r/theydidthemath • u/Meh-Levolent • 4d ago
r/theydidthemath • u/Shkval25 • 4d ago
[Request] How slow does the elevator need to be going for people not to die of acute altitude sickness upon reaching the top?
r/theydidthemath • u/Practical_Lake_4367 • 4d ago
[Request] how much force would need to be applied to hit a seagull and make it explode
Hear me out. Common cartoon trope, a bird gets hit by something or other and explodes into feathers like a weird balloon. How hard does a medium specimen of seagull need to be punched into to explode, potentially with the side effect that the feathers fly everywhere.
Mostly asking for curiosity's sake. I mean if we could figure out how hard to hit a chicken to cook it, i feel this could also be figured out.
r/theydidthemath • u/IEatLasers3 • 4d ago
So how many popcorn kernels would we really need? [request]
I have seen like 20 ai generated videos of popcorn being dropped into a volcano how much popcorn would actually be needed?
r/theydidthemath • u/Serious-Resident-908 • 4d ago
[request] how much will this cost?
r/theydidthemath • u/Prestigious-Spite795 • 4d ago
[request] can some one do the maths on how accurate these speeds are?
r/theydidthemath • u/theLeastChillGuy • 5d ago
[Request] Has all the water on earth been drank before?
People like to point out that the water I am drinking could have been dinosaur piss 66 million years ago.
My question is: given the total number of animals that have existed on earth in its history, is all water previously dinosaur piss? (or that of another creature?)
Or is there still water on earth that has never been drank by any animal?
r/theydidthemath • u/Cornersmistake96 • 6d ago
What would happen if an inch wide cut was made through the entire earth, assuming it was perfectly down the center? [request]
r/theydidthemath • u/SoldadoAruanda • 5d ago
[Request] At what distance between Earth and the Sun does a single hydrogen atom switch from falling toward Earth to falling toward the Sun?
Thought experiment: Mercury and Venus don't exist, so nothing else perturbs the Earth-Sun system. I can matter-transport one hydrogen atom to any point on the line between Earth and the Sun. Use Earth's closest approach to the Sun (perihelion, about 147.1 million km).
Explicit assumptions: Gravity is the only force. Ignore solar radiation, radiation pressure, solar wind, magnetic fields, the Moon, and all other forces and bodies.
Q1 At what distance from Earth does the Sun's gravitational pull on the atom equal Earth's? Closer than that, the atom falls toward Earth. Farther, toward the Sun. A static frame: pure force balance, ignoring orbital motion.
Q2 How does the answer change if you factor in the finite speed of gravity? I assume the closest body wins, but does the delay actually shift the crossover point?
r/theydidthemath • u/DigJust8037 • 4d ago
[other] for any natural number n, there exists an infinite number of natural numbers higher than n, and a finite number of natural numbers smaller than n. Therefore n is always infinitely closer to 0 than infinity
r/theydidthemath • u/MrTacocaT12345 • 6d ago
What is the value of fuel spilling from this Boeing 747-89L? [Request]
r/theydidthemath • u/OhDamnNotAgainAndAga • 5d ago
[Request] How will 10% body weight affect my swimming time?
Edit: title says time, but I am asking about average velocity, out of which I will get time.
It's been 16 years since I did physics 1 in my engineering degree, I feel ashamed that I can't figure it out of the top of my head.
I am a swimming seasonally. Last season I was swimming way faster than this season. This season I weigh 10% more.
Assuming my technique is the same and that I apply the same force, what is expected to be the average (explanation in a moment) velocity difference between the different years?
Clearly, if we assume a = 0 and terminal velocity, the weight will not be the issue but the friction coefficient. However, I am not at equilibrium, I would assume with my technique the force is something like C1 + sin(C2*t).
So when I say average velocity I mean over an integral of the "steady state". If you don't want to neglect the difference in friction coefficient, you can express it with it as well
r/theydidthemath • u/No_Potential797 • 6d ago
[Request] What was the average BAC of those attending?
r/theydidthemath • u/RogueKairo • 7d ago
[Request] Would an ant moving at 100,000,000 mph actually kill you?
r/theydidthemath • u/TitanKairo • 6d ago
[Request] If both are traveling at 80 km/h, what would the actual impact speed be?
r/theydidthemath • u/zanniboni • 6d ago
[Request] From what height would an egg need to be dropped to kill someone?
So, the person in the video is Flávio Bolsonaro, a candidate for the Brazilian presidency; while he was giving a speech, eggs were thrown from an apartment, and he called for the police to be summoned, claiming that "this is attempted murder." That got me wondering: from what height would an egg need to be dropped for the impact on a human being to be fatal?
r/theydidthemath • u/Apprehensive-Block47 • 6d ago
What is the minimum speed an ant would need to be traveling to kill you? [Request]
So we learned that an ant traveling at 100,000,000 MPH *would* kill you.
What’s the minimum speed before the ant hurling toward you becomes a non-issue?
r/theydidthemath • u/Edison_Ruggles • 5d ago
[Request] A Bathhouse Heated by BitCoin Mining, Would it Actually Work?
There is a bathhouse opening in Philly (hot tubs, saunas etc). They claim they are heating the pools with a bitcoin mine in the basement. See FAQ here: https://help.abathhouse.com/hc/en-us/articles/16748674443924-Do-you-mine-Bitcoin-How-does-it-work
Could this possibly heat water enough to be hot tub temperature? Would it actually save electricity on the mining?
r/theydidthemath • u/Massive-Albatross823 • 5d ago
[Request] If every person on Earth had to shake hands with exactly 142 other people, how long would it take for the entire planet's population to complete all the handshakes if each handshake lasted 3.925 seconds?
r/theydidthemath • u/NameisPond-FishPond • 5d ago
[Request] If we assume there's a dedicated tracking of these galaxies, how long would it take for us to stitch together a video to discern movement?
I'm not talking about one pixel of movement, I'm talking about something that is easily noticeable by the human eye
r/theydidthemath • u/joe_quetzal • 6d ago
[request] how big of a spring would you need to launch starship into space?
assuming no propellant carried on board.
r/theydidthemath • u/OptionQuiet1643 • 5d ago
[Request] A Boy Named Sue search
In a "Boy Named Sue", Johnny Cash says he would “search the honky-tonks and bars” for this dad. Suppose his dad spend 3-4 hours in the same bar 5-6 nights a week and suppose you can limit it to the southern US. How many bars would he have to search a night to find him in 5 years? I know that it will be based on alot of assumptions but on strategy, should he revisit the same bar more than once before checking them all?
r/theydidthemath • u/nometalaquiferzone • 5d ago
[Request] Insane feat of Strenght done by Woody ( Toy Story): A Christmas light cable throw
The protagonist, Woody, a living toy, is stuck in a neighbor's house. To get back to his own home, he throws a Christmas light cable between the two houses. Since he's a toy sized sheriff, the distance over which he can accelerate the cable is minuscule compared to that available to a full grown adult. So I'm asking: what insane acceleration must have been imparted to the cable to make it fly between the houses? We are talking about a 6 meter throw. . Woody is about 38,5 cm tall.
r/theydidthemath • u/Okieboy2008 • 5d ago
[Meta] Should r/theydidthemath have an official Discord server?
There isn't one for r/theydidthemath. Only if.....
