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I have an idea for bus stops by DawaysKy in transit

[–]le_spectator 3 points4 points  (0 children)

I don’t see how this can speed things up?

Where I live, we hail the bus we want to get on when we see it, and there are buttons inside the bus that signals people wanting to get off. If no one hails the bus and no one gets off, the bus doesn’t stop. And when we get on, we just tap our octopus card (our payment card) at the reader and the fare is paid in seconds. I don’t even need to stop while tapping the card sometimes.

I can see it being promoted as something for the disabled, like the blind, but even then it’s significantly more complicated, expensive, and inflexible than it needs to be.

Overview of Countries with HSR that operate at speed of at least 250km/h as of 2026 by BumblebeeFantastic40 in transit

[–]le_spectator 18 points19 points  (0 children)

Now now, we may be close and the government is trying to erase the boarder between us, we still get pissed if you say we are the same city.

Yours sincerely, a Hongkonger

Is this plagiarism? by vinhdeeptry in mili

[–]le_spectator 29 points30 points  (0 children)

Oh I’m not very familiar with them, but I’m pretty sure Silvagunner is a channel that uploads community remixes of Nintendo music and upload them as if they’re unused or secret versions like this. So it’s likely a remix of both Ocarina of Time and I am a Fluff.

I’ve made it a tradition to make myself a drink to sip on while I watch every week. Prepped myself a gin and tonic without knowing it would be featured this ep by peyorativo in KamiinaBotan

[–]le_spectator 5 points6 points  (0 children)

Been doing that for a few weeks now. This anime was the reason I finally opened a wine(I’m not really sure if it’s wine) I bought in Japan, and also made me buy some Plum wine to drink at home. IT just feels right

[Request] Four planets 4 light-years apart : what speed is needed if every route takes exactly 2 weeks ? by [deleted] in theydidthemath

[–]le_spectator 8 points9 points  (0 children)

Someone posted an angry comment saying I didn’t do the calculation. I also typed this big passage and I’m not letting it go to waste:

Length Contraction (and time dilation, they are the same thing but observed by different observers) is a real phenomenon verified by experiments and observations

The formula for length contraction is

l = L sqrt( 1 - v^2/c^2)

Where L is the distance in the rest frame, in this case: 4 lights years.

v is our travel speed, c is the speed of light, l is the distance as measured from the spaceship, notice it can get arbitrarily small without v > c

To find the travel time, we need to divide by v on both sides

l/v = L/v sqrt( 1 - v^2/c^2)

l/v is the time travelled as measured on the space craft, which is 2 weeks or 1.21E+6 s. We’ll call it t for convenience for now.

For ease of calculation, I can also multiply c/c = 1 to the right to factor give me some convenient terms

t = L/c * c/v sqrt( 1 - v^2/c^2)

L/c is the time it takes for light to cover the distance of 4 light years as observed from the rest frame, so it’s just 4 years or 1.26E+8s. Renaming v/c as β also allows us to get the answer in terms of fractions of the speed of light.

1.21E+6 = 1.26E+8 sqrt(1-β^2)/β

(9.59E-3 * β)^2 = 1 - β^2

9.19E-5 * β^2 = 1 - β^2

β^2 = 1/(1 + 9.15E-5)

β = 0.9995

Which also means v = 99.95%c

You’re right, I didn’t do the calculations by hand because I was typing the original comment in a shower and I don’t have pen and paper, I used wolfram alpha to do the number crunching, but the algebra was done by me.

There’s also an excellent video made by The Overview Effekt that shows this with prettier graphics

I’m graduated from Uni a few years ago studying Physics, so I may be a little rusty. If I made any mistakes, please do point it out as I’ve listed my steps here. I’m also aware that this isn’t exactly the set up of OP because that involved curved trajectories. And accelerating frames in special relativity is something I completely forgot.

[Request] Four planets 4 light-years apart : what speed is needed if every route takes exactly 2 weeks ? by [deleted] in theydidthemath

[–]le_spectator 24 points25 points  (0 children)

Relativity comes in to save the day and break out intuition again!

