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Messages - Madidus_Scientia

Pages: [1] 2 3 ... 58
1
The Environment / How can two weather systems merge?
« on: 30/10/2012 07:15:51 »
They are saying hurricane Sandy merged with another storm system? How does this happen, if they are both spinning the same direction, wouldn't they cancel each other out rather than add to each other?

2
I was attempting to explain to a friend what Higgs Bosons are and what the Large Hadron Collider does to a friend, who seemed completely satisfied with my explanations apart from one thing - he wants to know how they get an atom or a group of atoms by themselves to inject into the collider. Do they know exactly how many atoms they have?

Am I correct in thinking they must be ions otherwise the magnets couldn't accelerate them? If so do they repel/attract each other in transit?

3
Just Chat ! / Re: sorry for teh problems
« on: 27/12/2011 06:46:03 »
Oh, right you are RD

4
Am I correct in rephrasing your question this way:

Does an 02 molecule and 2 hydrogen atoms create more energy when combusted than a single Oxygen atom combusted with 2 Hydrogen atoms?

?

5
But from experience I always seem to dry faster after a cold one.

If you're having a cold shower, it might be that the ambient temperature is hotter, aiding evaporation. And you might even have fans going as well. If you're having a hotter shower, it might be cooler weather, probably without any fans on. 

6
Just Chat ! / Re: sorry for teh problems
« on: 26/12/2011 05:22:21 »
Previously, there was a category for "My Posts" that which was nice, but perhaps not vital.  It was nice to see which of one's posts had been commented on.

I second this, I would say it perhaps is vital

7
Just Chat ! / Re: Theist, Agnostic or Atheist?
« on: 25/12/2011 12:12:58 »
However, I do believe it is important to have a religion.  Your religion defines your basic ethical system that defines how you limit your own actions in relation to others and the planet where we live.

Then you are surrendering your own thoughts about how we should treat each other to the teachings of your religion. You say it defines your ethical system, why is this important? Is it more important to have a defined ethical system than a good ethical system? You say you don't believe in god, and so must know that religion is man made. Why would you think that bronze age men knew best how run a society?


8
Just Chat ! / What is the meaning of life?
« on: 24/11/2011 23:34:30 »
I've always disliked the question. Firstly it's a loaded question, it assumes there is a meaning, secondly, it's too vague. What does one mean by meaning, do they mean purpose? What does one mean by life? Human life? All life?

It has no answer because the question is wrong.

Apart from 42 of course.

9
Ocean acidification.

10
Yep, proper coffee!

11
No, I think that's a variation on the gamblers fallacy en.m.wikipedia.org/wiki/Gambler's_fallacy

It's not. Unless they are cheating, gamblers can't influence an outcome. Those who turn on a cell phone in an aircraft, whether they like it or not, are absolutely influencing an outcome.

I meant all other things equal, without making the assumptions that frequent flyers are more likely to use electronic devices, and that electronic devices could cause the plane to crash.

Maybe we should turn off all the electronic devices in the cockpit so that they don't interfere with themselves, especially the radio.

It must be hard for people with pacemakers to get around avoiding everyone who has a mobile phone so that it doesn't kill them.

I wonder how many terrorists have tried and failed to crash a plane by leaving their phone on.

Clifford,

You might be quite right to get upset if your car conked out due to RFI. If the aeroplane in which you were flying conked out due to RFI, your upset might only be temporary.

Under what circumstances is it acceptable for one passenger to deliberately do anything that increases the risk of a catastrophic failure that might kill all of his, or her, fellow passengers?

Yeah, we should ask passengers if they've seen a black cat or walked under a ladder recently before they board as well.

12
No, I think that's a variation on the gamblers fallacy en.m.wikipedia.org/wiki/Gambler's_fallacy

13
Eyebrows evolved as a way to display ones prowess at not passing out and letting your mates shave them off. A specimen with only 1 or less eyebrows may be considered weaker than the rest of the tribe.

14
Hahahah i'm going to use that. Well, I need a wife first though

15
Chemistry / Re: Is fluoride in drinking water harmful?
« on: 02/06/2011 07:51:37 »
Fluoride only accumulates in bones, which I believe is the point.

16
General Science / How can we be surprised by dreams?
« on: 01/06/2011 15:59:55 »
Because you're not consciously creating the dialogue, your experience is from your point of view.

lotta answers to sci problems have come thru dreams?= its a reconfiguration of the braindata
Like what?

17
It was indeed a good answer, which already explained why it behaves different?

The gas moves out faster when it ignited. The faster it moves, the more kinetic energy it has. The more kinetic energy it has, the more kinetic energy the shuttle gains from the equal and opposite reaction.

18
Billions of years of evolution have gone into producing a system to regulate how much water you intake. It's very good, and has been in action since before glasses were even invented.

If you work in the heat and humidity, 8 glasses will not be enough. If you work in an air-conditioned office, 8 glasses will be too much.

If you feel thirsty, drink. No one ever accidentally dies of dehydration because they forgot to drink. And forcing yourself to drink more may be harmful: http://drbenkim.com/drink-too-much-water-dangerous.html

This "8 glasses a day" nonsense is just another old wives tale.

Quote from: Brian Dunning of Skeptoid http://skeptoid.com/episodes/4174
We'll begin with the age-old advice that you should drink at least eight glasses of water a day, or about two liters. If you're backpacking or bicycle racing, that's not really all that much. But for most people, who, like me, sit around watching TV and scratching their belly, this would merely lead to superfluous trips to the bathroom. The problem is that the advice is not only unsupported, it's also misrepresented. The original recommendation seems to come from the Food and Nutrition Board of the National Research Council, which, way back in 1945, said that you should do this. But what seems to have been forgotten is that the report added "Most of this quantity is contained in prepared foods." Omit that, and it appears that you're supposed to stand at the sink and fill your glass eight times a day; which, it turns out, nobody ever recommended in the first place. Whatever you drink normally, in the form of coffee, juice, soft drinks, whatever, probably satisfies most people's water requirements. The evidence for this is that we don't see suited businesspeople laying around on the sidewalks of New York City dying of thirst, stretching out their hands in appeal to passersby.

19
Know what I mean?

20
I'm skeptical Airthumbs, do you have any sources?

21
Homework question?

22
New Theories / Does the future already exist?
« on: 26/04/2011 13:22:33 »
Indeed, it would imply every time a particle bounces off another and goes one way, it creates another universe, while in another universe the particle bounced the other way. Where does the energy come from to keep creating all these universes?

23
The Environment / "Another Hockey Stick Illusion"?
« on: 14/04/2011 11:57:20 »
Too long, didn't read

24
Technology / How does a ramjet push a plane along?
« on: 14/04/2011 11:33:52 »
For a while, the engine will actually fall at a contant velocity.  The incoming air still gets compressed.  But,there's no source of heat so the engine makes negative net thrust (or drag).  The acceleration due to gravity can match the deceleration due to aerodynamic drag.

What's gravity got to do with anything, the same could be said for any object at terminal velocity. I think what Geezer is saying is that it is the fuel that produces the thrust that produces the velocity that enables the compression of the air. No fuel, and your compression will just be drag.

25
As I understand it the main danger from eating off food is not the bacteria but the toxins they produce, I suppose one could build up a tolerance for them. The better plan would be getting to the food pretty quickly after it's been thrown out I think.

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