Can someone explain to me what a quark is, and how we know that it exists?
Can someone explain to me what a quark is, and how we know that it exists?
Robbie wrote: The one I don't get is rhubarb. "Johny ate those leaves and got really sick. I'm gonna try the stem. Bleh! Bitter! How about we put this junk in a pie with some strawberries and loads of sugar? I bet it'll be good then."
I don't get onions.
"This weird vegetable tastes like regret, smells like rot, and makes my eyes water. Let's put it in every damn thing!"
Or, more realistically:
"Crops are way down this year and we could be facing a famine, but we found these awful things growing in the forest that are technically edible. Let's cut them into tiny pieces and mix them into everything in small amounts so we don't taste them too much." (And then people forgot to stop putting them in everything)
Onions are delicious! Take some fresh Vidalia onions, wrap in foil with salt, pepper, and lots of butter, and throw them on the grill for a good while. Eat Awesomeness.
How do you remove Permanent Marker from a Dry-Erase Whiteboard? (we've all done it) Write over it with Dry-Erase and it will wipe right off.
That's a freebie.
1988RedT2 wrote: Can someone explain to me what a quark is, and how we know that it exists?
A quark is a type of parton, which is a type of subatomic particle which makes up hadrons such as protons. We know they exist because protons have been broken into smaller particles in particle accelerator experiments.
In reply to pinchvalve:
I knew that one! 
golfduke wrote:slefain wrote: How do they know how much weight a bridge can hold to put on the signs?Nowadays? Finite element analysis of individual components strung together into an engineered structure, then back off the theoretical load value with a healthy safety factor. Before CAD, FEA, and material science programs? 'Yeah, that looks like a 2 ton bridge... sure.'
Statics only was used a lot. It is simple mathematical problems all added together to determine all of the forces on one piece of the bridge. Sum of the forces in the x,y,z directions to determine what the overall force on a single member is. The member can then be designed to withstand this load. The load AND its safety factor are design limitations that are established BEFORE any design is done.
Using this process, you can end up with situations like the Tacoma Narrows Bridge... Go look it up... I'll wait...
Okay, youre back?.... Great. They learned that dynamic loads must also be applied. The safety factor of the static load of the vehicles, gravity, etc wasn't enough to design bridges properly. They needed to take dynamic loads into account such as wind, heavy point loads of vehicles MOVING across the bridge, etc...
This can ALL be done with a simple scientific calculator... Ask any 2nd year mechanical or civil engineer...
FEA is WAY easier, but it still needs done or even started with a general knowledge of how statics and dynamics works. Without that, it would be design by trial and error with FEA only really telling you if your design worked or not.
I realize some of the newer, better programs can give you some insight into how to do it better, but you still need the basics.
Anybody ever come across a body of water (even a puddle) in the middle of nowhere with fish or other fauna in it?
How the hell did it get there?
There is a cabin I used to go to in South Carolina.
There was an 8 foot alligator in the pond. The nearest body of water capable of sustaining an animal that large was like 10 miles away. How the hell did it get to this pond?
If Hungary was attacking Turkey from the rear, do you think Greece would help?
wvumtnbkr wrote: Anybody ever come across a body of water (even a puddle) in the middle of nowhere with fish or other fauna in it? How the hell did it get there? There is a cabin I used to go to in South Carolina. There was an 8 foot alligator in the pond. The nearest body of water capable of sustaining an animal that large was like 10 miles away. How the hell did it get to this pond?
I'm gonna go with aliens.
wvumtnbkr wrote: Anybody ever come across a body of water (even a puddle) in the middle of nowhere with fish or other fauna in it? How the hell did it get there? There is a cabin I used to go to in South Carolina. There was an 8 foot alligator in the pond. The nearest body of water capable of sustaining an animal that large was like 10 miles away. How the hell did it get to this pond?
I can not speak for your alligator but my understanding for fish getting into new, fresh bodies of water has to do with the feet of ducks.
The ducks walk around one pond (with fish and fish eggs) and then unknowingly transfer those eggs to a new pond they visit.
The Googles gives me this somewhat supporting theory evidence.
Why isnt it easier to post a pic on here?
wvumtnbkr wrote: Anybody ever come across a body of water (even a puddle) in the middle of nowhere with fish or other fauna in it? How the hell did it get there? There is a cabin I used to go to in South Carolina. There was an 8 foot alligator in the pond. The nearest body of water capable of sustaining an animal that large was like 10 miles away. How the hell did it get to this pond?
Don't know if you remember, but years ago, there was that giant lake by Gander Mtn, on the side of 30. My job was supervising the pumps draining it so we could clear the clogged drain under it. Well once we got down to the last foot or so of water, we started finding all kinds of bizarre fish. Obviously had to get there from somewhere, but to this day none of us who worked there have ever seen fish that looked like what was in that lake.
