Recent comments in /f/explainlikeimfive
SurprisedPotato t1_jaan7z1 wrote
Reply to comment by left_lane_camper in Eli5: how old is a photon from the sun when it arrives to the earth? by Opposite-Shoulder260
I'll think about this. I will note that the Lorentz transformation equations as given in the introduction to this wikipedia page look like they'd work fine, giving non-null answers, in the case v=c. They imply that in the photon frame, only t' = 0 is possible, but that's what you'd expect of a particle not traveling through time. The equations don't say "t' does not exist".
Maybe you've seen a formulation where something is divided by gamma = sqrt(1 - v^2 / c^2 ). Then, certainly, such a formulation might say "such and such a quantity does not exist when v=c". I would suggest that that's a limitation of the formulation, not necessarily a reflection of reality.
TucsonTacos t1_jaan0o8 wrote
Reply to comment by whereisfatherjack in Eli5: How did people know how long a year was in olden times? by Slokkkk
Well both
Edit to say: My bow!
Rhwyo t1_jaamktl wrote
Reply to comment by Chief_B33f in ELI5: What's with all the headlines about J.K. Rowling and her thoughts on trans people? by Chief_B33f
It's not just a couple of comments, it's been going on for years. She published a huge rant about trans people on her website. She has taken part in numerous events run by anti-trans campaign groups, and has repeatedly endorsed others, in some cases confirming that she has given money to them. She accidentally copied and pasted some text from an extreme anti-trans blog post (that she had presumably been reading) into the middle of a tweet aimed at a child. She then lied about this situation and claimed that trans people were angry at her just because she praised a child's drawing. She gets incredibly defensive and angry at anyone who disagrees with her. For example, Graham Norton was asked about her, and he very politely said that he thought the media should talk to trans people and medical experts instead of celebrities - she responded by accusing him of supporting rape threats and death threats (this is a common theme - she has received some rape threats and death threats, and therefore anyone who disagrees with her is essentially a rapist murderer).
On top of all of that, people have pointed to several questionable depictions of trans people (or characters who seem like they might be trans) in her novels. In one of her detective novels, the hero threatens to get a trans woman locked up in a men's prison, where he suggests that she will probably be raped. Some of the others are more of a stretch - there is a minor villain in Harry Potter who is a woman who seems to have very masculine traits. Some people think that one is a coincidence, but some people think the character lines up perfectly with how she views trans people.
jensjoy t1_jaamhe5 wrote
Reply to Eli5: Saving difference problem by theBloodsoaked
>then multiple that by 4 which equates $40 per month
You've got a wrong premise, leading to the difference you noticed. Apart from February, four weeks (28 days) do not equal one month (30/31 days).
left_lane_camper t1_jaamcrt wrote
Reply to comment by SurprisedPotato in Eli5: how old is a photon from the sun when it arrives to the earth? by Opposite-Shoulder260
It's a subtle difference and one we should be careful to distinguish: the lack of a valid reference frame for the photon means that it does not make sense to talk about the passage of time from the photon's perspective. Without such a reference frame, something moving at c (such as the postulated massless neutrino) cannot change, which would also be true if the elapsed time was 0, though that is not the case here.
But lacking a valid reference frame is not the same as saying the elapsed time (or distance) for a massless particle between its creation and some later time (from our perspective) is zero. Talking about elapsed time at all for a massless particle from its perspective doesn't make sense. If you are familiar with coding, it's vaguely analogous to the difference between a value being 0 (a real number that can be found on the number line) and NULL (a value that is not a number at all).
Saying "time does not pass" is kind of ambiguous and I wouldn't describe it as wrong per se, though without clarification it might lead someone to think that it means that "the amount of time is 0" rather than "it does not make sense to ask how much time has passed, as the photon lacks a valid reference frame in which time could pass in".
eloquent_beaver t1_jaamb54 wrote
Reply to comment by WeDriftEternal in Eli5: When/How did the world realize that it wasn’t the same time everywhere? by Ice_Ice_Fetus
It's not literally "the same time everywhere."
In special relativity, simultaneity is relative and depends on your reference frame.
Mp32pingi25 t1_jaam9pp wrote
Reply to comment by breckenridgeback in Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
Wait wait..vitamin C is in sour flavoring!!??? So sour patch kids are saving me from scurvy?!?!
a4mula t1_jaam1sp wrote
Reply to comment by macedonianmoper in ELI5: Why are clothes considered essential for survival? by acerthorn3
Extremes tend to prove the point in a way that most can understand. It could be argued that lesser variations could be survived by particular individuals. Not many can argue that a naked human would make it on the streets of a cold Chicago winter for long.
