So I was having breakfast with my friend today, at Perkins. He put down his coffee, and we're talking about whatever. Suddenly, his coffee slides about 2 inches over. I could have sworn he was pushing it, but he wasn't. We both just looked at each other. It was weiiird.....
Haha, that's happened to me before. It turned out that the desk I set the coffe cup on was slightly slanted. The bottom of the cup was wet, so static friction wasn't as strong as it normally is. I think it may have something to do with the air underneath the cup heating up, expanding and helping to reduce the needed force to nullify static friction.
Quote from: Sidoh on September 14, 2006, 12:57:37 PM
Haha, that's happened to me before. It turned out that the desk I set the coffe cup on was slightly slanted. The bottom of the cup was wet, so static friction wasn't as strong as it normally is. I think it may have something to do with the air underneath the cup heating up, expanding and helping to reduce the needed force to nullify static friction.
Yeah, there was a little spilled coffee under, but it didn't feel like it was sliding. You might be right, though, if the water heated up enough to expand!
Quote from: Sidoh on September 14, 2006, 12:57:37 PM
Haha, that's happened to me before. It turned out that the desk I set the coffe cup on was slightly slanted. The bottom of the cup was wet, so static friction wasn't as strong as it normally is. I think it may have something to do with the air underneath the cup heating up, expanding and helping to reduce the needed force to nullify static friction.
Ron, don't listen to the bull. It is obvious that there are ghosts at your Perkins.
Haha, mine moved in a really weird way too, but I was able to repeat the action by moving it back up to the top of my desk and waiting a few seconds.
Quote from: AntiVirus on September 14, 2006, 01:26:51 PM
Ron, don't listen to the bull. It is obvious that there are ghosts at your Perkins.
Yeah, you're probably right. :(
Quote from: Sidoh on September 14, 2006, 01:27:41 PM
Quote from: AntiVirus on September 14, 2006, 01:26:51 PM
Ron, don't listen to the bull. It is obvious that there are ghosts at your Perkins.
Yeah, you're probably right. :(
I know. I am just smart like that. ^^
Quote from: Sidoh on September 14, 2006, 01:27:41 PM
Haha, mine moved in a really weird way too, but I was able to repeat the action by moving it back up to the top of my desk and waiting a few seconds.
Quote from: AntiVirus on September 14, 2006, 01:26:51 PM
Ron, don't listen to the bull. It is obvious that there are ghosts at your Perkins.
Yeah, you're probably right. :(
Haha, I couldn't repeat it.
Clearly its ghosts.
Not just any ghost though... Canadian coffee addicted ghosts
DUN Dun dun
Oh no! What does that mean for us!??!
Well for starters, these ghosts say "eh" instead of "boo"
Because of all the caffeine, they really are extra restless so I forsee a dramatic increase in slimer-type goo.
Just remember who to call if you see something strange and it don't look good (ghostbusters!)
Hahahahaha.
Quote from: unTactical on September 14, 2006, 04:21:11 PM
Well for starters, these ghosts say "eh" instead of "boo"
Because of all the caffeine, they really are extra restless so I forsee a dramatic increase in slimer-type goo.
Wait... this sounds like most people I know... they're all ghosts! :o
Also, pfft, real canadian coffee ghosts haunt Tim Hortons.
Quote from: iago on September 14, 2006, 01:25:53 PM
Yeah, there was a little spilled coffee under, but it didn't feel like it was sliding. You might be right, though, if the water heated up enough to expand!
Heat makes metal expand? Now look who's crazy.
Quote from: deadly7 on September 16, 2006, 11:16:18 PM
Heat makes metal expand? Now look who's crazy.
Heat makes all matter expand.
There's a classic physics experiment that involves two rods, one containing a ring that barely allows the ball on the other through. While the rod with the ball is through the one with the ring, you heat the ball using a Bunsen burner for 10-20 seconds, afterwhich the ball doesn't go through the ring.
We were saying that the heat expanded the air pocket between the cup and the table, reducing the force required to overcome static friction.
Quote from: Sidoh on September 16, 2006, 11:38:41 PM
Heat makes all matter expand.
There's a classic physics experiment that involves two rods, one containing a ring that barely allows the ball on the other through. While the rod with the ball is through the one with the ring, you heat the ball using a Bunsen burner for 10-20 seconds, afterwhich the ball doesn't go through the ring.
