Food thread

Probably what *this* should be called.
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Re: Food thread

Post by Rylinks » Wed May 26, 2021 3:43 pm

Khaos wrote: Wed May 26, 2021 2:36 pm i don't know anything about water conductivity but shouldn't it be like, 2000ohms per unit of uh, volume or distance? area?
the resistance ranges over many orders of magnitude depending on purity, so i think people usually use it as a quick check and don't worry about the effect of the distance or the water dimensions

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Re: Food thread

Post by Khaos » Wed May 26, 2021 4:04 pm

Rylinks wrote: Wed May 26, 2021 3:43 pm
Khaos wrote: Wed May 26, 2021 2:36 pm i don't know anything about water conductivity but shouldn't it be like, 2000ohms per unit of uh, volume or distance? area?
the resistance ranges over many orders of magnitude depending on purity, so i think people usually use it as a quick check and don't worry about the effect of the distance or the water dimensions
i guess that makes sense

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Re: Food thread

Post by Dantes » Wed May 26, 2021 6:03 pm

So role of thumb, if you drop an extension cord in your water, and it doesn't electrocute you, it's safe to drink.
Pour like Hemingway's last call.

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Re: Food thread

Post by Khaos » Wed May 26, 2021 6:14 pm

Doug wrote:
Khaos wrote: Wed May 26, 2021 2:36 pm i don't know anything about water conductivity but shouldn't it be like, 2000ohms per unit of uh, volume or distance? area?
Per meter
apparently area is used, not distance

wait no im dumb. but per metre is wrong too

it's ohm metres

:themoreyouknow:

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Re: Food thread

Post by Khaos » Wed May 26, 2021 6:22 pm

so if the water "resistivity" was 20 ohm-metres, you could fill a cylinder with it and measure resistance across the height of it (basically make a wire made of water)

then the cross-sectional area of the cylinder could be used to figure out the ohms per meter.

if the cross sectional area of the water-wire was 0.01m^2, then the resistance would be 20/0.01 -> 2,000 ohms per meter, i think?

i usually just look up ohms/meters for cables in a table

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Re: Food thread

Post by Doug » Wed May 26, 2021 7:02 pm

Khaos wrote: Wed May 26, 2021 6:14 pm
Doug wrote:
Khaos wrote: Wed May 26, 2021 2:36 pm i don't know anything about water conductivity but shouldn't it be like, 2000ohms per unit of uh, volume or distance? area?
Per meter
apparently area is used, not distance

wait no im dumb. but per metre is wrong too

it's ohm metres

:themoreyouknow:
Conductance and resistance are reciprocal, one is per meter and the other is times meters :)
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Re: Food thread

Post by Dantes » Wed May 26, 2021 7:33 pm

Khaos wrote: Wed May 26, 2021 6:22 pm so if the water "resistivity" was 20 ohm-metres, you could fill a cylinder with it and measure resistance across the height of it (basically make a wire made of water)

then the cross-sectional area of the cylinder could be used to figure out the ohms per meter.

if the cross sectional area of the water-wire was 0.01m^2, then the resistance would be 20/0.01 -> 2,000 ohms per meter, i think?

i usually just look up ohms/meters for cables in a table
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Re: Food thread

Post by Khaos » Wed May 26, 2021 7:58 pm

Doug wrote:Conductance and resistance are reciprocal, one is per meter and the other is times meters :)
i dont understand what you're saying here

i'm reasonably sure there's no specific term for ohms per meter

resistance : ohms
conductivity : 1/ohms
"resistivity" : ohm*meters

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Re: Food thread

Post by Doug » Wed May 26, 2021 8:40 pm

Khaos wrote: Wed May 26, 2021 7:58 pm
Doug wrote:Conductance and resistance are reciprocal, one is per meter and the other is times meters :)
i dont understand what you're saying here
I'm saying that while resistance is resistivity times meters divided by cross-section, conductance is conductivity times cross-section divided by meters

The first is per meter while the second is times meters
i'm reasonably sure there's no specific term for ohms per meter
I don't think so either. But siemens per meter is conductivity, and siemens are the reciprocal of ohms
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Re: Food thread

Post by Khaos » Wed May 26, 2021 9:25 pm

Doug wrote:
Khaos wrote: Wed May 26, 2021 7:58 pm
Doug wrote:Conductance and resistance are reciprocal, one is per meter and the other is times meters :)
i dont understand what you're saying here
I'm saying that while resistance is resistivity times meters divided by cross-section, conductance is conductivity times cross-section divided by meters

The first is per meter while the second is times meters
this makes sense now but i dont think it jives with what you first said!

