1o
Thu Nov 01, 2018 4:21 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 119
Views: 21593

Re: Science fleeting thoughts

No (well, apart from gamma being at the other side of the EM spectrum from radio, which was momentarily covered equally badly). But the programme¹ briefly had some sort of "is wifi radiation like nuclear radiation?" pondering but never got around to clarifying that it wasn't . It was a me...
by p1t1o
Wed Oct 31, 2018 4:52 pm UTC
Forum: Science
Topic: Science fleeting thoughts
Replies: 119
Views: 21593

Re: Science fleeting thoughts

There's a link between wifi and atomic radiation??
by p1t1o
Wed Sep 26, 2018 2:57 pm UTC
Forum: Science
Topic: Is the universe a black hole? No
Replies: 26
Views: 4293

Re: Is the universe a black hole? No

Is there any school of thought that says "Look, we currently have very-little-to-no idea what it is like inside a black hole, in physical reality, so the question is unverifiable either way and therefore meaningless." ?
by p1t1o
Wed Sep 26, 2018 12:50 pm UTC
Forum: Science
Topic: Is the universe a black hole? No
Replies: 26
Views: 4293

Is the universe a black hole? No

So you guys know this idea - a black hole with a mass of the universe would have an event horizon roughly the same size as the universe. Or that technically the edge of the observable universe is an event horizon because light cannot escape. Or something. And that this causes some people to think th...
by p1t1o
Tue Sep 25, 2018 3:59 pm UTC
Forum: Science
Topic: Half full or half empty?
Replies: 41
Views: 3654

Re: Half full or half empty?

Zamfir wrote:In other words, water is "full" in the sense that you cannot put more molecules in the empty space between the water molecules - not even small molecules, because water is already rather small.


Tell that to Ice XII :)
by p1t1o
Fri Sep 21, 2018 3:45 pm UTC
Forum: Science
Topic: Half full or half empty?
Replies: 41
Views: 3654

Re: Half full or half empty?

Ice is a solid and is atomic matter. Not sure exactly what you mean. Well as the discussion goes, "matter" consist of mostly empty space. Now lets zoom in on an atom, still mostly empty space. Now lets zoom in on a proton, lo and behold, several sub-particles and a bunch of empty space. S...
by p1t1o
Thu Sep 20, 2018 11:06 am UTC
Forum: Science
Topic: A brief diversion for astronomers
Replies: 6
Views: 1610

Re: A brief diversion for astronomers

I don't know much about astronomy, but decided to give it a try anyway. The stars seem to be about 2.5° to 3° off from the coordinates they had in 2000. (For example, I think the bright star at 17° on the ecliptic is Zeta Piscium , whose celestial longitude in 2000 was about 19.9°.) Since it takes ...
by p1t1o
Thu Sep 20, 2018 10:56 am UTC
Forum: Science
Topic: Half full or half empty?
Replies: 41
Views: 3654

Re: Half full or half empty?

If the definition of "full" is "solid with atomic matter"

Then good luck finding any volume within the universe that is "full".

I mean seriously, can we even say that about a lone proton?
by p1t1o
Tue Aug 21, 2018 2:39 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

The short answer is - yes, a large amount of energy (no matter the form) dumped into a small volume of air will indeed resemble a nuclear explosion. The exact mechanisms of energy propagation will differ, but the gross end result will be the same - thermal flash, plasma fireball, shockwave and a mu...
by p1t1o
Fri Aug 17, 2018 7:59 am UTC
Forum: Science
Topic: Gravitation 'Beach'
Replies: 11
Views: 1820

Re: Gravitation 'Beach'

An ocean wave can be made to change speed, and when it does so, its amplitude changes. I dont think a gravity wave can travel at anything but c?
by p1t1o
Wed Aug 15, 2018 1:39 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

