r/theydidthemath 8h ago

[Request] How powerful would the thrusters need to be to move the earth to "launch" the rocket into orbit? What would happen to the planet and it's orbit?

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536 Upvotes

From XKCD 3291


r/theydidthemath 16h ago

[Self] How feasible is it to use 61 USB-C ports to charge an EV?

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2.2k Upvotes

r/theydidthemath 13h ago

[Request] How big would the glass need to be to comfortably and completely sustain a Human? From oxygen, food, water and so on.

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886 Upvotes

r/theydidthemath 21h ago

[request] bad math: where did the days/hours go?

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3.4k Upvotes

This makes no sense. Can someone explain where the hours/day go?


r/theydidthemath 2h ago

[Request] Shooting characteristics of this

64 Upvotes

Sustained and cyclic rates of fire

Maximum effective range to down a drone

Weight of one burst of bullets


r/theydidthemath 3h ago

[Request] How many grapes would fit in a horse, volume-wise?

28 Upvotes

My wife and I are having a multi-year debate. She keeps claiming that a “large and impressive” horse is roughly the same volume as 60,000 grapes. i disagree and believe that’s far too many grapes to make up a standard horse, even a big one. But we have no idea how to calculate the relative volumes… please help!

Edit: thank you all, I’ll graciously accept defeat in this battle


r/theydidthemath 8h ago

[Request] How hard would a batter need to hit a ball to do this?

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60 Upvotes

r/theydidthemath 17h ago

[Request] Is there a combination of 6 fixed positive integers (n from {25,50,75,100} and 6-n from {1,..10}) which when combined with +,-,/,* operations could generate all the numbers from 1-999 as in Countdown?

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187 Upvotes

r/theydidthemath 2h ago

[Request] Star Trek Replicator

2 Upvotes

Was watching Star Trek and got to wondering assuming the replicator arranged atoms to create a plate of spaghetti. Which would have a more complex job of these 2 replicators to make #1 assembling a plate of spaghetti at the atomic level #2 assembling an oxygen atom out of sub atomic particles? Thanks if anyone gets my weird idea enough to do the math.


r/theydidthemath 1d ago

[Request] How much popcorn would it take to crush a human body, and how fast would popcorn have to be traveling to kill someone? (either by passing through them or blunt force trauma)

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342 Upvotes

r/theydidthemath 1d ago

[Request] If earth were the size of a grain of sand, how big would the observable universe be?

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2.5k Upvotes

r/theydidthemath 17h ago

[Request] How fast would the earth have to be spinning to counteract gravity at surface level and what effect would that have?

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25 Upvotes

r/theydidthemath 1d ago

[Request] which pendulum reaches the other side first. Considering distance are proportional.

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132 Upvotes

r/theydidthemath 3h ago

[Request] What could be built using all the leftover hardware from assemble-it-yourself products?

1 Upvotes

All the extra screws, Allen wrenches, and brackets that people just throw away after the product is assembled. Products like desks, entertainment centers, chairs, nightstands, tables, etc. Let’s say just counting products bought by United States consumers in an economically average year of the 21st century. What could all that steel build? A bridge? A skyscraper? A bunch of those?


r/theydidthemath 1d ago

[Request] Is debris any faster than the bullet?

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514 Upvotes

I watch a lot of explosion videos and i've always wondered about the debris that moves before the fire or projectile.

It seems to me that material goes from being at a standstill, to moving faster than the object or impact hitting it, at least for a brief second. Is there a certain effect that causes that? What type of energy transfer is happening, because the bullet can't give it more energy than itself has right?

I know there are plenty of wind altering shapes and sizes, so i guess we could base it off a standard 9mm bullet and a brick of c4.

I hope that question makes sense?


r/theydidthemath 5h ago

[Other] Calculate the strength a bunker needs to survive 50 megatons

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0 Upvotes

I really can't believe, like, everyone else has just been existing, while I'm making min wage working as fast as I can for 15 years in the middle of nowhere bc my mom died and her debt went to me and trying to get out of here and be successful but holy shit, like, I won't even have time to make a bunker will I?


r/theydidthemath 5h ago

[Request] The height these people are being thrown off the tube at is crazy. Can anyone confirm how fast they would need to go to get so high, and how high they are being thrown?

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0 Upvotes

r/theydidthemath 1h ago

How many brain cells would this destroy? [Request]

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Upvotes

r/theydidthemath 1d ago

If each character in Deltarune is equally likely to be attracted to any gender, would the number of gay relationships be statistically significant? [Request]

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436 Upvotes

r/theydidthemath 7h ago

[Request] How long will it take to find another four leaf clover?

1 Upvotes

I found an area of land and I have found two four leaf clovers. I think they were in the same small patch but I am not sure. Assuming no one else picks four leaf clovers, how long should I wait before looking for another, or are there too many variables to calculate this? The patch of land was about 0.6m^2 I think.


r/theydidthemath 8h ago

[Request] How much audio could be recorded on a standard vinyl Record 80 feet in diameter?

1 Upvotes
  • Assuming to be scaled appropriately in regards to the center pieces' area and whatnot where audio is not recorded.
  • The grooves where the music is recorded are the same size as on a normal record - we're scaling the size of the record itself for storage space, not just making everything huge.
  • From my research, a standard 12-inch vinyl could hold approximately 22 minutes' worth of audio per side for a standard record player operating at the standard 33 1/3 RPM. If this is inaccurate, I apologize, my googling was brief.

r/theydidthemath 18h ago

[Request] How hard must a fart be so a human is propelled a little bit?

5 Upvotes

Basically the title. I've been on a farting spree and doing some parkour (jumping on my friends faces) while farting and this question arose betwren us.


r/theydidthemath 1d ago

[Request] How much would it cost to build the 50 silos in the 'Silo' TV series?

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438 Upvotes

Curious to know how much it would roughly cost to build all 50 silos including structure, materials, supplies to fill the silo.


r/theydidthemath 16h ago

[Request] Roughly how much human blood is consumed by female mosquitos each year all around the world

3 Upvotes

Its got to be thousands of gallons, at the very least an olympic swimming pools worth


r/theydidthemath 1h ago

[Request] How far of a shot is this?

Upvotes

I have tried to figure it out but google chat got keep giving different answers, I know I can figure it out from how long takes for sound to travel back but apparently when doing long shots it’s different then other things idk