Welcome Guest [Log In] [Register]

This board is closed and will be kept as an archive. Please head to our new home at tch-forum.com



(Existing members: Please check your PMs for your password on the new board. If you do not have a PM, then please send one to me)



Welcome to The Coffee House - your dose of caffeine!

The Coffee House is a friendly and informal community dedicated to having fun. We're a diverse bunch, and so we have plenty to offer, including:
  • Discussions on a wide range of subjects, from science and current events to sport and gaming (and most things in between!);
  • Community-centered forums where members can get to know each other better, and share things they've made;
  • Regularly-scheduled contests, where members can compete for awards and forum currency (Coffee Credits);
  • Shops, where members may spend the Coffee Credits they've earned;
  • A Discord server, where anyone can chat to our members in real time.
What you can see below is a snapshot of what we have to offer. To see the rest, and gain access to all of this, all you need to do is register as a member. Registration is quick, free and easy.

Join our community!

If you're already a member please log in to your account to access all of our features:

Username:   Password:
Add Reply
Physics
Topic Started: Jan 14 2013, 04:26 AM (403 Views)
Michelle
No Avatar
.

I hate it. But you can talk about it here. It's a bunch of *censored* to me.
Like wtf is this.
Posted Image
Posted Image

If anyone knows what that means, don't be afraid to tell me.
Offline Profile Quote Post Goto Top
 
Pyrite
Member Avatar
Just as Planned

I know the first one. That means that the change in entropy (or disorder) of a system approaches zero as the temperature approaches absolute zero (0 K or -273°C, not sure what that'd be in Farenheit).

The third law of thermodynamics states that the entropy of a perfect crystal is zero at absolute zero (0 K). Substances that are not perfect crystals at absolute zero will have some entropy at that temperature.
Offline Profile Quote Post Goto Top
 
Michelle
No Avatar
.

Um what...
Offline Profile Quote Post Goto Top
 
Pyrite
Member Avatar
Just as Planned

I'll just break the equation down:

Posted Image

"lim" stands for the limit.
"ΔS" stands for the change in entropy of the system (entropy is basically disorder)
"T → 0" stands for "as T, the absolute temperature, reaches 0 K)

So essentially, as the temperature tends to 0 K, the change in entropy of a system will approach zero, and the system will have a constant value of entropy (disorder).
Offline Profile Quote Post Goto Top
 
CJ
Member Avatar
A very minor case of serious brain damage

The second one is the time-dependent Schrödinger equation from quantum mechanics. Want me to try and explain the symbols?
Offline Profile Quote Post Goto Top
 
Michelle
No Avatar
.

Still don't get it...
Offline Profile Quote Post Goto Top
 
CJ
Member Avatar
A very minor case of serious brain damage

I'll see if I can explain what that equation is saying in plain English, then, without any symbols:

'Entropy' is basically a measure of how much 'order' there is in a system. If there's more entropy, the system is more disorderly and chaotic. The equation says that as the temperature drops towards absolute zero, the amount of entropy stays more or less the same.
Offline Profile Quote Post Goto Top
 
1 user reading this topic (1 Guest and 0 Anonymous)
« Previous Topic · Science and Nature · Next Topic »
Add Reply


Anti-Spam Bots! Mazeguy Smilies