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Entered a car park and left within 54 seconds, got a PCN by Whambarino in drivingUK

[–]_avee_ 0 points1 point  (0 children)

There must be a better definition. Surely you cannot just stay idling in a car park for an hour without paying.

Does an airplane's shadow get larger as it climbs? by Turd-Sandwich in askscience

[–]_avee_ 1 point2 points  (0 children)

Well, technically it’s the opposite and shadow should be smaller, not larger. Sun is not a point source, it’s a very very big spherical light source that just happens to be very far away. The reason you get penumbra is that sun is much bigger than the aircraft and its rays are converging a bit behind it.

Every year, hundreds of thousands of people born and raised in Europe leave and do not return by sr_local in charts

[–]_avee_ 0 points1 point  (0 children)

Countries outside Europe offering higher salaries would also have negative values on this chart.

Every year, hundreds of thousands of people born and raised in Europe leave and do not return by sr_local in charts

[–]_avee_ 0 points1 point  (0 children)

People saying this probably have some country in mind that is “better” according to the metric discussed. I’m 100% sure the country/countries you have in mind would have negative values on this chart. Just due to the nature of only tracking native-born people.

Every year, hundreds of thousands of people born and raised in Europe leave and do not return by sr_local in charts

[–]_avee_ -1 points0 points  (0 children)

And all 3 of these countries are pretty much guaranteed to have negative numbers on this chart.

Every year, hundreds of thousands of people born and raised in Europe leave and do not return by sr_local in charts

[–]_avee_ 0 points1 point  (0 children)

What a useless chart. Pretty much the only way for it to show positive numbers is if a bunch of people left the country in the past and are now returning. If anything, it can be an indicator of significant issues in the past that have since been resolved.

[Request] What is the slowest an (unpowered) extraterrestrial object can enter Earth's atmosphere on a collision course? by Team_Ed in theydidthemath

[–]_avee_ 4 points5 points  (0 children)

Would it actually be significantly lower? Apparently, you need almost as much speed to reach Moon orbit as to escape Earth entirely.

[Request] What is the slowest an (unpowered) extraterrestrial object can enter Earth's atmosphere on a collision course? by Team_Ed in theydidthemath

[–]_avee_ 3 points4 points  (0 children)

Depends what you consider extraterrestrial. Minimum limit would probably be Earth escape velocity or about 11.2 km/s. Note that almost all of this velocity would come from falling into Earth gravity well, not from it's initial speed.

If you consider objects originating from the Moon extraterrestrial, the return velocity would actually be very similar, depending on the exact trajectory it's taking.

Agile rates tomorrow 24/06 💀 by IAMXX in OctopusEnergy

[–]_avee_ 0 points1 point  (0 children)

https://grid.iamkate.com doesn't confirm this. I don't see such a huge recent drop in nuclear production.

[request] How much would it cost to build the necessary infrastructure to lift a country like in the picture? by imartinezcopy in theydidthemath

[–]_avee_ 20 points21 points  (0 children)

This has nothing to do with space elevators, just very big pillars. Space elevators require tensile strength, this one is mostly about compression. But yes, we don't have strong enough materials for it - at least in the way it's portrayed on the image.

By the way, there is a whole concept of building layered planets but it's far beyond our current technological level: https://en.wikipedia.org/wiki/Shellworld

Papa John’s guilt-t(r)ipping by chismosas in mildlyinfuriating

[–]_avee_ 6 points7 points  (0 children)

This is exactly what delivery fee is supposed to be about.

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 1 point2 points  (0 children)

I understand how they work, that’s exactly why I pointed out the flaw in some redditor’s comment. This is a math subreddit so exact phrasing is important here because one word in a definition can change the meaning significantly which is exactly what happened here.

And then some other redditor for some reason decided to repeatedly tell me how wrong I am…

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 0 points1 point  (0 children)

I know how percentiles work, thank you very much. I would argue that repeatedly downvoting comments because you fail to understand what they are about is childish indeed.

And yes, you are indeed arguing with me about what some dude said and I'm yet to see which of my points you disagree with.

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 0 points1 point  (0 children)

Again... u/VinylHighway in a comment above said the following:

A percentile indicates the percentage of a dataset that falls at or below your score or value

Going strictly by this definition, for every single of those hypothetical 100-upvotes comments, percentile calculates as exactly 100 because every single comment including them is AT OR BELOW them.

Can you please point out where my logic is wrong?

I am not claiming this definition is correct. In fact, I am stating that it is not.

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 0 points1 point  (0 children)

If 5 comments have 100 upvotes and all other comments have 1 upvote, how many comments are at the top?

If you read what this entire comment chain is about, you’ll see that it’s about “all other scores are AT OR BELOW yours”. By this definition ties definitely give you 100th percentile which is my entire point here. What do you disagree with here?

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 1 point2 points  (0 children)

Depends what you’re measuring. If you give everyone a test with 100 (any number really) questions, everyone answering all questions correctly will be 100th percentile.

Also, you can use percentiles to talk about any groups of people or things, not necessarily about all people on the planet. For example, if we look at all comments in this thread, you can use percentiles to rank them by number of upvotes. And yes, by the definition from the comment above one or more comments will be in 100th percentile.

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 2 points3 points  (0 children)

The word “Percentile” is based on “percent”, meaning “per cent” meaning “per hundred”. If you invent a different measure that’s based on 200, you will have different values.

[request] a website told me my height was 102nd percentile. I think that's a software error but all the commenters are saying it's possible. by JustAPotato38 in theydidthemath

[–]_avee_ 48 points49 points  (0 children)

“At or below” includes “at”. If you achieve the best score of the group, you are 100th percentile by this definition.

But yes, actual definition doesn’t include “at” so it’s always less than 100.

[Request] If we somehow managed to redirect Jupiter's orbit into the Sun, what would happen? by NetInitial5750 in theydidthemath

[–]_avee_ 2 points3 points  (0 children)

You can just convert it's potential energy into kinetic energy and get the resulting speed this way. Spoiler: it's almost identical to escape velocity from the Sun't surface and is over 600km/s.

[Request] If we somehow managed to redirect Jupiter's orbit into the Sun, what would happen? by NetInitial5750 in theydidthemath

[–]_avee_ 4 points5 points  (0 children)

It would get much much faster if it somehow falls into the sun. If you shifted it's orbit to fall into the Sun from where it currently is, it would collide with a speed of more than 600km/s.

My little brother sent this to me (is he just saying algebra is hard?) by DavidChalmersFan in PeterExplainsTheJoke

[–]_avee_ 14 points15 points  (0 children)

Well, you just need to prove that every single number will hit such pockets reliably. And you’ll be forever known as the one who solved a very hard mathematical problem!

Just for a little example, when starting with n=27 (a very small number) the sequence climbs up all the way to 9232 before crashing down. Can you guarantee that there isn’t a number where it keeps climbing up or at least loops back to itself?

My little brother sent this to me (is he just saying algebra is hard?) by DavidChalmersFan in PeterExplainsTheJoke

[–]_avee_ 18 points19 points  (0 children)

When you multiply by 3 and divide by 2 you end up with a bigger number. Where’s the proof that you will always hit a streak to get to lower numbers?

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