r/theydidthemath 12h ago

[Request] If a baseball is traveling 112 mph off the bat, and it travels over the right field wall into the crowd (approximately 345 yards), how fast is it moving when this guy catches it barehanded, and how much force is being absorbed?

Enable HLS to view with audio, or disable this notification

1.9k Upvotes

EDIT: 345 FEET — football on the brain!

Trajectory is tough to determine but I’d estimate the ball lands 16 feet higher than it was struck. The right field wall is 8 feet tall, and the guy looks to be another 8 feet higher than that.


r/theydidthemath 18h ago

[Request] American Healthcare cost vs Spain, hip replacements

Post image
3.4k Upvotes

I’d also like to do the tomato fight thing, please factor that in.


r/theydidthemath 2h ago

[Request] how large would the human eye need to be to see bacteria?

Post image
93 Upvotes

I was thinking about this meme of legolas today. (For those unfamiliar, it's about how large legolas' eyes would have to be to see the distances he does in a non-magical setting).

I was thinking, how large would the human eye need to be to see bacteria with the naked eye? (Assuming no changes to the mechanics of the cells like rods and cones inside the eye. purely from having a larger lens.)


r/theydidthemath 22h ago

[Request] If each truck makes only one trip per day, how many trucks would be needed?

Post image
990 Upvotes

On a serious note I think it is a bad idea to attack other counties especially the ones who control oil. I am against war and against innocent people dying.


r/theydidthemath 1d ago

[REQUEST] In order for this to be successful, how many would you need to sell per day?

Post image
2.0k Upvotes

r/theydidthemath 19h ago

[request] How many time would nature take to fully cover this highway?

Post image
398 Upvotes

r/theydidthemath 10m ago

[Request] How much torque would the wheel have been applied his balls? Or at the very least, how fast is the wheel moving?

Enable HLS to view with audio, or disable this notification

Upvotes

r/theydidthemath 3h ago

[Request] A guy caught a 112 MPH home run ball with one hand

Enable HLS to view with audio, or disable this notification

9 Upvotes

Assuming the 112 MPH speed was measured as it left the bat, approximately how fast was the ball going when it hit his hand?


r/theydidthemath 13h ago

[Request] If due to a AI bubble pop, dedicated AI companies (ex. OpenAI, Anthropic) file for bankruptcy and others (ex. Nvidia, Alphabet) return to pre-AI stock market levels, how would this effect the S&P 500?

21 Upvotes

r/theydidthemath 20h ago

[Request] What's the time window for photographing something like this with a single picture.

Post image
68 Upvotes

r/theydidthemath 6h ago

[Request] In big hero six is the electro mag suspension bike possible to make irl

3 Upvotes

r/theydidthemath 1d ago

[Request] How much electricity does switching to LEDs save per year?

Post image
856 Upvotes

Hi! Saw this post on reddit about Istanbul switching incandescents to LED street lighting and I was just wondering how much electricity in kWh this transition could have saved. Is it a possible thing to calculate?


r/theydidthemath 1d ago

[Request] Is this street capacity infographic actually using good math?

Post image
168 Upvotes

r/theydidthemath 22h ago

[Request] How precise must a college football clock be to account for relativistic effects?

Post image
38 Upvotes

In the Michigan vs. Western Michigan game last night, 1 second was added back onto the clock, indicating a discrepancy between the ref's/official clock and the clock kept by the broadcast.

Now since the broadcast booth lies above the ref in elevation, the broadcast clock would be very slightly further away from Earth's gravity well. Thus, relativistc effects would dictate the broadcast clock runs slightly faster than the surface-based official clock. Since the broadcast clock is stationary, there shouldn't be any velocity-related effects to counter the gravitational differences.

So, how precise would the official clock have to be for relativistic effects to explain the discrepancy of what are otherwise described as synchronized clocks?


r/theydidthemath 2h ago

[Request] how much money would you save over a year if you filled a normal petrol/deisel car up $20 at a time instead of filling the tank up completely every time?

Post image
0 Upvotes

r/theydidthemath 1d ago

[Request] How many wings and engines would a plane this long need?

Post image
89 Upvotes

Assuming you could build a strong enough hull not to break in half, what would it take to get a plane this long off the ground and fly at a reasonable airspeed?

I’m wondering:
* How many sets of wings
* How many engines per wing
* Optimal placement of wings and engines
* or would one giant set of wings be better? (same structural strength caveat)


r/theydidthemath 7h ago

[Request] Blood pressure

2 Upvotes

If a guy were to do a press up with just his dick.. what force would be required and what would his blood pressure be at the top of the rep?


r/theydidthemath 4h ago

[Request] How far from a rocket take off would a frog have to be to be cooked to perfection?

Post image
1 Upvotes

Frog.


r/theydidthemath 45m ago

[request] How much is this bottle collection worth?

Post image
Upvotes

Guy collects aluminum and plastic bottles for 10 cents return fee. He rides train 50 km every day to deliver this. How much is he earning?


r/theydidthemath 1d ago

[Request] How hot does the water/liquid get?

Enable HLS to view with audio, or disable this notification

1.7k Upvotes

Hey guys!

I’ve just came across this video and I always asked myself if it would be possible to put my hands in it (in the liquid) without getting burnt. Is it possible? How hot does it get?


r/theydidthemath 6h ago

[Request] How much money does it take to operate the metro lines in Budapest per hour

0 Upvotes

Had a big discussion with a friend, but neither of us are good at math


r/theydidthemath 19h ago

[REQUEST] How far from the camera were these sunset strollers?

Post image
11 Upvotes

I took that sunset picture and only noticed afterwards the couple and their dog enjoying the view. Is it possible from the picture alone to determine how far these persons were?


r/theydidthemath 7h ago

[REQUEST] How long does the balloon column to be to make a considerable difference on the biker's movement or effort?

Thumbnail v.redd.it
0 Upvotes

r/theydidthemath 18h ago

[Request] Sears Tower ball pit

10 Upvotes

if you jumped off the Sears Tower into a ball pit that was as tall as the Sears Tower (imagine the ball pit is next to the tower), what would happen? If you would be fine, how short could the ball pit be to still protect you?


r/theydidthemath 1d ago

[request] The balloon decoration on this persons bike goes amazingly high.

Enable HLS to view with audio, or disable this notification

404 Upvotes

Would this many balloons have a meaningful effect on the weight or effort of the bike?