/r/estimation
Ever wondered what the rate of gummi bear combustion needed to power a lawn mower is?
How fast do you need to throw a burrito to make it spontaneously ignite?
A subreddit dedicated to one of the most useful skills in life. Estimation.
This subreddit is dedicated to taking a stab at answering hypothetical, interesting and often untestable questions. In reality, you're never going to get a perfect answer. Some things just can't be tested. That's why estimation is such a valuable skill.
The following types of posts are allowed:
Links to reddit posts related to estimation. Please include the actual estimation in the post title. Example
Requests for estimations as long as they have the [Request] tag in the title. Self posts are preferred. Example
Links to websites related to estimation.
When fulfilling requests
List all assumptions made
Link to sources wherever possible
Use SI units for your final answer
Don't downvote because someone's answer is different. As long as they have made appropriate assumptions and done their calculations correctly, their answer is valid.
Reference dimensions
Wolfram Alpha (Mobile version doesn't have ads)
Length of an everyday car: 4.4 m
Weight of an everyday car: 1300 kg
Length of a football field: 100 m
Volume of an Olympic swimming pool: 2,500 m3
Muzzle velocity of a round fired from a 9 mm Glock 17: 375 m/s or 1,350 km/h
Estimation strategies:
Other related subreddits:
/r/estimation
So if I consider my parents the first generation and absolutely no one in my family ever married anyone even remotely related to them, I would have 1024 ancestors in the 18th century.
However, for much of the time since then, people lived in much smaller communities with much less (social mobility) and a higher acceptance to marry distant cousins so chances are that there were marriages between people sharing the same ancestors.
In other words in the family tree with 1024 entries, how many of them show up twice because my grandmother and my grandfather had the same great great grandfather for example?
The very existence of this question is an official brain breaker if you aren’t a person with enough time to truly think about it the question is and I quote “ would you rather have unlimited bacon but no games, or games, unlimited games, but no games.” The question itself is well built and though I can only type this message the answer is based on how it’s said the answer to be chosen is number two it’s kinda like combining like terms but with words you have two games and one unlimited games when you combine like terms one cancels out the other leaving unlimited games (better) however bacon but no games being simple but loss of benefit therefore with more possibilities and simply a better option games, unlimited games, but no games wins hope that clears it up
Hi I always thought doing running and athletic gains strength. But my gf who is 4 inches taller and 30 kg heavier is stronger than me. She barely worksout .
She has big arms and upper body along with big thighs which are firm .
I tried armwrestling her, she smiled winked and defeated me . I tried lifting her i couldnt but she could with one hand. I was having shock face and she was smirking the whole time.
We tried wrestling and she sat on my chest i tapped out. When i sat on her she casually slammed me on the side. This is leading to a situation where she winks and physically dominates me.
Like when i was studying she came in the room and said hey short handsome and then bear hug me suffocating my face in her belly and laughed while pushing me making me fall to the ground
in general a boy is stronger than girl.
have u faced this or know somethijng like this.
who would win in this scenarior
I am 5 foot 4 ,56kg
Girls in my class of 5'6 , 85kg have challenged me to wrestling .
I am confident i will win as size doesnt matter. I am faster than them.
what do u think what will happen with me?
Ever saw a big girl take down or defeat a small guy?
I want to figure out how loud my car engine is without using any tools like a dB reader.
Assume it is sharp sand from a DIY store.
Hey guys! I recently started my own business offering estimation services for low-voltage projects. Some of my first clients are quite new to the industry and don’t have established vendor relationships to get accurate material quotes. I find it frustrating to create estimates for bids with a low chance of success due to this issue. I’ve been exploring ways to reach out to local vendors or vendors like Anixter, Graybar, and Accu-Tech across different locations to secure the best and most competitive quotes.I have been operating remotely so If anyone has insights or can point me in the right direction, I’d greatly appreciate it. Thanks!
As in people that plan to stay there most of their life, maybe go back to earth after retiring or something.
Bonus question because the above is largely speculation, how much is the total biomass of all ants on earth?
Like if all the water on Earth is temporarily removed and Earth is reshaped into a perfect sphere and then put the water back again, how tall/deep would it be
Occurred to me last night and I guess my gut response is that "people who don't eat pork" is the biggest group, but I'm curious about the hivemind's take.
I've been having a discussion with a friend and he doesn't think they're very big. You can see them in this YT clip for reference.
https://www.youtube.com/watch?v=Gq7cGlGCla8
At the end the one being dropped looks like it hits Hollywood based on the reference point of Griffith Observatory.
I tried to use the nukemap to try and estimate it but I'd like to see if anyone else has a method of approximating it.
Nukemap for reference - https://nuclearsecrecy.com/nukemap/
Clarity in comments
What weight of trash will a typical American generate in a lifetime?
I’m struggling with just coming up with the assumptions, I know the conversions.
But if I know the average lifespan is 78
My assumption couldn’t be how much trash per day an average American weighs right?
Cause then I’d literally only have to multiply it by their lifespan so I feel like I’m oversimplying it
Tried asking this on r/askscience but it got deleted so I'll post it here
So in Invincible, Mark stopped an asteroid from hitting Earth and then Omni Man tells him that was a "small one" and claimed to have stopped an asteroid as big as Texas. But just how powerful would the impact be of an asteroid as big as Nolan claimed?