The short answer is - yes, a large amount of energy (no matter the form) dumped into a small volume of air will indeed resemble a nuclear explosion. The exact mechanisms of energy propagation will differ, but the gross end result will be the same - thermal flash, plasma fireball, shockwave and a mus...
by p1t1o
Tue Jul 17, 2018 1:36 pm UTC
Forum: Science
Topic: Consequences of climate change
Replies: 80
Views: 16000

Re: Consequences of climate change

I think I vaguely recall something about the global temperature increase causing expansion of the atmosphere, which would have a real (but minor) impact on LEO satellites. And something about when very large masses of ice melt, or shift, the crust underneath can "relax" a bit, changing top...
by p1t1o
Mon Jul 16, 2018 8:19 am UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 3396

Re: Cooling gas by expansion

Actually I dont want stealth, Im trying to falsify the hypothesis that the "hydrogen steamer" space-stealth design can work. Because if it does everything it says on the tin, its pretty damn stealthy. And if it stands up to all the questions I can think to put to it, then I can consider it...
by p1t1o
Wed Jun 13, 2018 5:09 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

Soupspoon wrote:What if I paint the door onto a brick wall? Will it work the same as painting a tunnel onto a rock wall?


These appear to be opposite cases, only one of them will resemble the previous example.
by p1t1o
Wed Jun 13, 2018 3:46 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

I was concentrating on the fate of the weapon but you are right of course. Bullet will already be moving and there only one way to stop it.
by p1t1o
Wed Jun 13, 2018 3:33 pm UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

In high-energy environments, flesh can be approximated with water. If you block the barrel of a gun with just a few inches of water, there is a good chance of barrel rupture - plenty of empirical evidence for this on youtube. Ergo, an arm/finger in the barrel will certainly get smashed to poop, but ...
by p1t1o
Fri Jun 08, 2018 10:20 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

Luke Cage. He is bulletproof , for some reason. Judging by the sound-effects, bullets bounced rather than splashing. It's very silly. Because Science did a thing about it and someone was questioning his maths, so I checked out the maths too and ... like I said, Kyle pulled those numbers out of his ...
by p1t1o
Fri Jun 08, 2018 8:11 am UTC
Forum: Science
Topic: Science-based what-if questions
Replies: 622
Views: 98587

Re: Science-based what-if questions

Would the bullet just splash ? Well i mean that is a video of a bullet doing exactly that... In ballistics, this is called "Interface Defeat" - where the difference in strengths/hardness overcomes the relationship between velocity, mass and impact depth. Very high accelerations can be obs...
by p1t1o
Fri Jun 01, 2018 3:44 pm UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 3396

Re: Cooling gas by expansion

Does this concept have any bearing on the subject? https://en.wikipedia.org/wiki/Free_expansion Here it states that free expansion into a vacuum is isothermal, no temperature change. However it also states that no work must be done by the expansion - although the "work" they refer to is pu...
by p1t1o
Thu May 31, 2018 6:49 pm UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 3396

Re: Cooling gas by expansion

thoughtfully wrote:Describing all black-body emissions as "IR" is confusing, but it's a common enough mistake.


Well we aren't going to be looking for these things with radio telescopes, but I see your point ;)

Wait, or are we?

Probably a discussion for another thread.
by p1t1o
Thu May 31, 2018 5:09 pm UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 3396

Re: Cooling gas by expansion

Temperature as a concept doesn't work too well in a gas with zero pressure. You should be able to cool the ship though. Aerosol cans will lose heat while spraying into open air, and I don't think the ambient pressure is making a strong contribution. Can't make a strong argument/reference for that o...
by p1t1o
Thu May 31, 2018 3:38 pm UTC
Forum: Science
Topic: Cooling gas by expansion
Replies: 17
Views: 3396

