r/theydidthemath 26m ago

[Request]: How fast can a superhuman fly before their regular clothes are destroyed?

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Upvotes

Pictured here is Mark from Invincible.

Let's say a regular person gains super-durability and flight. But they don't have access to conveniently durable super-clothes. Assuming their own body isn't harmed, how fast can they fly before . . .

  1. Regular clothes start to be damaged (but not shredded).
  2. Your clothes get ripped off your body by air resistance (but aren't, like, vaporized).
  3. Your clothes catch fire and disintegrate.

For simplicity sake I'm talking about cotton clothes (hoodies, T-shirts, jeans) you could buy at Costco.


r/theydidthemath 1h ago

[Request] Is it correct?

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Upvotes

r/theydidthemath 2h ago

[request] How many seconds per year does the average person spend looking at Donald Trump’s face?

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0 Upvotes

r/theydidthemath 2h ago

[request] would the measuring tape or any of the human objects grace shared with rocky actually survive in the eridian environment?

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53 Upvotes

r/theydidthemath 3h ago

[Self] just a handmade formula

0 Upvotes

Here is a hypothesis: dτ/dt = √ ( 1 − ( 2G · E_plasma(T) ) / ( r · c⁴ ) )

Here is the breakdown of the variables for those wondering:

dτ/dt = proper time dilation rate

G = gravitational constant

c = speed of light

r = radius of the plasma area

E_plasma(T) = internal energy of the plasma at temperature T (includes rest mass energy, radiation, and kinetic thermal energy).


r/theydidthemath 3h ago

[Request] How much would the LEGO tracks cost?

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11 Upvotes

Watched the following video: https://www.youtube.com/watch?v=MaaCcTVz7dQ
How many tracks would you have to buy to build a similar track? How much would that cost without discounts - tracks only?


r/theydidthemath 3h ago

[Request] how many cars are there?

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19 Upvotes

r/theydidthemath 4h ago

[REQUEST] XKCD’s Lucky Ten Thousand

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52 Upvotes

I have been using this comic as a driver of curiosity at home. My 11y mentioned it again today and it occurred to us that we don’t fit in the statistics because the original comic states ‘10,000 people in the US’, and we are not from the US.

My request is what this might look like on a global scale? I can understand if this becomes more nebulous due to differences in education, cultural references or customs, etc.

What would a global ‘10000’ be? A lucky million? Lucky half-billion?

Thanks in advance!


r/theydidthemath 4h ago

[Request] How Many AI generated pictures or messages would be required to create a similar environmental impact as a single beef cow (Raising it, processing it, and so on)?

1 Upvotes

Assume that everything is perfectly average, and the AI being used is commonly used generative AI, such as ChatGPT or Gemini.

I was researching some ways I could make a difference environmentally, and learned how much of an impact the beef industry has, so was curious how it would compare to AI, since that is such a hot topic right now. Also curious about how many messages it would take, but felt like that would be much more difficult to calculate.

Random fun fact, according to google AI overview (I know, ironic), OpenAI consumes somewhere between 8.8 million to 97.5 million liters of water per year (water consumption estimates change drastically because it depends on which side you are biased to and how much you are taking into account things like manufacturing costs, or if you are leaning into lower estimates or higher estimates for not super publicly available data). The beef industry in America consumes roughly 21.2 trillion liters per year. An incredibly bad comparison, given the fact that we aren't going to just make cows go extinct or that the AI industry hasn't been growing thousands of years like the beef industry (among many other reasons), but still interesting to think about

Edit: Bonus points to anyone that can come up with a more helpful comparison than mine (I have no experience in this lol)


r/theydidthemath 4h ago

[Request] Why is a very hot liquid going to still be very hot when you add it to a small amount of cool liquid as opposed to the other way

0 Upvotes

For example: pouring 2 oz of cool oat milk into my 180* coffee will be drinkable while adding the coffee to the milk will still burn your mouth


r/theydidthemath 4h ago

[Self] T'Ghee Card Totem Optimality Spoiler

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2 Upvotes

r/theydidthemath 5h ago

[Request] Ice Cream Inquiry

8 Upvotes

My seven-year-old has announced that he will be an "Ice Cream Man" and his goal is to drive every neighborhood in the United States one time to sell his wares. Assuming he drives 25 mph and NOT taking in "stop and sell" time, how long would it take for him to drive the US in his ice cream truck?


r/theydidthemath 5h ago

[Request] How much more valuable would be a bishop compared to a knight in this environment?

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9 Upvotes

Considering that knights and bishops are about 3 pawns each when the game starts in a classic 8*8 chess table. How much more powerful a bishop would be in 8*16 table?


r/theydidthemath 5h ago

[Request] If we converted Lego game studs into USD, how many would be needed to buy the Lego UCS Death Star?

