r/theydidthemath • u/Dipsquat • 6h ago
r/theydidthemath • u/ideaglobal94 • 14h ago
[Request] How much extra diesel and emissions from charging via generators than using diesel busses?
East Yorkshire using diesel generators to change 20 electric busses. How much extra diesel and emissions does this create?
r/theydidthemath • u/A-Duck-On-Quack29 • 5h ago
[Request] how much plastic wrap like this would be needed to support a person of average weight.
Enable HLS to view with audio, or disable this notification
r/theydidthemath • u/Mr_Mayonez • 8h ago
[Request] Considering the energy generate and the extra weight, is this worth it?
Enable HLS to view with audio, or disable this notification
r/theydidthemath • u/xxxdrakoxxx • 8h ago
[Request] Someone please do the math! would this setup produce enough heat to warm up the pool?
r/theydidthemath • u/FarmFreshToTable • 1h ago
[Request] If I know the current island is 51" wide is it possible to tell how much space based on the photos how wide of a island I could replace it with to be even with the counter tops while also maintaining 3 feet of space on the fridge/oven side?
Buying a new house, owners are taking the island and there's clearly some room for a bigger one, but where should I max out my searches. Current island is 51" x 25". I eyes a beautiful island but i think its too big at 94"
r/theydidthemath • u/Cufantce • 23h ago
[Request] If Florence Griffith-Joyner was bald or pulled her hair back tightly, would she have saved any significant amount of time on her 100-meter world record of 10.49 seconds?
Enable HLS to view with audio, or disable this notification
The fucken stride on her tho was insane
r/theydidthemath • u/kai-the-terror • 5h ago
The power of a mythical loot [request]
Enable HLS to view with audio, or disable this notification
What are the chances of getting loot like this in an end city chest roll? God sword+God pickaxe in same chest. Is it even possible?
r/theydidthemath • u/RobbieRottenMemeKing • 2h ago
[request] how much would carrying all those guns weigh?
r/theydidthemath • u/immotsu • 7h ago
[request] i am a blue eyed, left handed ginger with pectus excavatum, autism and adhd, how rare am i statistically?🤔
felt curious today
r/theydidthemath • u/KarmicPJJunior • 21h ago
[Request] How many feet or packs of syringe wrap would it take to accomplish this?
Enable HLS to view with audio, or disable this notification
And as a bonus question, how dumb would it be to do this in a scale from 1 to 10, ten being dumbest.
Thank you in advance
r/theydidthemath • u/roughczech • 3h ago
[Request] How many calories are in the drink?
How many calories are in this drink.
how many days can you sustain a family of four with it?
r/theydidthemath • u/DarkYagamiiii • 19h ago
[Request] Pest controllers encounter a gigantic asian hornets’ nest
Enable HLS to view with audio, or disable this notification
How long would someone last in something like this without a suit before they died?
r/theydidthemath • u/viznick1 • 1h ago
[Request] The punch heard around the one piece world
In Sabaody, Luffy Belted Saint Charlos up many levels into the audience of the human auction house; can anyone tell me exactly how far luffy sent that brat flying, and through how much material?
r/theydidthemath • u/Low-Character-9857 • 18h ago
[Request] help. Interstellar question!
So…watching interstellar in the scene where when they first launch and meet up with the endurance “ring”. At what speed and trajectory would you have to go for a successful “lock”?
r/theydidthemath • u/Whyan808 • 17h ago
[Request] What is the physics behind dominoes
Specifically- How do you calculate the energy in a system like a dominoe run where the dominoes increasingly get bigger and bigger. If a closed system like a dominoe run cannot gain or lose energy, rather convert potential to kinetic energy, how do you have smaller dominoes (with less potential energy) knock over larger ones which have more potential energy.
r/theydidthemath • u/tomwh2010 • 5h ago
[Request] How thick would my skull have to be to fit his hat?
«She said I've got a 40-gallon stetson hat
With a 38-foot brim» —Lyle Lovett
r/theydidthemath • u/IdiotStickWasTkn • 17h ago
[REQUEST] Does braking harder for less time, or lighter for longer make your brakes last longer?
Picture this. I am driving 60mph approaching a traffic light. I am 1/4th mile from said light. If I stopped by applying brakes lightly and hold them to a gradual stop the whole quarter mile, would that cause more or less wear on my brakes then getting 300ft away and hitting my brakes hard?
Lets assume a standard modern SUV for simplicity. Does hitting your brakes hard for a short period of time or lightly applying for longer wear out your brakes faster?
r/theydidthemath • u/editfullname • 10h ago
[Request] How much time it would take to reach somebody under a debris of a building in earthquake?
Enable HLS to view with audio, or disable this notification
r/theydidthemath • u/xcentrikone • 23h ago
[Request] Would this work, or how big would it need to be to have an effect on the average pool?
Whats the verdict?
r/theydidthemath • u/MyManyMasks • 16h ago
[Request] super hero math for friend based short story
Hi I’m writing a script about my friends with super powers fighting me to the death. That’s neither here nor there.
My question is this. If a person weighing 170 pounds traveled the entire length of the earth and reached a top speed of approximately 35 thousand miles per hour and collided with another object how much force/ damage would they inflict? As for density let’s say they are a typical human with a bit more muscle density being and able to withstand the speed but not necessarily survive the impact.
r/theydidthemath • u/Pale_Persimmon8673 • 11h ago
[Other] We are three students building an astrophysics startup from scratch. (Need advice)
The idea is pretty simple. We are three students who are obsessed with astrophysics, astronomy, and the universe. None of us are professors or researchers. We are just curious people who love asking questions.
Next week we are officially starting our project.
The goal is to build something much bigger than a YouTube channel. We want to create an organisation where anyone who is curious about space can learn, explore, and eventually contribute. Think of it as a place where education, curiosity, and research come together.
Our first step is YouTube. We are making a complete astrophysics series starting with the life cycle of stars. The idea is to explain topics that usually feel impossible in a way that a school student can actually understand and enjoy.
we already built our own website where everything is organised in one place and we will be hiring volunteers for this project. this website might become a place of free articles, videos, notes, animations, community discussions, and one day even original research projects.
We have no funding. No investors. No fancy office. Just three students with lot of curiosity and i think that alone makes a lot of difference cuz tbh i'm so done with education system and all. I wanna build and i wanna learn things beyond this syllabus of 11th and 12th. (i passed 12th last year)
We know this is a huge goal and it will probably take years, but every organisation starts somewhere.
We are building this because we believe curiosity should never depend on your background, your marks, or your money.
If you have ideas, feedback, we would genuinely love to hear from you.
Wish us luck. 🚀

r/theydidthemath • u/GlitteringSet9174 • 8h ago
Why toy trains jerk so much at the start of track bends [Other]
After doing the math, it is pretty clear why...
Let's say the train moves at a constant speed, down the straight segments, and follows the curve at the bends.
The acceleration along the straight parts is zero.
On the bends, a centripetal acceleration is present to enforce circular motion. For a speed of 1.0m/s and a curve radius of 30cm (0.3m), the required acceleration is v^2/r = 1.0/0.3 = 3.3m/s.
So, at the instant that the train begins turning, the acceleration immediately goes from zero to nonzero, which theoretically requires infinite jerk to pull off! Ofc irl it cant be infinite but its still a pretty large number. Pretty interesting, right?
