Recent comments in /f/askscience
panzuulor t1_j46p541 wrote
Reply to comment by Aseyhe in How do we know that dark matter isn't just ordinary matter our instruments can't detect? by jmite
There isn’t enough ordinary matter in the universe to account for it all. All the exoplanets and non-radiating matter is only a tiny fraction of the matter we see. And that only accounts for a small part of the gravity we measure. That’s why dark matter is inferred.
dockriefer69 t1_j46ozle wrote
Reply to comment by die_kuestenwache in What does it mean to torque a screw to a specific torque? by alucemet
Torque requirements can also be used to make sure a fastener is tight enough. A torque wrench or screw driver gives positive feed back when you've reached you're torque setting. So whether you want to make sure it's tight enough or not too tight it works.
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Reply to How do giraffes breathe? by NimishApte
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5J7XM33IXN4XCQI6B2BB t1_j46oexa wrote
Reply to comment by W0tzup in What does it mean to torque a screw to a specific torque? by alucemet
The purpose of torquing is to apply a specific(ish) amount of preload to the screw. It has nothing to do with protecting the threads.
In many applications, a bolt can only be used once anyways because it stretches during torquing the first time it is used.
UpperCardiologist523 t1_j46o6wn wrote
Reply to comment by NimdokBennyandAM in How do giraffes breathe? by NimishApte
>Their cavernous lungs
I love this. I need to start using "Cavernous" more. Maybe to describe the emptiness of my bank account and wallet.
[deleted] t1_j46nwig wrote
Reply to comment by die_kuestenwache in What does it mean to torque a screw to a specific torque? by alucemet
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julie78787 t1_j46nf6e wrote
Reply to comment by fighter_pil0t in What does it mean to torque a screw to a specific torque? by alucemet
So long as you don't stop, then start, then stop, hoping to hit the correct torque.
Once you stop, the coefficient of static friction will increase the apparently torque, potentially leaving the fastener under-torqued.
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Reply to comment by [deleted] in When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
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backfist1 t1_j46luq5 wrote
Reply to comment by bawki in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
Better yet, open a vegan hospital and let them all go there. See how they survive
[deleted] t1_j46lun3 wrote
kilotesla t1_j46lu62 wrote
Reply to comment by die_kuestenwache in What does it mean to torque a screw to a specific torque? by alucemet
The third hazard of over tightening is stripping the threads, either the threads of the screw or the threads of the nut or threaded hole it is going into.
Seicair t1_j46lt0m wrote
Reply to comment by MostCuriousExplorer in where does epinephrine comes from? The one used for people with allergies because Google only says It comes from glands so I don't understand if it's donated or sintethized by other means. by SALAMI_21
It’s this, just barely down the wiki page they linked. That’s it, that’s the chemical composition of adrenaline, no matter where it comes from. I don’t know what you mean by size.
[deleted] t1_j46lsbs wrote
kilotesla t1_j46lmjd wrote
Reply to comment by abat6294 in What does it mean to torque a screw to a specific torque? by alucemet
>So if a screw spins with 5 in-lbs of torque, then you simply can't apply 7 in-lbs - it moves before 7 is reached.
Or if you did apply 7-in pounds, you would accelerate it rapidly and it would spend very fast, which isn't really possible with a manual tool although it could be possible with an electric tool, but spinning very fast would make it hard to avoid overshooting the final level of tightening that you want to achieve, and the whole thing becomes simpler when you go slow enough that inertial forces are negligible.
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Reply to comment by [deleted] in When nerve damage occurs, where is the pain perceived? at the site of damage or at the end of the nerve? by menooby
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Reply to comment by froggo921 in How do giraffes breathe? by NimishApte
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Reply to comment by minkey-on-the-loose in What does it mean to torque a screw to a specific torque? by alucemet
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[deleted] t1_j46paao wrote
Reply to How do giraffes breathe? by NimishApte
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