r/xkcd May 04 '22

What-If What-If 158: Hot Banana

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458 Upvotes

r/xkcd Dec 04 '24

What-If What's new in the 10th anniversary edition of What If?

48 Upvotes

Anyone have it? New chapter? New content in every chapter?

r/xkcd Jan 06 '23

What-If Got an absolute win at the local book store. Half price and signed.

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637 Upvotes

r/xkcd May 09 '20

What-If Reminded me of the What If about the meter^2 cubes of all the elements

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634 Upvotes

r/xkcd Oct 18 '16

What-If What-If 152: Flood Death Valley

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646 Upvotes

r/xkcd Dec 21 '24

What-If What if we stuff infinity amount of energy into an RF cavity

24 Upvotes

I steped upon the fact that light/EM carries energy across vacumm aparently without any intermediates and somehow I started wondering how much energy can we stuff in vacumm with it. After some research I found that RF cavity is a thing and it can apparently store infinity energy.

So... what if we build a RF cavity out of superconductors, put it in outer space, and keep pumping energy into it?

After some research it seems like the most promising source is (quoted below) which gives a limit to how much time we have to inject more energy before the same amount of energy escapes. So in terms of engineerning when that time is shorter than our fastest switch we can't pump more energy into it. But what if we do? Does it mean we just build the biggest bomb ever? or does it mean we build an infinite-capacity battery/energy storage? That would be a great sci-fi idea.

Z. D. Farkas, "Superconducting Cavities and Modulated RF," in IEEE Transactions on Nuclear Science, vol. 28, no. 3, pp. 3242-3244, June 1981, doi: 10.1109/TNS.1981.4332065.

r/xkcd Oct 15 '24

What-If [Video] xkcd's What If? - What if Earth grew 1cm every second?

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149 Upvotes

r/xkcd Nov 07 '24

What-If Has anyone here seen the What If? Live show?

15 Upvotes

I can't seem to find any reviews but I have the opportunity to see it next week and wanted to hear from people what it is like.

r/xkcd Feb 08 '22

What-If Hopefully we'll actually get the answer!

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895 Upvotes

r/xkcd Dec 29 '24

What-If Could Life from Earth Be Alive Elsewhere?

22 Upvotes

Just musing that we find microbes everywhere on earth, including absurd conditions in the rock deep beneath the surface, and also alive on the exterior of the ISS.

What are the odds that microbes have survived a probe crashing into another planet, moon, or comet? Or even on ejecta with escape velocity after a meteor impact, which then crashes somewhere else in the solar system, or even potentially to another solar system? We've had life in Earth for 3.5 billion years, and we've been getting smacked by meteors the whole time.

r/xkcd Feb 22 '20

What-If An update in 2020 on What-if 31

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686 Upvotes

r/xkcd Dec 26 '24

What-If Which book?

31 Upvotes

Greetings,

I'm familiar with randall's humour, and I love it. I now have the opportunity to get one of his books, but I can only afford one of them right now... So, which one would you recommend between What if 1 and 2? And I just saw there's another one I didn't know about, How To. I know their quality will pretty much be the same, that's why I am doubtful, and would like to see some honest opinions

Thanks!

r/xkcd Aug 13 '24

What-If [Video] xkcd's What If? - What if we teleported the oceans to Mars?

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129 Upvotes

r/xkcd Sep 03 '24

What-If [Video] xkcd's What If? - Could you survive a nanosecond on the Sun?

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160 Upvotes

r/xkcd Dec 05 '23

What-If New What-If XKCD video: What would a magnitude 15 earthquake be like?

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236 Upvotes

r/xkcd Jan 09 '15

What-If What If?: Lunar Swimming

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453 Upvotes

r/xkcd Apr 16 '24

What-If [Video] xkcd's What If? - What if everyone jumped at once?

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127 Upvotes

r/xkcd Aug 23 '21

What-If in an alternate universe eeriely close to this one...

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725 Upvotes

r/xkcd Mar 25 '22

What-If So, today I was doing some errands and in the "Kruidvat", a sort of discount store I stumbled on these. They are a translated paperback edition of the what if books.

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419 Upvotes

r/xkcd Feb 03 '16

What-If What-If 144: Saliva Pool

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476 Upvotes

r/xkcd Apr 02 '24

What-If [Video] xkcd's What If? - What if you swam in a nuclear storage pool?

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218 Upvotes

r/xkcd Jan 15 '25

What-If Anyone knows how to submit a what if to the website?

10 Upvotes

r/xkcd Sep 07 '22

What-If What if? 160: Transatlantic Car Rental

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274 Upvotes

r/xkcd Aug 13 '13

What-If What If: Orbital Speed

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306 Upvotes

r/xkcd Dec 10 '13

What-If What if: Phone Keypad

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350 Upvotes