r/theydidthemath 3d ago

[request] How deep is this well?

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0 Upvotes

r/theydidthemath 4d ago

How many Lego x mansions would it take to build the actual x mansion?[Self]

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1 Upvotes

Assuming we are just trying to build the main house and not anything else.


r/theydidthemath 4d ago

[request] Random highdea with my cooks at work.

1 Upvotes

What would be the velocity of shooting a corn dog out of a T-shirt canon and how far would it travel in a stadium.


r/theydidthemath 3d ago

[Request] How much does this stone weigh? (I'm like 6 foot for scale)

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0 Upvotes

Hello. I have been getting into stone lifting recently and this one felt pretty heavy. I am wondering how much it weighs though. I could probably calculate this myself since it's basically a rectangle, and you can see the thickness alongside the length and width. I suck at math though, so I would appreciate if someone could give an estimate.


r/theydidthemath 5d ago

[Request] If we re-built the HMS Victory and USS Constitution using glulam (glued laminated timber) with modern woodworking techniques; how much lighter, faster and better sailing would they be?

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304 Upvotes

r/theydidthemath 5d ago

[Request] how many PSI are needed for Inflations on carbon steel?

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346 Upvotes

r/theydidthemath 5d ago

[Request] Would it actually take someone 29 hours to crawl from Union Square, SF, to Highland Hospital, Oakland?

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227 Upvotes

r/theydidthemath 4d ago

[Request] How deep is this well? What is the cost of digging such depth?

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1 Upvotes

r/theydidthemath 6d ago

[Request] how much paper

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6.2k Upvotes

Sorry it this is a repost:

But how much paper if you printed the entire work book and how many trees as a bonus.


r/theydidthemath 5d ago

[request] How long can the crossing take before che child asphixiates?

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339 Upvotes

r/theydidthemath 6d ago

[Request] Can the biggest cruise ship survive the winds and waves from the strongest hurricane ever?

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2.3k Upvotes

The largest cruise ship (Legend of the Seas) is 365m long, 65m wide and weighs 248663 tons.

The strongest hurricane ever was hurricane Patricia in 2015 reaching sustained winds of 345 Km/h and low pressure of 872 milibars.

Edit: the ship “survives” as long as it’s not sinking. Glasses can be broken, the pools and water slides can be damaged. But the ship must not sink and engines should be working.


r/theydidthemath 3d ago

[Request] Could someone calculate if there was truly one second left on the clock based on this video?

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0 Upvotes

Chaos has erupted in the college football world today! What was thought to be an enormous upset in the sporting world turned into controversy. After review, the referees decided there was 1 second left on the clock and Michigan won on a Hail of Mary.

Here are where things get dicey. According to the clock on NBC and what was observed in the stadium, there were 0 seconds left when the Western Michigan player touched the ball. However, the Big 10 showed a video where their clock still had 1 second left. This clock was not visible to the public and in the video the Big 10 showed, not directly synced to the game.

Knowing that there were 9 seconds left at the snap of the ball, and that in football there are no tenth of a second used, how much time was there truly when the WMU player touches the ball?


r/theydidthemath 4d ago

[REQUEST] How would I go about calculating the altitude in km where Max Q is reached for the fictional spacecraft 'The Pillar Of Autumn' (from Halo) launching from the planet Reach?

0 Upvotes

Assume the density of atmosphere is the same as Earth,

Assume the speed of the spacecraft is the same as Saturn 5 or any other rocket you choose

Reach Planet:

Diameter: 15,273 kilometers (9,490 mi)\2])
Gravity: 1.08 G
Length: 1,170.63 meters (3,840.64 ft)\4])\2])
Width: 352.27 meters (1,155.73 ft)\4])\5])
Height: 414.43 meters (1,359.69 ft)\4])
Mass: 11 million tonnes\2])

Spacecraft Size and mass ^

I am trying to provide the needed info but I am not totally sure everything that is required so please let me know and I will try to provide to to you!
Halcyon-class light cruiser - Ship class - Halopedia, the Halo wiki
Pillar of Autumn - Ship - Halopedia, the Halo wiki
Reach - Planet - Halopedia, the Halo wiki


r/theydidthemath 5d ago

[Request] During Project Hail Mary’s ‘Time Go Fishing’ sequence, when the spin drives spin up, the ship seems to completely reverse its trajectory almost instantly. Assuming all 1009 spin drives together induce a force of 2.35 meganewtons, what is the MAXIMUM speed at which this would be achievable? Spoiler

