Successful_Try543
@Successful_Try543@feddit.org
- Comment on Why abc, xyz, etc.? 1 day ago:
p and q often also represent arbitrary rational numbers (Q), like m and n often denote natural numbers (N).
- Comment on Why abc, xyz, etc.? 1 day ago:
Actually, the use of i,j,k as counters is older than programming. It’s more like the other way round. They implemented making variables starting with i, j, k implicitly integer by default, as i, j, k were commonly used for indexing.
- Comment on Why can't a liquid move faster than the speed of sound in that medium? 4 days ago:
but it bounces off particles which makes it take a longer path
If I get the explanation on Wikipedia right, it’s not the photon taking a longer path, but the photon is absorbed by electons and re-emitted after a short delay. This effect is what decreases the speed of light in a transparent medium.
In exotic materials like Bose–Einstein condensates near absolute zero, the effective speed of light may be only a few metres per second. However, this represents absorption and re-radiation delay between atoms, as do all slower-than-c speeds in material substances. As an extreme example of light “slowing” in matter, two independent teams of physicists claimed to bring light to a “complete standstill” by passing it through a Bose–Einstein condensate of the element rubidium. The popular description of light being “stopped” in these experiments refers only to light being stored in the excited states of atoms, then re-emitted at an arbitrarily later time, as stimulated by a second laser pulse. During the time it had “stopped”, it had ceased to be light. This type of behaviour is generally microscopically true of all transparent media which “slow” the speed of light.
- Comment on Why can't a liquid move faster than the speed of sound in that medium? 4 days ago:
Nothing is truly incompressible.
Exactly. One usually speaks of quasi-incompressibility when the resistance against compression (bulk modulus) is much greater than the resistance against shear (shear modulus), which is oft the case for liquids such as water.
However, water has a lower resistance against compression (2 GPa) than e.g. steel (160 GPa), which is considered a compressive material. - Comment on Why can't a liquid move faster than the speed of sound in that medium? 4 days ago:
“Liquid/fluid” and “gas” don’t necessarily mean the same thing scientifically as they do colloquially, they’re actually very close to the same thing.
Both, liquids and gases, are fluids. The main difference is that liquid phases have a free surface, e.g. the level of water in a glas, whereas gases don’t. Their surface is equal to the surface of their compartment.
- Comment on YouTube app is the worst 5 days ago:
Ah OK. Thank you.
- Comment on YouTube app is the worst 6 days ago:
According to the description on F-Droid, PipePipe has SponsorBlock.
- Comment on YouTube app is the worst 6 days ago:
So in other words: You need to have the YouTube app installed for the ReVanced patcher application to work.
- Comment on YouTube app is the worst 6 days ago:
At least it’s not seen as a smart move to pay for services twice, particularly not if one payment is your private data and especially not if that data is going to a big corporation like Google.
- Comment on YouTube app is the worst 6 days ago:
PipePipe has a Login option that NewPipe explicitly doesn’t want to implement, and thus, allows to watch restricted content.
- Comment on YouTube app is the worst 6 days ago:
They are neither included in standard F-Droid repos, nor Izzy, nor do they offer an F-Droid repo themself.
- Comment on Stellantis abandons hydrogen fuel cell development 1 week ago:
This referrs to this statement in the text, mentioning both ICE and fuel cells:
That sometimes refers to hydrogen combustion engines, but more often, it’s hydrogen fuel cell electric vehicles, or FCEVs. Both promise motoring with only water emitted from the vehicles’ exhausts.
While this statement “no exhausts except water” holds for fuel cells, it doesn’t for ICEs.
- Comment on Stellantis abandons hydrogen fuel cell development 1 week ago:
Yet, for these facilities to be economically feasible, they need to run 24/7, not just when there is an excess of electricity available.
- Comment on Stellantis abandons hydrogen fuel cell development 1 week ago:
Ideally there are no harmful combustion byproducts when used in ICE, the reality is probably less harmful combustion byproducts, not none
E.g. nitruogen oxides
- Comment on Can you have an infinitely long wavelength of light? Or is there some maximum? 1 week ago:
Otherwise, the answer would be trivial, about 800 nm.
- Comment on If you had a huge slingshot, how much rubber band would you need to send a spaceship into space? 1 week ago:
Actually, the (vertical) velocity of the deflected center point of the rubber band is faster than the axial contraction of the rubber band itself (at that point) which is limited by the speed of sound of the material.
Derivation: Pythagoras, chain rule
- Comment on Why does everyone hate Income tax ? 3 weeks ago:
Being paid as some kind of tax isn’t income tax only, it’s also e.g. VAT.
- Comment on Are display sizes always measured in inches? 3 weeks ago:
Additionally, at least in German, the term inch is usually translated into the local counterpart Zoll.
- Comment on What are the differences between 1) probabillities, 2) possibillities, and 3) plausabillities? 3 weeks ago:
Thank you.
- Comment on What are the differences between 1) probabillities, 2) possibillities, and 3) plausabillities? 3 weeks ago:
If you throw a coin, the result has two possibilities: It may show either the obverse side (head) or the reverse (tails). These possibilities have equal probability (“50:50”).
- Comment on This meme goes way back 1 month ago:
Big Tiddy Gorgon Girlfriend :-p
- Comment on How to check whether a particular url is safe or not ? 1 month ago:
Tbf, the article is from 2018. It possibly has changed in the meantime.
- Comment on This meme goes way back 1 month ago:
Yet, the Medusa wasn’t involved in that story.
- Comment on How to check whether a particular url is safe or not ? 1 month ago:
Recently it has become a problem that optical twins of legit URLs exist, where some letters have been replaced by alike letters from different alphabets, see e.g. the list in this link.
- Comment on [deleted] 2 months ago:
Indeed.
- Comment on [deleted] 2 months ago:
practice pushing the gas pedal just enough to hold the engine at 3000 RPM or so. Not making crazy racing noises, just a nice steady “the engine is running normal-fast-ish”
Depending on the type of car, this might usually be somewhere between 1500 and 2000 RPM, 3000 RPM are more typical for a sports car.
- Comment on [deleted] 2 months ago:
As I’ve understood, it offers the ability to download files from different ‘one-click’ hosting platforms at ‘premium’ speed without having to pay for ‘premium’ at each platform individually.
- Comment on [deleted] 2 months ago:
Feel free to indicate the imaginary unit with ‘X’ or some other distinct symbol during your derivations.
- Comment on Why aren't the Mediterranean, Black Sea, Red Sea, the Baltic etc. considered Gulfs? 2 months ago:
According to its German Wikipedia article, the Caspian Sea is called sea and not lake only because of its size and salinity, not because it matches the relevant definitions of a sea.
- Comment on [deleted] 2 months ago:
Unless somebody is scolling through the ‘all’ feed.