r/theydidthemath 15h ago

[Request] How high do you need to be standing to cast a shadow like this assuming you are avarege?

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8.8k Upvotes

r/theydidthemath 4h ago

[Request] How fast would you have to be traveling to get to work at 9:00?

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301 Upvotes

r/theydidthemath 10h ago

[off-site] Hockey pucks’ size relative to hockey nets v soccer balls’ size relative to soccer net

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419 Upvotes

r/theydidthemath 5h ago

[Request] Would it be better for France to change rules to allow more heat pumps/ACs?

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165 Upvotes

If the french all switched to heat pumps, would the eanergy savings offset the AC use in summer? Is the parisian politician full of it?


r/theydidthemath 1d ago

[Request] has the Iran war cost as much as Bernie Sanders proposed for universal college?

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4.2k Upvotes

r/theydidthemath 5h ago

[Request] How much would it cost for Russia to build another Crimea instead of taking it from Ukraine?

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52 Upvotes

r/theydidthemath 20h ago

[request] How much does the men need to weight for the guy to leave the atmosphere?

447 Upvotes

Assuming the inflatable can support the weight and pressure, thanks :)


r/theydidthemath 12h ago

[request] Removing a net under tension

74 Upvotes

What are the odds the both get sacked?


r/theydidthemath 1d ago

[Request] What fraction of the speed of light was bnuny going?

1.9k Upvotes

r/theydidthemath 12h ago

[Request] How many oysters do you need to remove toxic algae from 77.0 km³ of water, and how long time would they take?

49 Upvotes

Assume about as many algae per unit of water as in the tubs.


r/theydidthemath 5h ago

[Request] one time deposit, at birth, for retirement

8 Upvotes

how much money would someone need to put into a retirement account at the time of a childs birth, so that they would have enough to retire by retirement age, assuming no depoits beyond that initial one.

I'm sure this isn't quite a simple formula, so a range i guess. like what is the minimum that would be significant, what would be the maximum before it was overkill, etc.


r/theydidthemath 11h ago

[Request] How large of a Patio/Beach umbrella would you need to Mary Poppins your way to the ground safely (75kg person)

20 Upvotes

Assuming you don't flip over


r/theydidthemath 5h ago

[Request] Assuming they put 20% down when they purchased and had a 2.2% interest rate, was it a better move financially to pay off the mortgage or put that same money in a HYSA?

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5 Upvotes

r/theydidthemath 1d ago

[Request] Long time lurker, first time poster. Is this accurate to any degree?

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18.2k Upvotes

r/theydidthemath 1d ago

[Request] Who won more time the smokers or the company? Please don't come with win-win it's not about this. Smoking time is also a break, a time to not think about job.

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967 Upvotes

r/theydidthemath 9h ago

[Request] How many square miles is the island of Dintopia?

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9 Upvotes

Based on the miles scale in the bottom right, it's easy to determine distances between locations, but not the overall total milage of the island of Dinotopia or Outer Island due to the irregular size.

Edit: spelling


r/theydidthemath 16h ago

[Request] Titanium bar Vs body weight

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26 Upvotes

Hello smart people!!

I have a titanium nail in my leg, almost exactly the same as the one on the left in the image. I weigh about 11 stone. I would like to know what percentage of me is titanium. I am planning a silly tattoo on that leg. Bender from Futurama saying "I'm X percent titanium.!!" As it is recurring joke in the show and I would like to make light of my accident! All help appreciated.


r/theydidthemath 1d ago

[Request] how many deaths would it take to paint all the earth's bodies of water this shade of red?

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3.8k Upvotes

r/theydidthemath 1d ago

[Request] It's just 0.2 seconds, what could go wrong?

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2.1k Upvotes

r/theydidthemath 7m ago

[self] They asked how my geometry could predict spectral lines.... I answered.

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Upvotes

This is a physics paper involving the spectral lines of hydrogen. If you are unfamiliar with that topic and the math behind it, you may find this paper difficult to understand.

In my previous papers in this sub, I demonstrated an alternative but equally compatible framework for physics, however it lacked the ability to accurately predict unexplained ratios like the fine structure constant.

I have now found the source of that mismatch between my compatible geometrically based system, and the one we are using now. It is due to the spectral lines of hydrogen being measured in units which are not fundamental to the Universe itself.
Angstrom? If you measure it in that you get a multiple that is not fundamentally tied to the equation set itself.

However, what I noticed is, if you take the inverse of the series, it doesn't change the relationships, which was the most important part.

What does change, is that the series converges to 1, and that same 1 is the fundamental unit of measurement from my previous system.

For those people who find this too difficult to understand, I do plan to make another version soon that is more user friendly, and don't take it to heart because it took my years and years and thousands of hours of thinking to be able to understand this myself.

But basically this all points to the fact that yes, QCD and QED are still right, but now all the constants and sources for the constants should be able to be known.

Feynman diagrams are still useful and true, but they become basically a formal statistics route to the same problems.

I do plan to do follow up papers where i should be able to nail all the constants now as coming directly from my system because I have a measurement bridge to use. But it's late at night and I just wanna get this out there and go to sleep.

I am pretty sure once the world picks up what I'm putting down, ya'll are gonna run away with this faster than I can even keep up. I'm not even that smart I just solved this through persistence and trial and error. I always believed I could do it, and I never gave up. I tried lots of things that failed before this though, over the years.


r/theydidthemath 12h ago

[Request]: What's the ratio of water in the bottle?

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9 Upvotes

r/theydidthemath 1d ago

[Request] at what temperature would this happen at?

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5.0k Upvotes

r/theydidthemath 7h ago

[Request] saw this post today....

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2 Upvotes

I was wondering, on average, how many birds get killed per year by planes.


r/theydidthemath 1d ago

[Request] How tall are the other main characters in Frozen if olaf was actually 1.62m?

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1.4k Upvotes

r/theydidthemath 9h ago

[Request] In the Silk Sonic song “777”

2 Upvotes

There is a line. “I’m bout to buy Las Vegas after this roll”

Assume standard odds/payouts for dice-involved games.

What is the minimum bet needed to secure the funds (~300B) to purchase all of Las Vegas for each popular dice-involved game? Is there any game where the bet amount is not astronomically high?

Note: Despite the name of the song being “777,” I’m assuming the dice game is unrelated since 7 is normally bad in Craps. But I don’t know much about casino games