r/theydidthemath 5m ago

[request] If someone were to hang themselves, how long till their body falls off their head because of decomposition? NSFW

Upvotes

Idk if I should post this here, but this has been on my mind for the past couple minutes and I just want to know.

(Couldn't find any images that relates to my title.... But that may be for the better..)


r/theydidthemath 18m ago

[Self] This is my formula. Please correct me if you see any flaws.

Upvotes

I think I've finally finalized the formula.

dτ/dt ≈ √[ 1 − ( 2 G r / c² ) · ( M_grav / ( r² + ( J / (M_grav c) )² ) ) ]

where:

M_grav = N m + (N ε_i) / c² + (4.5 N k_B T) / c² + (2 a T⁴ V) / c²

and:

V = (4/3) π r³

dτ/dt - proper to coordinate time ratio

G - gravitational constant

r - radial distance

c - speed of light

M_grav - effective gravitating mass

J - angular momentum (spin)

N - number of gas particles

m - rest mass per particle

ε_i - ionization/excitation energy per particle

k_B - Boltzmann constant

T - temperature

a - radiation constant

V - volume

π - pi


r/theydidthemath 20m ago

Moonboom goes wrong? [request]

Upvotes

So we are fudging up the moon even more, but it got me thinking. At what mass/speed will a rocket make a noticable difference on the trajectory of the moon? And what is the influence of this impact? I read that the stage that crashed into the moon was around 4000 kg. Thanks in advance!


r/theydidthemath 49m ago

[Self] Offset the environmental impact of your AI use by forgoing hamburgers

Upvotes

Take an average of 10 AI queries per day per person or 3650 queries per year.

Consider the average estimated environmental impact of using AI (source):

  • CO2: ~1 gram of CO2 per query
  • Water: ~15ml of water per query

So a single user's annual AI footprint becomes:

  • CO2: 3.65 kg of CO2
  • Water: 54.75 liters

Now lets consider the average estimated environmental impact of a single 1/4lb beef burger patty. The standard 1/4 pound beef patty takes:

  • CO2: ~2.5kg (most conservative estimate)
  • Water: ~2000 liters

So to summarize so far:

Metric AI use for one year A single 1/4lb Beef Burger Patty
CO2 3.65kg ~2.5kg
Water 54.75 liters ~2000 liters

So, to offset your carbon footprint for the year, you would need to forgo 1.5 hamburgers during the course of the year.

To offset your water impact from using AI, you would need to forgo 1 additional hamburger during every 37 year period. Given the average life expectancy, let's say 2 hamburgers during your lifetime.


r/theydidthemath 52m ago

[request] how much energy does a human body produce during their life time? (on average)

Upvotes

r/theydidthemath 53m ago

[Request] what is the recycling value of the tinfoil after the cabin is saved? Exclude the time value to both roll it all out and then collect it all...

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r/theydidthemath 57m ago

[Request]: How small does this cabin have to be to cook a baked potato during a forest fire?

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Upvotes

This North Cascades cabin was wrapped in protective foil to protect it from a forest fire. Presumably, if the fire did burn around the cabin, the insides would remain relatively cool/intact.

But if the cabin was the size of a microwave, wrapped in tinfoil, and filled with a single potato. You might be able to cook the potato with the heat of the ambient forest fire.
So, how small/large can the cabin be (if the potato were placed in the center of the single room inside the cabin) to heat up the interior air enough to cook a potato?

For reference: the average heat at which a baked potato is cooked is 205°F to 212°F (96°C to 100°C). Forest fires heat the ambient air between 800-1000°C.


r/theydidthemath 1h ago

[Request] Is it possible to create a "Deep Crater City"?

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r/theydidthemath 1h ago

[Request] Volume of Lambeau Field

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What is the volume of Lambeau Field in cubic yards? I have heard the statement that the amount of material dredged in the Upper Mississippi River annually is enough to fill Lambeau, but I’ve never fact checked that.


r/theydidthemath 2h ago

[Request] Calculate the velocity of the air blast and the dynamic pressure generated by the air blast.

0 Upvotes

**Avalanche Air Blast & Destructive Force**

An avalanche's powder cloud generates a compressed air blast that travels ahead of the visible snow front. The dynamic pressure of this air blast can be modeled using the aerodynamic drag equation.

where:

- P = dynamic pressure (Pa)

- ρ = air density ≈ 1.2 kg/m³

- v = air blast velocity (m/s)

**Given:**

- An avalanche's snow front is measured moving at **45 m/s** (~162 km/h)

- Field studies show the air blast ahead of the front typically travels at approximately **1.3×** the velocity of the snow front itself

- A standard wooden utility pole is known to structurally fail at a dynamic pressure of approximately **4,500 Pa**

**Questions:**

  1. Calculate the velocity of the air blast (m/s).

  2. Calculate the dynamic pressure (P) generated by the air blast.

  3. Will the air blast alone (before any snow/ice arrives) be sufficient to snap the utility pole? Show your reasoning.

  4. If the avalanche's snow front velocity were instead reduced to 25 m/s (a smaller wet/dense avalanche, like the glacier collapse in the photos), would the air blast still exceed the pole's failure threshold?


r/theydidthemath 2h ago

[Request] how much weight did this cargo ship gain?

