this post was submitted on 25 Jun 2025
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xkcd #3106: Farads (imgs.xkcd.com)
submitted 1 week ago* (last edited 1 week ago) by xkcdbot@lemmy.world to c/xkcd@lemmy.world
 

xkcd #3106: Farads

Title text:

'This HAZMAT container contains radioactive material with activity of one becquerel.' 'So, like, a single banana slice?'

Transcript:

[Cueball holds a stick while talking with Megan and White Hat.]
Cueball: This stick is one meter long.
Megan: Cool.
White Hat: That's a nice stick.

[Cueball holds a smallish rock.]
Cueball: This rock weighs one pound.
Megan: I'd believe it.
White Hat: Looks like a normal rock.

[Cueball holds a small battery.]
Cueball: This battery is one volt.
Megan: Seems fine.
White Hat: Might need a recharge.

[Cueball holds a capacitor while Megan and White Hat panic.]
Cueball: This capacitor is one farad.
Megan: Aaaaa! Be careful!!
White Hat: Put it down!!

Source: https://xkcd.com/3106/

explainxkcd for #3106

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[–] magnetosphere@fedia.io 9 points 1 week ago (9 children)

I’d be the clueless guy in the room. “I’m not familiar with that unit of measurement.”

[–] pelya@lemmy.world 14 points 1 week ago (8 children)

A capacitor of 1 farad at standard American 120 volts has the energy between 7.62×54 and .50 BMG, and will discharge just as violently.

[–] SalamenceFury@lemmy.world 2 points 1 week ago (1 children)

So what you're saying is that if I touched that in the wrong manner I'd get blown across the room?

[–] pelya@lemmy.world 2 points 1 week ago

Uh yeah, I'm pretty sure the discharge can stop your heart if you grab it in precisely wrong manner. Typical defibrillator uses like 50 times less energy, but with a higher voltage.

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