Looked like 6"long gold fish with bulldog faces.
All the streams in the area have regular creek chubs and shiners, the nearest carp lake is miles away. Just strange.
Nick (Bo) Comstock wrote: Why isn't it more well known that Johnny O'Connell tried to murder Dario Franchitti?
Wait, what?
pinchvalve wrote: How do you remove Permanent Marker from a Dry-Erase Whiteboard? (we've all done it) Write over it with Dry-Erase and it will wipe right off. That's a freebie.
Alternately, you can just spray it with brake cleaner. :)
Toyman01 wrote: This is such a diverse group of people, I doubt there is much we don't know. As a group, we also tend to spend most of our time learning. Not in a official way, but just satisfying curiosity. And with that insatiable curiosity, comes the love of sharing what we learn. This is the only group I know that has this dynamic, and the only reason I still spend a fair amount of time on here. So the true question, and the one we probably will never answer completely, is why. Why this place, and why it has stayed cohesive for so long.
I agree, and I also wonder why here. I think it's because it's all encompassing. We don't segregate by car make or model, or even just cars for that matter. We share such a wide, diverse interest that there is always someone here who shares that as well. It makes it more comfortable to share with others knowing that there is likely someone in the group that will see your inner-most secret desire and go "Damn, that IS a good idea. I need to do that too." The more you share, the more you learn, the more we all as a group grow.
In reply to daeman:
I would love to see a video of those machines in action. I'm drooling at the thought.
How come we only get one or two kinds of bananas when there are about 1000 kinds available?
gearheadmb wrote: Why isnt it easier to post a pic on here?
This +1,000,000
Although I do understand it has to do with servers and capacity. It's still REALLY frustrating.
oldtin wrote: How come we only get one or two kinds of bananas when there are about 1000 kinds available?
Because the ones we use are durable for shipping and resistant to many diseases. Unfortunately there is a fungus going around wiping out the banana trees in whole regions, do a bit of research on it, it sucks and is kinda scary. We may be without nanners soon.
wvumtnbkr wrote: Using this process, you can end up with situations like the Tacoma Narrows Bridge... Go look it up... I'll wait...
GameboyRMH wrote:Robbie wrote: The one I don't get is rhubarb. "Johny ate those leaves and got really sick. I'm gonna try the stem. Bleh! Bitter! How about we put this junk in a pie with some strawberries and loads of sugar? I bet it'll be good then."I don't get onions. "This weird vegetable tastes like regret, smells like rot, and makes my eyes water. Let's put it in every damn thing!" Or, more realistically: "Crops are way down this year and we could be facing a famine, but we found these awful things growing in the forest that are technically edible. Let's cut them into tiny pieces and mix them into everything in small amounts so we don't taste them too much." (And then people forgot to stop putting them in everything)
Guess the dish having its invention being described:
"Maggie, get dinner on!"
"But Angus, all we've got left is leavings from the sheep slaughter and yesterday's porridge."
"Well?"
"..I'll see what I can do."
codrus wrote:pinchvalve wrote: How do you remove Permanent Marker from a Dry-Erase Whiteboard? (we've all done it) Write over it with Dry-Erase and it will wipe right off. That's a freebie.Alternately, you can just spray it with brake cleaner. :)
That is kind of like removing undercoating (or sticker/duct tape adhesive) with penetrating oil, or removing shoe polish at the bracket races by first writing over it with more shoe polish.
The fact that you're adding the same or similar solvent to the dried base makes it dissolve again and you can more easily remove it.
(Also, jeez, the easily wiped off marking compound is only a couple bucks more than shoe polish at the track, buy one less $3 hot dog and buy the good stuff already you cheapskate 
)
KyAllroad wrote:oldtin wrote: How come we only get one or two kinds of bananas when there are about 1000 kinds available?Because the ones we use are durable for shipping and resistant to many diseases. Unfortunately there is a fungus going around wiping out the banana trees in whole regions, do a bit of research on it, it sucks and is kinda scary. We may be without nanners soon.
I have had allergy issues and went to one of those natural doc's that tested me and one of my biggest issue is with the 2-3 banana's I eat every day. Lots of that fungus and mold is messing with my allergy's. I cut them out and can breath better.
1988RedT2 wrote: Onions are delicious! Take some fresh Vidalia onions, wrap in foil with salt, pepper, and lots of butter, and throw them on the grill for a good while. Eat Awesomeness.
When I started dating the wife her 'bama family cut up a sweet onion at every meal and ate them cut in pieces like an apple with dinner every night along with corn bread and I ran far away from eating raw onions.
Thirty years later I love to eat sweet onions raw on salads - now those wet, heavy grass clippings they call collard greens I still don't like.
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