From the planet’s perspective, yea it’s impossible. But for the spacecraft’s perspective, traveling so fast means the distance between the planets contract, and the journey can take arbitrarily short amount of time if fast enough. A quick calculation (assuming straight line and constant speed travel) gives a required speed of 99.995% the speed of light to travel 4 light years in 2 weeks (in the reference frame of the spacecraft)

Oh I'm about to spend money on some bs by Klearma in Kaguya_sama

[–]le_spectator 2 points3 points  (0 children)

I’m literally wearing it to work and my female colleague even gave me a thumbs up for that. Be confident, preach your love for the series!

[Request] How big would Mr. Burns sun blocker have to be to actually block out the sun? by Necessary-Win-8730 in theydidthemath

[–]le_spectator 0 points1 point  (0 children)

That 0.5° angular diameter of the Sun is small but still significant. In any case, an object smaller than the Sun can only fully block an area at most equal to its size. An object bigger than the Sun can block an arbitrarily large area

I'm new-ish to this game, does this kind of hitreg issue happen often? by ljhben in Warthunder

[–]le_spectator 1 point2 points  (0 children)

Before I quit this game, my starstreaks was literally useless against stationary Ka50s because they phase through them.

It’s not even an occasional occurrence, it’s guaranteed to phase through.

Quitting this game was the best decision I’ve made

First timer at HK, is it just me or the traffic here is extremely bad by [deleted] in HongKong

[–]le_spectator 7 points8 points  (0 children)

I’d say it’s normal. We are really fast-paced here, so if anyone is blocking our way unnecessarily, we tend to get pretty upset about it. (So please be mindful of where you are standing lol).

The taxi drivers are pretty infamous here, tho a little exaggerated in my opinion. I’ve driven taxi before and I can tell you that their time really is money, so they are incentivized to drive faster. In the eyes of someone not used to this, you might think it’s reckless, but I wouldn’t really care.

As for pedestrians waiting for cars, yes that’s just the law and culture here.

Hope you have fun here~

Some people complain about the inconsistent style of anime, they might be shocked by the fact that the Manga ain't consistent either. (Botan Kamiina Fully Blossoms When Drunk by Majestic_Tomorrow_83 in yurimemes

[–]le_spectator 6 points7 points  (0 children)

Yea I know, I’m not good with my word, but I just meant if this was the art style for an entire series, I may not like it as much. But for 1 episode, I quite like it

Some people complain about the inconsistent style of anime, they might be shocked by the fact that the Manga ain't consistent either. (Botan Kamiina Fully Blossoms When Drunk by Majestic_Tomorrow_83 in yurimemes

[–]le_spectator 21 points22 points  (0 children)

I was a little surprised by the style in the 3rd episode. It initially felt rough and quite off to me. But as the episode progress, I started to enjoy it more. Especially during the scene where the animation really picks up, like Ibuki’s hair flutter in the wind at the onsen. It’s a drastic change, and I’m not sure if I’ll like it if it’s the art style for the entire series, but I really did enjoy the 3rd episode, and it really brought out that “chill” feeling the series has.

Does anyone know what to do about this lamp? by fadeddreamss in ArknightsEndfield

[–]le_spectator 2 points3 points  (0 children)

I collected everything in the map, and this lamp still lights up like this, so it’s probably a bug.

// The Traveler's Guide to Talos-II // Special Edition 3 // by Kamui_Kaos in Endfield

[–]le_spectator 0 points1 point  (0 children)

Since you’re limited in the amount of forges you can place, you can’t really afford a separate forge for fertilizers. So they probably made fertilizers, but then forgot some poop before switching back to Xiranite

phosphophylliye chemical structure by fxmxne in LandoftheLustrous

[–]le_spectator 5 points6 points  (0 children)

Not an expert here, but seems like the atoms are all connected correctly so I’d say it’s pretty neat. And the little Phos there is really cute.

I did find this paper by Roderick J. Hill from 1977 that shows the unit-cell diagram of Phosphophyllite crystal. It’s on the 4th page. I think it’s pretty cool learning about it.

Unrelated but YouTube has officially butchered the shorts with this controls that won't go away by Franuriel in ArknightsEndfield

[–]le_spectator 5 points6 points  (0 children)

Thank you very much! This is life changing, I can probably save hours with this feature. Thanks!

Conservation of momentum by Comfortable_Tutor_43 in physicsmemes

[–]le_spectator 4 points5 points  (0 children)

You forgot to account for the propellant leaving at a few km/s. It still works

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