General > Cooking
New Digital Scale
Nusa:
--- Quote from: SilverSolder on April 27, 2021, 11:19:25 pm ---
--- Quote from: wraper on April 27, 2021, 11:11:44 pm ---
--- Quote from: SilverSolder on April 27, 2021, 11:06:14 pm ---But, the weight of coins could be useful in some circumstances when 1% is "good enough for Australia".
--- End quote ---
But scales most likely will be better than that even considering they were calibrated at place with different gravitational acceleration. So IMHO the most you can use them for is checking if scales are not displaying outright wrong numbers. Or making a rough calibration on scales which were calibrated a very long time ago and thus drifted over time.
--- End quote ---
I was thinking of rather extreme circumstance, e.g. you are camping, don't have a scale with you, and need to measure out an ounce of butter... and you do have five quarters!
--- End quote ---
Out of curiosity, how do you use the quarters if you don't have a scale with you?
As far as butter goes, there's usually 4 sticks in a pound, so 4 oz per stick, so 1 oz would be 1/4th stick. And that information is generally marked on the stick wrapper as well. Alternately, you could just remember two tablespoons in an ounce. I'm aware that "ounce" is an ambiguous unit. For cooking purposes while camping, the weight and volume measures are close enough to the same thing in the case of butter. (Of course, real cooks are experienced enough to eyeball such things, even when the tools are available.)
Muttley Snickers:
Down here many if not all Australia Post Offices have a decent digital weight scale on the front counter which one would assume is accurately calibrated on a regular basis. Sometimes when I go to pay a utility bill at the post office I quickly check the weight of my Asus Zenfone which is always 214 grams regardless of which post office I go to, my mobile phone has become a handy transfer standard. :-/O
SilverSolder:
--- Quote from: Nusa on April 28, 2021, 12:51:17 am ---
--- Quote from: SilverSolder on April 27, 2021, 11:19:25 pm ---
--- Quote from: wraper on April 27, 2021, 11:11:44 pm ---
--- Quote from: SilverSolder on April 27, 2021, 11:06:14 pm ---But, the weight of coins could be useful in some circumstances when 1% is "good enough for Australia".
--- End quote ---
But scales most likely will be better than that even considering they were calibrated at place with different gravitational acceleration. So IMHO the most you can use them for is checking if scales are not displaying outright wrong numbers. Or making a rough calibration on scales which were calibrated a very long time ago and thus drifted over time.
--- End quote ---
I was thinking of rather extreme circumstance, e.g. you are camping, don't have a scale with you, and need to measure out an ounce of butter... and you do have five quarters!
--- End quote ---
Out of curiosity, how do you use the quarters if you don't have a scale with you?
As far as butter goes, there's usually 4 sticks in a pound, so 4 oz per stick, so 1 oz would be 1/4th stick. And that information is generally marked on the stick wrapper as well. Alternately, you could just remember two tablespoons in an ounce. I'm aware that "ounce" is an ambiguous unit. For cooking purposes while camping, the weight and volume measures are close enough to the same thing in the case of butter. (Of course, real cooks are experienced enough to eyeball such things, even when the tools are available.)
--- End quote ---
I can see, I should have put a smiley in there somewhere! :D
OK so in the hypothetical situation where you need to weigh something to 1% and you don't have a scale, but you do have 6 quarters: you could make a makeshift balance out of random materials that you find, and balance it using three quarters on each side, before using the quarters for weighing the target material?
Kleinstein:
There are several ways to build a makeshift scale. For camping it could be as little as a plastic bag on a suitable branch and look for the same movement.
For using the quarters as weight one may even get away with only 3 quarters if one has something else to get initial balance. The quarter acts double when moved from one side to the other.
Gravity does not change that much, but for really high resolution scales it may matter. However than one may also care about humidity and temperature as it changes the air density and thus the buoyancy correnction.
The scales at the post office may need to be quite good as they are used from something like a 10 g air mail letter to 30 kg parcel. For work I have a simialar one: 0.1 g resolution up to some 30 kg.
The weight of a letters is a bit tricky however, it can change with humidity.
DrG:
In the spirit of this particular thread drift.....
As already stated US cents in 1982 were either copper (3.11 gm) or copper plated zinc (2.5 gm). 1909-1981 are all 3.11gm and 1983-current are all 2.5 gm.
To figure out which 1982 metal content you have, you can make a simple balance like the one shown here https://www.cointalk.com/threads/a-guide-to-1982-lincoln-cent-identification.55647/
But, I can drift even further. Given 11 1982 cents (all 3.11 or 2.5) and one different weighted 1982 cent (either 3.11 or 2.5, depending on which you chose for the other 11). I bet you that using such a simple balance (in this case, we don't need the post 1982 cent at all, just a balance that can discriminate the two weights by up or down) only three times, I can determine, without fail, which cent is the odd weight and whether it is heavier or lighter than the other 11....and I never need to see the date at all.
Not enough drift?
How about lighting a red led using SilverSolder's 5 cents?
https://www.exploratorium.edu/snacks/penny-battery
(ok, and some salt solution, vinegar and cardboard).
Anybody can drift the topic further ? ;D Although one could make the case that the first example is definitely mathematical and programming and the second definitely electronics, so maybe they are side drifts to other topic areas.
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