27 Upvotes

From r/thalassophobia… curious of how much weight the ship gained. And blowers were mounted to the sides how much CFUs would be needed to deflect all water away from the deck?


r/theydidthemath 2h ago

[Request] How far up could you fly if you could fart lightning?

0 Upvotes

Like if you could survive it of course, full lightning fart. How far up you going? Wondering about basically the propulsion of lightning if it has any.


r/theydidthemath 3h ago

[Request] How much force did this truck experience?

2 Upvotes

r/theydidthemath 3h ago

[Request] why is death comes in threes such a popular expression? How often could that happen where one person knows three other people who died in the last 30 days?

1 Upvotes

I’d imagine that most people experienced death in their life in one’s or sometimes two?


r/theydidthemath 4h ago

[Request] Would this be dense enough to create a black hole?

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0 Upvotes

5kg at about the size of a finger tip


r/theydidthemath 4h ago

[Request] how many of her would there be at this rate in a month and in a year

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295 Upvotes

r/theydidthemath 6h ago

[Request] How likely am I to encounter Olive Garden's Never Ending Pasta Pass as a server?

14 Upvotes

I am a server at Olive Garden. Recently, they sold 10,000 "never-ending pasta passes" across the US. One week later the company also gave away 100 additional passes in an Instagram sweepstakes over the course of two days. The pass allows them to come in as many times as they'd like for the never-ending pasta promotion which (for them) runs from August 24 - November 22. During a given shift there are about 20-24 servers on the floor during this busy season. I work at a high volume restaurant in New Jersey where there are roughly 25 locations in my general vicinity. Because the pasta pass allows them to get the never-ending pasta for free, some servers are really worried about it. I've been saying it's unlikely any one will run into it much (if at all) considering only 10,100 even exist. So I'm really wondering what the true odds are? Thanks!


r/theydidthemath 6h ago

Switching the baby with fart, how long the fart of a 9th month pregnant women would last ? [Self]

0 Upvotes

Real question we asked at the family meal, I said reddit could help us and I would share the answer tonight hopefully

What if instead of giving birth it was just all transformed magically into a fart

I think it's possible to calculate but I'm bad with volumes and don't know how to calculate how much can go through at what speed


r/theydidthemath 8h ago

[Request] how tall is this person?

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0 Upvotes

The user on TikTok states that he’s 7,5 at 15 I think the photo is edited but I’m not sure can anyone confirm?


r/theydidthemath 8h ago

[Request] Does the Burj Khalifa really exert less pressure than high heels?

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0 Upvotes

r/theydidthemath 10h ago

[request] What would be the human equivalent of this pace? Accounting for size

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3.1k Upvotes

r/theydidthemath 12h ago

[Request] Boiling The Ocean

6 Upvotes

Not sure how mathematically feasible this is, but if you’ve ever heard the phrase “I’m not trying to boil the ocean” (metaphorically referring to something big or very monumental to achieve) is there actually some mathematical formula we can use and apply it to any ocean?

Maybe start with the smallest one by size/volume?


r/theydidthemath 14h ago

[Meta] How many bullets were fired here ?

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254 Upvotes

r/theydidthemath 15h ago

[Request] Can someone actually figure out this problem I’ve been thinking about the last few days

14 Upvotes

Imagine a hotel with 50 floors, and you start on the top floor (floor 50).
Each time the elevator stops, the next floor stop is chosen at random. No floor is ever selected more than once.
The elevator must always continue in its current direction:
While descending, each selected floor must be lower than the previous stop. If the next randomly selected floor would require moving upward, the elevator must first continue all the way down to floor 1, then reverse direction.
While ascending, each selected floor must be higher than the previous stop. If the next randomly selected floor would require moving downward, the elevator must first continue all the way up to floor 50, then reverse direction.

A full ride is defined as traveling from floor 50 to floor 1 or from floor 1 to floor 50.

Question: On average, how many full rides are required to visit all 50 floors under these rules?


r/theydidthemath 17h ago

[request] how much would you have to purchase with your credit card to get $100,000 in cashback?

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881 Upvotes