We were saying that the heat expanded the air pocket between the cup and the table, reducing the force required to overcome static friction.
You fail. I was quoting The Simpsons. :( But I didn't know it expanded ALL matter expand.
All macroscopic matter, but that's implied. :P
I've only seen 30-50 simpsons episodes, so sorry for the misunderstanding. :(
Wow. I need to proofread. "I didn't know it expanded ALL matter expand." *chuckles to self*
Quote from: Sidoh on September 17, 2006, 12:55:49 AM
All macroscopic matter, but that's implied. :P
I've only seen 30-50 simpsons episodes, so sorry for the misunderstanding. :(
Is there a difference? I thought matter is matter.. be it macro- or micro-scopic.
You're forgiven. But only because eres tu(accent) dia primero.
A regular classical phsyicist, you are. :P
That depends on what you mean by "microscopic," of course.
The motion of particles constitutes temperature. If you reduce "microscopic" to the scale of the moving particles, than of course nothing is going to be expanding.
Quote from: Sidoh on September 16, 2006, 11:38:41 PM
Quote from: deadly7 on September 16, 2006, 11:16:18 PM
Heat makes metal expand? Now look who's crazy.
Heat makes all matter expand.
There's a classic physics experiment that involves two rods, one containing a ring that barely allows the ball on the other through. While the rod with the ball is through the one with the ring, you heat the ball using a Bunsen burner for 10-20 seconds, afterwhich the ball doesn't go through the ring.
We were saying that the heat expanded the air pocket between the cup and the table, reducing the force required to overcome static friction.
How... did... you... not... *sigh*
Quote from: Blaze on September 17, 2006, 02:58:43 AM
How... did... you... not... *sigh*
How... did... you ... not...
Quote from: Sidoh on September 17, 2006, 12:55:49 AM
I've only seen 30-50 simpsons episodes, so sorry for the misunderstanding. :(
Quote from: Sidoh on September 17, 2006, 03:01:07 AM
Quote from: Blaze on September 17, 2006, 02:58:43 AM
How... did... you... not... *sigh*
How... did... you ... not...
Quote from: Sidoh on September 17, 2006, 12:55:49 AM
I've only seen 30-50 simpsons episodes, so sorry for the misunderstanding. :(
I read that, but common! I've seen that one episode a million times! A MILLION.
Quote from: deadly7 on September 16, 2006, 11:16:18 PM
Quote from: iago on September 14, 2006, 01:25:53 PM
Yeah, there was a little spilled coffee under, but it didn't feel like it was sliding. You might be right, though, if the water heated up enough to expand!
Heat makes metal expand? Now look who's crazy.
Just to point it out again, I said water, not metal. And what I meant was evaporate, not expand. You're way off on your quote!
Quote from: Sidoh on September 17, 2006, 01:42:45 AM
A regular classical phsyicist, you are. :P
That depends on what you mean by "microscopic," of course.
The motion of particles constitutes temperature. If you reduce "microscopic" to the scale of the moving particles, than of course nothing is going to be expanding.
I think you're mis-using the word 'microscopic', although I can't think of the right way of saying it right now. But strictly speaking, germs, for instance, are microscopic. Germs do, in some way, expand when heated, so therefore you're misusing the word 'microscopic'. But who really cares, right? :P
Quote from: iago on September 17, 2006, 03:38:10 AM
I think you're mis-using the word 'microscopic', although I can't think of the right way of saying it right now. But strictly speaking, germs, for instance, are microscopic. Germs do, in some way, expand when heated, so therefore you're misusing the word 'microscopic'. But who really cares, right? :P
I also made it more explicit later in the thread. I don't know if you noticed. I was aware of this ambiguity before I used the word, but the context was supposed to clear that up. :p
Quote from: iago on September 17, 2006, 03:38:10 AM
Just to point it out again, I said water, not metal. And what I meant was evaporate, not expand. You're way off on your quote!
I don't pride myself on reading every single word in a post. :)
Quote from: deadly7 on September 17, 2006, 11:20:40 AM
Quote from: iago on September 17, 2006, 03:38:10 AM
Just to point it out again, I said water, not metal. And what I meant was evaporate, not expand. You're way off on your quote!
I don't pride myself on reading every single word in a post. :)
I'm not entirely sure that you read ANY words in that post! :P
I read "Heated up" and "Expand"!
:( Jerk.