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Re: Food thread

Post by Doug » Wed May 26, 2021 9:39 pm

Khaos wrote: Wed May 26, 2021 9:25 pm
Doug wrote:
Khaos wrote: Wed May 26, 2021 7:58 pm
i dont understand what you're saying here
I'm saying that while resistance is resistivity times meters divided by cross-section, conductance is conductivity times cross-section divided by meters

The first is per meter while the second is times meters
this makes sense now but i dont think it jives with what you first said!
Oh you asked if conductivity should be per distance

I was trying to say that yes, it is, when we incorporate it into conductance

But it's not ohms per distance, it's (the reciprocal of ohms) per distance
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Re: Food thread

Post by Khaos » Wed May 26, 2021 9:40 pm

Doug wrote:
Khaos wrote: Wed May 26, 2021 9:25 pm
Doug wrote:
I'm saying that while resistance is resistivity times meters divided by cross-section, conductance is conductivity times cross-section divided by meters

The first is per meter while the second is times meters
this makes sense now but i dont think it jives with what you first said!
Oh you asked if conductivity should be per distance

I was trying to say that yes, it is, when we incorporate it into conductance

But it's not ohms per distance, it's (the reciprocal of ohms) per distance
yea. i said conductivity but i meant resistivity because really who uses conductivity that way any way. no-one, that's who

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Re: Food thread

Post by Khaos » Wed May 26, 2021 9:42 pm

doug is the leading expert on siemen

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Re: Food thread

Post by Doug » Wed May 26, 2021 9:45 pm

Not anymore
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Re: Food thread

Post by Crunchums » Wed May 26, 2021 9:52 pm

Khaos wrote: Wed May 26, 2021 9:25 pm i don't think it jives with what you first said
are you testing me
u gotta skate

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Re: Food thread

Post by Khaos » Wed May 26, 2021 9:54 pm

...no?

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Re: Food thread

Post by Crunchums » Wed May 26, 2021 9:59 pm

then i am contractually obligated to inform you that you meant "jibes"
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Re: Food thread

Post by Khaos » Wed May 26, 2021 10:00 pm

that doesnt sound right

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Re: Food thread

Post by Khaos » Wed May 26, 2021 10:02 pm

google says that jive is also acceptable :smug:

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Re: Food thread

Post by Crunchums » Wed May 26, 2021 10:09 pm

yeah personally i don't care about that one
but the contract is the contract
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Re: Food thread

Post by Doug » Wed May 26, 2021 10:40 pm

Khaos wrote: Wed May 26, 2021 9:40 pm
Doug wrote:
Khaos wrote: Wed May 26, 2021 9:25 pm
this makes sense now but i dont think it jives with what you first said!
Oh you asked if conductivity should be per distance

I was trying to say that yes, it is, when we incorporate it into conductance

But it's not ohms per distance, it's (the reciprocal of ohms) per distance
yea. i said conductivity but i meant resistivity because really who uses conductivity that way any way. no-one, that's who
So to get back to this, then yes your instincts are correct, the resistance would increase the more distance had to be covered, and also yes, people talk about resistance a lot more than conductance
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Re: Food thread

Post by Khaos » Thu May 27, 2021 3:21 am

Doug wrote:So to get back to this, then yes your instincts are correct, the resistance would increase the more distance had to be coverede
yes i know this :lol: i was actually just curious about the specific units of resistivity because ohms / m is meaningless outside of cable reference tables

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Re: Food thread

Post by pterrus » Thu May 27, 2021 1:18 pm

Finally, my area of expertise. We use a conductivity sensor on the station to monitor the purity of the water we use to scrub the suit water loops. They measure in microsiemens per cm.

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Re: Food thread

Post by Doug » Fri Jul 02, 2021 3:41 pm

Burgers 1.jpg
Burgers 1.jpg (68.88 KiB) Viewed 912 times
Burgers 2.jpg
Burgers 2.jpg (51.59 KiB) Viewed 912 times


Left: Whopper order, from the bottom, is patty, cheese, pickles, ketchup, onions, tomato, lettuce, mayo (which can go on the top bun)
Right: Spongebob order, from the bottom, patty, lettuce, cheese, onion, tomato, ketchup, mayo, pickles
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Re: Food thread

Post by Doug » Fri Jul 16, 2021 3:20 am

A Jollibee is opening very close to me. This is a Filipino fast food chain. I'm very excited about this
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Re: Food thread

Post by Doug » Fri Jul 16, 2021 3:21 am

btw the Spongebob burger above is how I make my burgers now. It's quite incredible

And yeah I have to have all the stuff, fresh onion and tomato, etc.
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Re: Food thread

Post by Khaos » Fri Jul 16, 2021 3:33 pm

processed cheese is bleh

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Re: Food thread

Post by Rylinks » Fri Jul 16, 2021 3:35 pm

processed cheese is great on burgers specifically

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Re: Food thread

Post by Rylinks » Fri Jul 16, 2021 3:36 pm

although if you're not going to melt it on the burger directly it loses many of its advantages

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Re: Food thread

Post by Doug » Fri Jul 16, 2021 3:36 pm

It's true

At the same time, Khaos is kinda right that a slice of say gouda might be better or nicer
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