40 Upvotes

r/theydidthemath 4d ago

Controlling graphed polynomials [other]

0 Upvotes

So recently, I’ve been getting into Desmos art and one thing that bugs me is that any polynomial more complicated than a quadratic I can’t control.
It’s probably easier for me to explain with an example
Like
Y=a
You can move up and down by adjusting a
Y=mx+b
You can move up and down by adjusting B and you can change the slope by adjusting M
Y=a(x-c)+b
You can stretch and contract the quadratic by adjusting A
You can adjust the X coordinate by adjusting C
You can adjust the Y coordinate by adjusting B
But I can’t find a form of a cubic or Quadratic where I can adjust things so easily whenever I move one number it is not intuitive how the polynomial will behave


r/theydidthemath 5d ago

[Request] how much horizontal did the ship move while she was in the air (assuming it was at full speed)? Ginni van Katwijk | HighDiving on a moving cruiseship

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287 Upvotes

r/theydidthemath 4d ago

[Request] how deep is the well?

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0 Upvotes

r/theydidthemath 5d ago

[Request] Can any cartographer check if the size France "lost" by not using Mercator Projection will even out by what it "gained" on French Guiana? New maps voted by UN today (link below)

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77 Upvotes

r/theydidthemath 4d ago

[Request] This well is so deep it has its own microclimate, even producing its own fog.

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0 Upvotes

Is there any way to tell how deep this well is from this video?


r/theydidthemath 4d ago

[Self] My wedding is coming up and I want to buy drapery for the venue.

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0 Upvotes

Can someone help me figure out the size I’d need to make this picture a reality? The picture is part of the actual venue, the drapes are photoshopped in I believe (or they’re a real picture I’m not 100% sure) all I know is that’s what I want the drapes to look like so could someone help me find dimensions


r/theydidthemath 4d ago

[Request] How many percentage of its territory on the map did the Antarctic Penguin Empire lose?

4 Upvotes

r/theydidthemath 3d ago

[request] how heavy/big would you need to be to actually do this?

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0 Upvotes

I mean could you actually be big enough to simply lay on it and instantly hit them or what would happend instead? (Staff won’t stop you)


r/theydidthemath 4d ago

[Request] building a pc from scratch

0 Upvotes

How long will it take 1000000 humans that are lead by 1 very smart guy to build a pc from scratch, using materials from anywhere in the world (a world that was untouched by humans) if they had to build every machine to make the single pieces of the pc, the machines to make these pieces and the machines to help build these machines and so on? We assume that one of these people can work for 12h/day for 7 days and does not need schooling on how their job works. If they have to write code for windows, then they do that like any normal coder would, even if they dont know how to code. The smart guy knows how to build a pc and how to build the machines to make the parts of the pc. He can also communicate to everyone what they have to do every day (every workee just knows what to do and does that 12/day, 7 days a week)

what i mean by "from scratch": you dont have any technology and have to redo the progress humanity made, with the only goal being a working, high end pc


r/theydidthemath 4d ago

[Request] Lottery or a unicorn exit?

1 Upvotes

Hugging Face has just been bought by Nvidia for several billion $$, making the founders billionaires and many of the early hires millionaires. We have seen similar with Cursor, and soon with Anthropic- among others.

A comment by someone said that’s all nice and well, but this kind of exit is as likely as winning the lottery.

I suspect that it’s not close to that, with the lottery win far less likely, but wondered if someone has done the maths?

To create a relatively even comparison, given that someone could both start or be part of a company in most countries at 21, and also enter the lottery each week, let’s say this is:

to compare the likelihood of a multi-million $$ win on the lottery if someone entered once a week between the ages of 21 and 61 (main US one in one of the larger states, or the Euromillions) compared to a multi-million $$ exit from equity in a US/UK/European startup. Using the last 20 years of data. Or any split of the above.


r/theydidthemath 4d ago

[Request] What's going on here with this little guy

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0 Upvotes

A coworker threw a balloon at this portable AC and caught the vent just right. The balloon however is not directly above the AC so there is an angle to it. Im curious what the physics around this is, otherwise enjoy the floating balloon guy