InternetCitizen2@lemmy.world to Lemmy Shitpost@lemmy.world · 1 month agoVirgin Physicistslemmy.worldimagemessage-square86fedilinkarrow-up11arrow-down10 cross-posted to: [email protected]
arrow-up11arrow-down1imageVirgin Physicistslemmy.worldInternetCitizen2@lemmy.world to Lemmy Shitpost@lemmy.world · 1 month agomessage-square86fedilink cross-posted to: [email protected]
minus-squareCornelius_Wangenheim@lemmy.worldlinkfedilinkarrow-up0·1 month agoReal world resistors usually have a tolerance of ±5%, so you’ll never get anything that precise.
minus-squarelemming741@lemmy.worldlinkfedilinkEnglisharrow-up0·1 month agoThat’s why I keep a spool of 20 AWG nichrome on hand. Spool off 9.7195853528209 feet and it’ll be bang on.
minus-squareLv_InSaNe_vL@lemmy.worldlinkfedilinkarrow-up0·1 month agoSo 1 inch of your wire would weigh ~0.0987 grams, so to measure down to 8.6350242338508 inches of wire your scale would need to weigh down to ~0.00000000000007 grams. Which is the weight of about a dozen atoms or so.
minus-squarelemming741@lemmy.worldlinkfedilinkEnglisharrow-up0·1 month agoYeah which is why you use a Kibble balance. Are you sure you’re cut out for this kind of work?
minus-squareLv_InSaNe_vL@lemmy.worldlinkfedilinkarrow-up0·1 month agoI’m not a scientist, I’m just in IT haha I figured there was a way to measure that small of weight but I didn’t know!
minus-squareOpisek@lemmy.worldlinkfedilinkarrow-up0·edit-21 month agoWe move onto the next issue. How to precisely measure the length of the wire?
minus-squarelemming741@lemmy.worldlinkfedilinkEnglisharrow-up0·1 month agoIf you trust the gauging, you weigh it.
minus-squareZombiFrancis@sh.itjust.workslinkfedilinkarrow-up0·1 month agoEyeball it. Gotta squint right tho.
Real world resistors usually have a tolerance of ±5%, so you’ll never get anything that precise.
That’s why I keep a spool of 20 AWG nichrome on hand. Spool off 9.7195853528209 feet and it’ll be bang on.
So 1 inch of your wire would weigh ~0.0987 grams, so to measure down to 8.6350242338508 inches of wire your scale would need to weigh down to ~0.00000000000007 grams. Which is the weight of about a dozen atoms or so.
Yeah which is why you use a Kibble balance. Are you sure you’re cut out for this kind of work?
I’m not a scientist, I’m just in IT haha
I figured there was a way to measure that small of weight but I didn’t know!
We move onto the next issue. How to precisely measure the length of the wire?
If you trust the gauging, you weigh it.
Eyeball it. Gotta squint right tho.