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Does each language have "lefty loosey righty tighty"? (lemmy.world)

submitted 1 month ago* (last edited 1 month ago) by vatlark@lemmy.world to c/asklemmy@lemmy.ml

313 comments fedilink hide all child comments

The world has a lot of different standards for a lot of things, but I have never heard of a place with the default screw thread direction being opposite.

So does each language have a fun mnemonic?

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[–] wuphysics87@lemmy.ml 35 points 1 month ago* (last edited 1 month ago) (3 children)

The Right Hand Rule (RHR). Point the thumb of your right hand in the direction you want something to go. Curl your fingers. That is the direction of rotation. Translate to any language which has hands.

[–] arefx@lemmy.ml 10 points 1 month ago (1 children)

I guess I'm an idiot because I don't understand lmao

[–] isyasad@lemmy.world 12 points 1 month ago (2 children)

Your thumb is an arrow pointing at where you want the screw to go. After you curl your fingers, your fingers are arrows showing the direction to turn the screw

[–] Instigate@aussie.zone 6 points 1 month ago (1 children)

We were taught a similar trick in physics - point your right-hand thumb in the direction that current (or electrons, same same) is travelling and the curling of your fingers shows the direction of the resultant magnetic field that the current creates.

[–] wuphysics87@lemmy.ml 2 points 1 month ago

I teach physics. A prof of mine taught me the right hand rule applies to right handed bolts. No accident they are named that. I teach this to students now. Maybe 1 in 10 like it. The rest prefer their old rhyme. Oh well. Can't say I didn't try

[–] arefx@lemmy.ml 3 points 1 month ago

Got it!

[–] Today@lemmy.world 3 points 1 month ago

I know how to turn a wrench. Knowing the direction is the difficult part. Especially on toilets.

[–] sunstoned@lemmus.org 1 points 1 month ago (1 children)

The only thing I don't like about this is the implication of a left hand rule for left hand threads, which makes my E&M physics brain sad

[–] wuphysics87@lemmy.ml 1 points 1 month ago (1 children)

Multliply bu -1. Same as with negative charge

[–] sunstoned@lemmus.org 1 points 1 month ago (1 children)

Right, for a paper physics problem. Try telling someone to multiply their hand by -1.

[–] wuphysics87@lemmy.ml 2 points 1 month ago (1 children)

Flip your hand over

[–] sunstoned@lemmus.org 1 points 1 month ago

pysic