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Post by silverdragon on Jun 5, 2015 6:23:37 GMT
The myth states that you cant walk with a full cup of coffee more than seven paces before you start to spill it. The rhythm of your walking sets up some sort of fluid dynamics in the cup, and after seven places, no mater how you try to "damp" that effect through your arm, you may over compensate, and it will spill anyway. This doesnt work with me.... Why?.. Because I have a duff timber, I walk with a limp, so my pace isnt regular, and if I tried to walk more than seven paces without my stick without stopping to grab onto something, I would fall over anyway?.. So I suppose I would spill the coffee.... so its true... oh just ignore what I just said then eh?...  But seriously, this IS something you can all try. **Caution, this is something you CAN try at home**We can do science, we can?.. But I suggest you try this with a cup of water OUTSIDE. Back yard, your neighbours may wonder if you have finally cracked if you start wandering the front lawn stalking a cup of water?... Can you all try this and get back to me to see what your results were?... Including, is it the harder you try the quicker you fail?... And you cant cheat by only using half a cup of water. It must be filled to what would be considered a normal full cup of coffee level, as in no vicars collar. Then again, does that matter that much... In Road haulage, half tanks are harder to transport than full?... |
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Post by OziRiS on Jun 5, 2015 8:11:04 GMT
When I was working as a warehouse manager, plenty of my employees made the trip from one end of the warehouse to the other without spilling a drop of coffee, and that was at least 200 yards. I think they would have spilled a lot more if they'd tried to make that journey in seven steps or less.
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Post by silverdragon on Jun 5, 2015 8:32:43 GMT
I know many customers who can walk the length of my bar without spilling a drop.... but then again, the head on a pint sort of protects you.
With full "flat" drinks, I dont know.
This is a FULL cup I question.
Most people leave a collar on the mug, as in not quite full, so they can move about.
Did your employee's leave that space, or were they brim-full pots?...
I dont believe they hype that you WILL spill, because most people will take a mouthful to give them the space, before they try, I just wondered if anyone can come up with the physics and try a brim full mug.
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Post by OziRiS on Jun 5, 2015 12:23:23 GMT
I know many customers who can walk the length of my bar without spilling a drop.... but then again, the head on a pint sort of protects you. With full "flat" drinks, I dont know. This is a FULL cup I question. Most people leave a collar on the mug, as in not quite full, so they can move about. Did your employee's leave that space, or were they brim-full pots?... I dont believe they hype that you WILL spill, because most people will take a mouthful to give them the space, before they try, I just wondered if anyone can come up with the physics and try a brim full mug. Well, no. Who in their right mind fills a cup they're going to be transporting 200 yards or more to the brim? What kind of greedy *barsteward* intentionally fills their cup to the brim at all? What? You want to make sure that if someone else is going to have some of that coffee, they're definitely not going to take what's rightfully yours? But, for the sake of argument, let's say some greedy soul has filled his cup to the brim. In my experience, picking it up with your hand coming down from directly above the cup, grabbing it with only your fingertips, fingers placed in a star pattern around and just below the brim and then carrying it with a loose wrist will kind of turn your hand into a gyroscope. Whatever your body and the terrain you're traversing does, the surface of the water will stay level and you won't spill anything, or at least not as much as if you carry the cup by the handle or grab it like a regular glass. Granted, this can be difficult to do with a hot cup of coffee, because the cup itself tends to get pretty hot (which is probably why someone invented the handle), but it can be done. I'd be willing to venture a guess that your fingertips being scalded by hot coffee sloshing over the sides will be a pretty good incentive to slow down and keep your cup level. |
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Post by the light works on Jun 5, 2015 15:08:46 GMT
was gonna say, how full is full? this seems to me to be one of those circular argument myths. if you can walk more than 7 paces with it, you didn't fill it full enough.
so I took my water glass, filled it to within 1/8" of the rim, and walked with no problem.
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Post by silverdragon on Jun 6, 2015 4:54:01 GMT
Save coming back for another?...
Does this affect you, that of your drinking it where you stand, or on a table just a couple of feet or yards from where you make the brew, you put more in, or dont fill it quite as much as when you know you are having to walk any distance?...
If I dont fill up to just below the brim, the usual chant around here is "How much for a full one?.."
THAT is a full cup.
And thanks for the interest.
Oziris, You too, I think this one is not as good as it sounds, but then again, its quick and easy... Mini-Myth?...
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Post by OziRiS on Jun 6, 2015 22:15:48 GMT
I don't know... I find it fairly easy to transport completely filled-to-the-brim cups from one place to another, but then again, I've probably done it more than a couple of hundred times in my life.
I use the hand-gyroscope trick. I discovered it when I was 8 years old during a school yard game just before summer vacation. There was a competition to see who could move the most filled-to-the-brim plastic cups of water from one table to another without spilling. It was those really thin-sided white 150 ml cups where the top half is smooth plastic, the bottom half has ridges and the brim is the only thing that even remotely resembles hard plastic (as far as I can tell from movies and TV, the American version is most often white on the inside and red on the outside).
Anyway, on my first couple of tries, I kept spilling as soon as i grabbed the cup, because the sides were so soft that I ended up squeezing the water up and out over the brim. My opponent had the same problem, so we were pretty evenly matched. Then I noticed the brim was more or less solid, but since it was only about 2mm thick I could only get a good hold of it by grabbing it from above with my fingertips. As soon as I started to move, I noticed that I was much quicker to compensate for any movement that made the water start to spill over the sides, partly because I could feel it on my fingertips before it came all the way over and partly because I could constantly feel how the weight was distributed and just compensate with my wrist, keeping the surface of the water level with the ground.
Of course I didn't realize it at the time, because I was only 8, but what I was doing was letting gravity do the work for me. All I really had to do was to just hold on with my fingertips and not fight it. Not that hard.
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Post by c64 on Aug 4, 2015 21:48:56 GMT
It depends on if you hit the resonance frequency or at least relative close to it or not. If you are totally off with your pace, you don't have any problems.
Also trying to prevent spilling actually makes it worse since you see the coffee move and then try to move the cup into the opposite direction which makes it worse because then you hit the resonance frequency easily.
Not looking at your cup and trying to prevent spilling by feeling the movements works good, looking at the cup guarantees disaster.
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