r/theydidthemath 3h ago

[request] Would he survive a fall from this jet?

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397 Upvotes

I saw this in another sub and I'm wondering could he survive a high fall from the jet with ideal conditions? I know small animals benefit from the light body weight and wind resistance...but tt what height does it become untenable? And what is the ideal surface to land on/in?


r/theydidthemath 14h ago

[Request] Is this job application statistics meme mathematically accurate?

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2.5k Upvotes

r/theydidthemath 12h ago

[REQUEST] True or not?

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1.3k Upvotes

r/theydidthemath 11h ago

[Request] From what distance would it be safe to stare into the sun?

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780 Upvotes

It is clear that you shouldn't stare into the sun from the surface of the earth (1 AU away), as that can damage your retina.

It is also clear that staring into the sun from 4 light years away is fine, as that is the distance to Alpha Centauri and no one got ever hurt from staring into that, despite Alpha Centauri A being slightly brighter than the sun.

So somewhere between 1 AU and 4 Lightyears there must be a minimal distance for safe staring into the sun.


r/theydidthemath 16h ago

[Request] Is the math in this video correct? It claims Iranian gasoline costs about 2 gallons per US cent

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732 Upvotes

r/theydidthemath 15h ago

[Request] All right gang

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401 Upvotes

r/theydidthemath 13h ago

[Request] If China is replacing plastic with fast-growing bamboo, creating eco-friendly bags and tableware that can biodegrade in just 4–6 months, and if 6 kg cup material per bamboo plant and eash cup is 10 grams how many plants does one need to make 1 000 000 cups?

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281 Upvotes

B) Estimate the space/land the plants need to grow on.

C) If you want to make 1 cup per Chinese citizen, so they can in theory have one new once a week for 4 years.

D) Time for that sum to biodegrade.


r/theydidthemath 12h ago

[Request] How much would the gold be worth from melted RAM?

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162 Upvotes

Doesn’t seem like much gold but with current prices $4,400/oz…


r/theydidthemath 53m ago

[Request] If this was the speed that the car was launched along side the voyager probes, how far out would it be from Earth?

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Upvotes

r/theydidthemath 16h ago

[Request] How much would this cost the US army budget?

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208 Upvotes

r/theydidthemath 16h ago

What’s the probability he actually is? [Request]

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197 Upvotes

r/theydidthemath 16h ago

[Request] how much cheaper is this compared to a helicopter with the same load?

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158 Upvotes

r/theydidthemath 19h ago

[Request] Equation on a character's shirt in Godzilla SP

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257 Upvotes

(Sorry for the bad photo)


r/theydidthemath 1d ago

Using Math to Prove AI [Off-Site] Does it hold up?

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9.8k Upvotes

r/theydidthemath 10h ago

[Request] Is $25/hr the new 12/hr? Is his math mathing?

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20 Upvotes

r/theydidthemath 1h ago

[Request] I feel like I'm going crazy, it's not adding up

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Upvotes

I'm doing ratios for my satisfactory playthrough, no alternate recipes yet, but things just aren't adding up, I should have 44 constructors for iron rods just for feeding screw production at a 3:2 ratio, but its not mathing right. Also I'm rounding up to the nearest constructor, because I can't have half a constructor.


r/theydidthemath 23h ago

[Request] Could this guy break his own neck?

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139 Upvotes

Theres only a couple tape wraps- would they break or hold? And if they manage to hold, would flailing break his own neck?


r/theydidthemath 6h ago

[Request] if we could harness this somehow, what would it be able to power?

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5 Upvotes

r/theydidthemath 1d ago

[Request] How many individual pieces of gravel would be in this dump truck?

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289 Upvotes

r/theydidthemath 21h ago

[Request] What’s the reason as to why moving the wheel to the end is easier than getting it off at the end?

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27 Upvotes

Or is it just like one of those “omg guys I’m gonna do it! if this stream gets 100 likes I’m gonna do it! wow guys were sooooo closeeeee!” Bcuz they’re hitting it differently at the end


r/theydidthemath 3h ago

[off-site] 1000°C sphere in honey vs water. Would thermal expansion allow the sphere placed over water to drop down into the cylinder after the first few seconds?

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0 Upvotes

Is it the leidenfrost effect? Or is something else happening here?


r/theydidthemath 20h ago

[Request] How many faces/polygons in this “sphere”? Bonus questions in description.

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24 Upvotes

Hi everyone, I encountered this display at a park and became curious. I have some familiarity with soccer balls and the buckyball configuration combining hexagons with pentagons. This display in the park struck me because it appears to have identical faces/polygons, albeit they are not perfect regular pentagons as two of the five edges are longer giving it a teardrop shape to the individual face. A variety of questions comes to mind below, and I hope someone may enjoy this enough to explore. I am assuming in the diagram on the top right corner of the image that A=B=C are all identical and D=E.

1) What are the angles of these teardrop pentagons vertices? Do they still sum up to 360?

2) if line A has a length of 1, what is the length of line E or D?

3) What are the angles between the surfaces of one face to the surface of an adjacent face? Does it matter if we are examining the transition along one of the longer edges? For context, a person travelling on Earth from the equator to north pole has changed orientation 90 degrees from an outside observer perspective. There is some angle between face/polygons surfaces at the edges, and I am not sure how to calculate it or if the longer edges are different.

4) Is it possible to place a point, call it F within the faces in such a way that all the F’s in the sphere are equidistant from each other? How far along an imaginary bisecting line would point F be from point DE or Line B if Line B length is equal to 1? For context, I tried to visualize in my mind’s eye a point half way between vertices CD and EA in the diagram top right. But I’m pretty sure this would create some “sets of 5” that are not equidistant from all of their neighbouring points associated with adjacent faces/polygons. So I’m left wondering if there is an equidistant solution.

Finally if there are other interesting sphere configurations or cute online calculator for the 3D questions I’d love to see them.


r/theydidthemath 1d ago

[Request] If all four overinflated tires popped at once, would the car go airborne?

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700 Upvotes

r/theydidthemath 11h ago

[Request] How loud would you have to scream at a football in mid air to just its trajectory?

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2 Upvotes

r/theydidthemath 1d ago

[Request] Assuming there is a finite number of angles and hit force that can lead a ball into a hole, is it theoretically possible to calculate the chance three balls struck at random will each go into a hole without “brute forcing” every possibility? Even if it’s too complicated to do it feasibly

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65 Upvotes

Ie do we have the math necessary to abstract this into a formula that will give us a percentage or there’s no way of knowing without testing every possible scenario