this post was submitted on 13 Oct 2024
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472
Does each language have "lefty loosey righty tighty"? (lemmy.world)
submitted 2 months ago* (last edited 2 months ago) by vatlark to c/[email protected]
312 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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[โ€“] [email protected] 37 points 2 months ago* (last edited 2 months 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.

[โ€“] [email protected] 11 points 2 months ago (1 children)

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

[โ€“] isyasad 12 points 2 months 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

[โ€“] [email protected] 6 points 2 months 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.

[โ€“] [email protected] 2 points 2 months 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

[โ€“] Today 3 points 2 months ago

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

[โ€“] [email protected] 1 points 2 months 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

[โ€“] [email protected] 1 points 2 months ago (1 children)

Multliply bu -1. Same as with negative charge

[โ€“] [email protected] 1 points 2 months ago (1 children)

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

[โ€“] [email protected] 2 points 2 months ago (1 children)

Flip your hand over