Cooling gas by expansion

So I have a compressed gas in a tank. 1) I release it through a nozzle into an infinite vacuum, like say, space. Does the gas cool to absolute zero due to infinite expansion, or is there some limit to cooling? Does the mean-free-path have anything to do with this? 2) Same question but this time the ...
by p1t1o
Thu May 31, 2018 10:22 am UTC
Forum: Science
Topic: Deep Drill Industry
Replies: 17
Views: 3578

Re: Deep Drill Industry

For what its worth, global Osmium production is (according to https://mmta.co.uk/metals/os/) less than 100kg/yr Thats still a collosal amount of water to process, but then Osmium is one of the rarer elements in seawater. Its one of the rarest on the planet. I dont think Osmium is a great measure of ...
by p1t1o
Wed May 30, 2018 2:10 pm UTC
Forum: Science
Topic: How much is 1e340 j of energy?
Replies: 19
Views: 3281

Re: How much is 1e340 j of energy?

So if you did bring 1e340J into being somehow, how would you describe the predicted effects? Is it a large small enough number that "collapse to a singularity" or "complete destruction of the universe" are reasonable choices? Or is the number so large as to make even those simpli...
by p1t1o
Tue May 29, 2018 11:16 am UTC
Forum: Science
Topic: Deep Drill Industry
Replies: 17
Views: 3578

Re: Deep Drill Industry

On a more practical level, I now wonder about the inland Ivory Coast and Burkina Faso-ish geology. I must check some topological and geological maps! (Then narrow down which, maybe Russian, location might be near that lone Eurasian purple pixel.) Looks like that purple spot is practically right und...
by p1t1o
Tue May 29, 2018 10:28 am UTC
Forum: Science
Topic: How much is 1e340 j of energy?
Replies: 19
Views: 3281

Re: How much is 1e340 j of energy?

For example, Graham's number (Googolplex is sooo 1995) is so large it makes 1e340 look like...well its very much larger, there are not enough words to explain how big it is other than the mathematical notation... You think that's big? How about a googleplex to the Graham's number power, factorial, ...
by p1t1o
Mon May 28, 2018 4:33 pm UTC
Forum: Science
Topic: Deep Drill Industry
Replies: 17
Views: 3578

Re: Deep Drill Industry

It is going to be a very long time before "get it from space" becomes the cheapest/easiest option for anything.

Not when there are gigatons of almost every element dissolved in the oceans just sitting right on the surface of the Earth.
by p1t1o
Mon May 28, 2018 4:19 pm UTC
Forum: Science
Topic: How much is 1e340 j of energy?
Replies: 19
Views: 3281

Re: How much is 1e340 j of energy?

The Tsar Bomba is the biggest nuclear bomb ever built. It was 50 megatons, and (thus) put out 209200000000000000 joules (2 x 10 17 joules), but couldn't sustain the reaction for more than a fraction of a second. (It was enough). A watt is a joule per second , so the total power output of the bomb i...
by p1t1o
Thu May 10, 2018 11:15 am UTC
Forum: Science
Topic: Relative Light Speed
Replies: 15
Views: 3905

Re: Relative Light Speed

I thought string theory was still "up in the air"?

And arent the loops particles rather than spacetime itself?
by p1t1o
Fri May 04, 2018 4:00 pm UTC
Forum: Science
Topic: neutrino question
Replies: 18
Views: 3428

Re: neutrino question

Im not happy with Honestly, if you won't understand any answer that's got too much quantum in it, you're going to have to settle for remaining not happy with the explanations given. Oh I can accept it, its only one of several mind-bending things that I have heard happen in the quantum world, but I ...
by p1t1o
Fri May 04, 2018 2:40 pm UTC
Forum: Science
Topic: Quick Burning Paper
Replies: 47
Views: 6768

Re: Quick Burning Paper

C4 is reasonably stable (it can’t be detonated accidentally). Just carve whatever you want to be private into a block of it, and set it up to detonate if somebody comes a-snoopin. In fact, I bet you could roll it out into sheets (thicker than paper) and print onto them... I only mentioned war and p...

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