this post was submitted on 13 Oct 2024
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474
Does each language have "lefty loosey righty tighty"? (lemmy.world)
submitted 1 month ago* (last edited 1 month ago) by [email protected] to c/[email protected]
315 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 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.

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

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

[โ€“] [email protected] 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

[โ€“] [email protected] 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.

[โ€“] [email protected] 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

[โ€“] [email protected] 3 points 1 month ago

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

[โ€“] [email protected] 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

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

Multliply bu -1. Same as with negative charge

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

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

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

Flip your hand over