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Physics, Astronomy & Cosmology / Quantum teleportation?

« on: 14/09/2009 05:51:35 »

Okay, so there's that theory going around about quantum teleportation; where you essentially destroy the person in one location, and recreate a perfect copy in another location. My question is: would the original person be "killed", and would no longer be perceiving things, or would the original's life continue as though they had been teleported? In essence: would your original self cease to exist?

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Physics, Astronomy & Cosmology / Re: What are tachyons?

« on: 13/04/2009 21:48:30 »

I think my head would start hurting too quickly if I research that; I'm sort if the process of learning quite a few other things, and most of my time is spent in a classroom (guess what we're learning in science? Cumulus means "heaped".. amazing, no?)

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Physics, Astronomy & Cosmology / Re: What are tachyons?

« on: 10/04/2009 16:28:44 »

that was... complex and long, and I sort of got confused around the mathematical part, but I think I understood the gist of it.

It's starting to look like tachyons represent "negative" or "inverse" particles? Energy goes up, speed goes down, and vice-versa? I don't mean antimatter, I just mean they sort of appear... flipped from where I stand.

Thanks, that clarified a lot of it (including why they were ever conceived)

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Physics, Astronomy & Cosmology / Re: What are tachyons?

« on: 06/04/2009 22:40:39 »

Ah.. it just interested me because it came up in Watchmen, and I love arguing with their science; it's usually flawed or just plain wrong.

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Physics, Astronomy & Cosmology / Re: What are tachyons?

« on: 06/04/2009 21:58:25 »

makes sense, but what about the idea that it's occurring at subluminal speeds through some sort of fold in space-time? I've heard that theory bandied about as well.

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Physics, Astronomy & Cosmology / Re: What are tachyons?

« on: 06/04/2009 21:42:36 »

oh that makes sense, I suppose. Does anybody know why they are theorized to exist and what they are supposed to explain?

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Physics, Astronomy & Cosmology / What are tachyons?

« on: 06/04/2009 03:22:19 »

Can somebody explain tachyons to me? Wikipedia isn't exactly the best resource for things like this. I just don't understand how something can travel superluminally; isn't the speed of light supposed to be the maximum possible speed? I realize that tachyons are theoretical, I was just wondering if someone could explain it a bit to me.

[MOD EDIT - please phrase your post titles as questions, in line with our general forum policy. This helps people to find information more quickly and also results in posts receiving more responses more quickly. Thank you.]

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Physiology & Medicine / Why am I getting an early-morning vomiting feeling?

« on: 02/03/2009 20:32:46 »

Well I ate rice crackers today and didn't feel sick, so that's score one for the cracker theory. Thanks everybody!

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Physiology & Medicine / Why am I getting an early-morning vomiting feeling?

« on: 02/03/2009 12:02:34 »

LOL I've been doing stuff I shouldn't have, but she's not pregnant, so it's all good. Ironically, some sort of "sympathy pain" was my first idea too.

KarenW: Don't worry about it, I don't mind lewd jokes. I'll try getting into the habit of eating breakfast, but I'll start with crackers; so far, I don't feel like vomiting and it's been 10 minutes

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Physiology & Medicine / Why am I getting an early-morning vomiting feeling?

« on: 01/03/2009 19:53:55 »

I like the cracker theory... mainly because it's really fun to say "cracker theory", but still.. I've found that I find myself saying "I should've eaten something" and the unbidden image of.. crackers (salt crackers, goldfish crackers, etc.) comes to mind. I'll give that a shot.

I don't think I've been stressed because of school for years... Good theory though.

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Physiology & Medicine / Why am I getting an early-morning vomiting feeling?

« on: 01/03/2009 17:21:46 »

I'm 15, and male. When I wake up in the morning lately, I feel like vomiting (and I actually did once in the car). Generally I just sort of retch and think about something else, and it goes away within a few hours. It seems to subside a bit with food, but it's still present. It gets bad on inhalation (as in, when I'm waiting for the school bus and inhale the winter air, it makes me feel like throwing up).

Does anybody have any idea? This has been going on for maybe a few weeks.

I wouldn't've posted here, but I've had good experiences with this forum, and googling "medical forum" gives me forums on specific topics, not a place for topics like this.

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Physics, Astronomy & Cosmology / What causes the Earth to have "seasons"?

« on: 24/02/2009 01:49:37 »

o_O those are all WAY cooler definitions for "vowel" than mine. I'm going to start using those in English class.

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Physics, Astronomy & Cosmology / Re: What causes the Earth to have "seasons"?

« on: 23/02/2009 20:51:20 »

Alright that makes sense... although I have to comment on your use of "whilst"; isn't "whilst" for use just before a word that begins with a vowel?

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Physics, Astronomy & Cosmology / What causes the Earth to have "seasons"?

« on: 23/02/2009 15:16:28 »

The Earth is very, very far from the Sun; and yet, the tilt of the Earth's axis somehow makes such a dramatic change in seasons, despite the incredibly low change in distance (in relation to the total distance). Why does that little change in distance make such a big difference?

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Physics, Astronomy & Cosmology / Re: What is the difference between force and energy?

« on: 22/02/2009 19:55:11 »

Okay, I think I get it for the most part. Thanks everybody

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Physics, Astronomy & Cosmology / Re: What is the difference between force and energy?

« on: 22/02/2009 15:23:39 »

Alright I think I get it, all in all. Thanks for clarifying the definition of force for me.
Although the velocity only changes from +c to -c if it comes to the mirror head-on, doesn't it? If it came at an angle, the right-left component of the direction would be the same, wouldn't it? Ah well, I realize it was only meant for clarification, and it worked; I guess that's what's important.

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Physics, Astronomy & Cosmology / Re: What is the difference between force and energy?

« on: 21/02/2009 20:32:17 »

So gravitational force exists, but when do you call it energy and not force? This is what I'm confused on (or rather, that's my focus.. I'm confused on most of this)

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Physics, Astronomy & Cosmology / Re: What is the difference between force and energy?

« on: 21/02/2009 19:51:58 »

I'm understanding a bit more.. what I'm getting is that it's a force when it's not acting upon anything? and you would call it energy when it starts acting on something and moving it?

About the light question, the wording confused me a bit... the main thing that stood out was the correlation between your question and your username =P. What do you mean "does it make a force on the beam"?

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Physics, Astronomy & Cosmology / What is the difference between force and energy?

« on: 21/02/2009 13:14:21 »

Simple question. I understand that force is (according to wikipedia) "anything that can cause mass to change its velocity", and that energy is "the amount of work that can be performed by a force". What's the difference? When something begins dropping down to the planet, is that force or energy? Is there gravitational energy up above the planet, or is it gravitational energy?

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Physiology & Medicine / Sick with strange symptoms

« on: 18/11/2008 02:28:26 »

Oh right. It says that on the page, doesn't it? It sounds familiar (I read the page, took a break for a while because the computer screen was hurting my eyes, and then read your post).

That does look like it though.. although, again, mine's much lighter. I've scheduled a doctor's appointment