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Using Euro coins as weights (2004)
(www.rubinghscience.org)
180 points
Tomte
| 2 comments |
20 Oct 24 10:18 UTC
|
HN request time: 0s
|
source
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rchowe
◴[
20 Oct 24 12:11 UTC
]
No.
41894824
[source]
▶
>>41894359 (OP)
#
I built a computer vision device that used the top-down area of a penny as a calibration standard. Coins are useful, easy-to-get items that have relatively tight manufacturing tolerances.
replies(2):
>>41894944
#
>>41895122
#
1.
qup
◴[
20 Oct 24 13:05 UTC
]
No.
41895122
[source]
▶
>>41894824
#
Also a penny is .750 exactly. None of the other US coins have a "useful" diameter.
replies(1):
>>41895350
#
ID:
GO
2.
dotancohen
◴[
20 Oct 24 13:49 UTC
]
No.
41895350
[source]
▶
>>41895122 (TP)
#
The US nickel is so close to 5 grams that I've seen them used as weights in a laboratory.
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