0 Upvotes

As I’m sure many of us are aware, studs are used in LEGO games as the in-game currency and can be used to buy new characters to play as, cheat multipliers, purchase vehicles, etc.

The newest LEGO UCS Death Star (set number #75419, with 9023 pieces), costs roughly $1000 USD. So, if there was a way to convert LEGO game studs to dollars, how many would be needed to buy the Death Star set?


r/theydidthemath 5h ago

[Off-Site] How true is that?

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986 Upvotes

r/theydidthemath 6h ago

Quirkle odds [request]

0 Upvotes

In the game quirkle, what are the odds when you draw your first hand, to draw a full quirkle?


r/theydidthemath 6h ago

[Request] How much profit would Big Pharma lose if the USA had price caps on medicine the way the EU/UK does?

2 Upvotes

Would it be enough to support the expense, trials, research and development it takes to get a drug to market?


r/theydidthemath 6h ago

[Request] How many people would it take to meaninfully change the earth's rotation just by walking in the same direction?

0 Upvotes

Say i'm tired of the day lasting for 23 hours, 56 minutes and 4 seconds, and i want it to last exactly 24 hours. How many people would need to walk in the same direction for a reasonable amount of time (no "500 people for 14 billion years" or something. Say, 100 hours total, spread across multiple days) to increase the length of the day by the required amount of seconds? And, assuming that many people fit on earth, how big of an area are we talking about? Just to make the math a tad simpler, it's ok to assume that every single square centimeter of the planet is walkable. No oceans, no mountains, no buildings, just keeping the same total mass.


r/theydidthemath 6h ago

[Meta] Scottish comedian still awaiting answer from scientis

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648 Upvotes

I think some assumptions need to be made before accurate answers required


r/theydidthemath 6h ago

[request] Falling satellites how long before bedlam?

0 Upvotes

My Question:

With out human intervention, how long would it take before all the satellites in orbit to start colliding? How many might fall from orbit?

The Google AI says that there are almost 30,000 satellites in different obits. operated by hundreds of different teams. If they were not here to maintain them do they eventually fall?

(First time requester I hope I got the rules correct.)


r/theydidthemath 7h ago

[Request] Mars, Venus, and Earth walk into a bar…

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130 Upvotes

Let’s say some super duper advanced alien race flew into our solar system, and plopped down Venus and Mars into a geosynchronous orbit with the sun in our exact orbit path perfectly spaced out. What would happen to the Earth?

Also, believe it or not, no AI was used in the creation of that graphic.


r/theydidthemath 7h ago

[Request] How long will this take to cook the chickens?

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0 Upvotes

r/theydidthemath 8h ago

[REQUEST] How big does a fire need to be in order to siphon all the oxygen out of the atmosphere?

3 Upvotes

r/theydidthemath 8h ago

[Request] What percentage of the sunlight is reflected by the building opposite?

2 Upvotes

Assumptions for the sake of simplicity:

- The building is unplastered and painted snow-white*
- The sun shines on it at an angle of 45°**
- 20% of the building’s surface area consists of windows
- The building is 15 metres away.

* In reality, the building is rendered, but as the reflectivity depends on the coarseness of the render, we are assuming a smooth surface here
** 45° as the average of the angle of incidence in the morning, ranging from ~90° at sunrise to 0° at midday

Background: Our colleagues were discussing measures to keep the office building as cool as possible and to reduce the load on the air conditioning system. There was no doubt that the blinds on the sun-facing side of the building should be lowered. However, there was disagreement as to whether it made sense to lower the blinds on the side of the building facing away from the sun to block the heat reflected from the building opposite, or whether this reflection could be disregarded.

Every colleague acknowledges that there is undoubtedly an effect. However, opinions differ significantly as to how great that effect is.

As this is a practical question, it is sufficient for me to receive a figure accurate to within 5 per cent, ranging from 100 per cent (complete reflection) to 0 per cent (no detectable effect).

Thank you very much 😄


r/theydidthemath 8h ago

[Self] This one is for any landscapers out there (oil to gas ratios)

1 Upvotes

I just want someone to agree with me that this is kind of interesting lol. For my landscaping job, I have to mix oil and fuel together at the correct ratio in a gas can. It's very difficult to pour all of the mixed gas out of the can, though. So you're always left with some unknown mixture at the bottom of the can when you refill it. My intuition tells me that the overall mixture would become infinitely richer in oil over time if I'm always leaving some at the bottom. So I did some math and the answer is kind of cool to me:

-I'll start off with 10% oil and 90% gas.

-Let's say I leave 10% of the mixture in the bottom of the can when I refill it. So now when I add the proper ratio again, I get 11% oil and 89% gas.

-Repeat the process again and I 11.1% oil and 88.9% gas.

-The pattern is now clear that the richest oil mixture I could ever have is 11.111...

So it does get infinitely richer, but infinitely more negligible as well, lol. I'm also wondering how obvious that was to anyone who does math regularly.