Live-Neighborhood857 t1_jaam1ez wrote
Reply to comment by Riegel_Haribo in Eli5: how old is a photon from the sun when it arrives to the earth? by Opposite-Shoulder260
Where can i find more on this? Very confused.
a4mula t1_jaaloxu wrote
Reply to comment by No-Struggle5102 in Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
No problem. Just keep in mind, and through no action on my part, I'm nobody. These type threads tend to get shut down pretty quickly because it's a forum in which we should promote objective answers that can be validated by all.
This is one in which there is no singular objective answer because it's too broad a question.
breckenridgeback t1_jaalmpx wrote
Reply to comment by Mp32pingi25 in Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
And, realistically, most Americans aren't deficient in Vitamin C anyway. It's found in all sorts of foods to add a sour flavor - a pack of your average sour candy is several day's worth of RDI.
TheBananaKing t1_jaaljwi wrote
Reply to comment by Chief_B33f in ELI5: What's with all the headlines about J.K. Rowling and her thoughts on trans people? by Chief_B33f
I strongly recomend you watch Contrapoints on the topic - she goes into a wealth of detail.
When the fuss first blew up a few years back, I assumed it was just your standard thoughtlessly-insensitive old person with outdated ideas but no particular malice.
I was wrong. Holy hell.
JK doubled down again and again and again on her hatred for trans people, to a jaw-dropping degree. She is raving batshit insane on the topic.
And once you've watched through that, check out the Shaun video on her ethics and political stance. Again, it goes into detail, and it's not pretty.
pleasegivemealife t1_jaalivb wrote
Reply to comment by Revenge_of_the_User in ELI5: Why is it that when fertilizers make their way into waterways, all the oxygen disappears, killing the fish? by Psychological-Dog994
Just add bubbles maker like those aquariums! Problem solved. Jk
macedonianmoper t1_jaalina wrote
Reply to comment by a4mula in ELI5: Why are clothes considered essential for survival? by acerthorn3
You don't even need to go that far, 10 degrees with any wind and you're fucked, you might not die but you wouldn't be fine
[deleted] t1_jaali5r wrote
Reply to Eli5: Saving difference problem by theBloodsoaked
[removed]
Loud-Ideal t1_jaal8mq wrote
Reply to ELI5: What's with all the headlines about J.K. Rowling and her thoughts on trans people? by Chief_B33f
These are her thoughts on trans people. I don't know why they aren't fond of her.
No-Struggle5102 OP t1_jaal3ie wrote
Reply to comment by a4mula in Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
Thank you will be posting more
No-Struggle5102 OP t1_jaal295 wrote
Reply to comment by Mp32pingi25 in Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
Thank you
a4mula t1_jaakzi0 wrote
Reply to Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
Because marketing.
Mostly. Certainly, there are specific times in which we have nutritional deficiencies, but the Flintstones probably shouldn't be the arbiter of that.
Mp32pingi25 t1_jaaky06 wrote
Reply to Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
You don’t need to take vitamins when you’re sick. That is just a myth started with some of those homeopathic medicines and the “emergenC” stuff. They are just vitamins and your body can only use so much and the extra will just come out in your pee. So if you are deficient in something then vitamins might help. But getting from food is by far the best
Rhwyo t1_jaakvq6 wrote
Reply to comment by WeDriftEternal in ELI5: What's with all the headlines about J.K. Rowling and her thoughts on trans people? by Chief_B33f
> JK Rowling has said some statements regarding trans people that some people consider disparaging.
She's been loudly campaigning against trans people for years. She has repeatedly said very overtly disparaging stuff about them or anyone who defends them, and has openly given money to anti-trans groups. Not to mention that there are several unpleasant depictions of trans people in her novels; for example, in one of her detective novels, the hero threatens to have a trans woman sent to a men's prison if she doesn't cooperate, and jokes about how the other inmates would probably rape her.
> Thats it. Thats all.
Are you being deliberately dishonest or do you literally just not know anything about the situation?
patienceisfun2018 t1_jaakvha wrote
Reply to comment by VRFireRetardant in ELI5: Why is it that when fertilizers make their way into waterways, all the oxygen disappears, killing the fish? by Psychological-Dog994
But what about cleanup, past prevention
BenjiSig t1_jaakd1v wrote
Reply to comment by Loupax in ELI5: Why is skin considered an organ? by PapaMamaGoldilocks
Blood is a tissue
breckenridgeback t1_jaan8n0 wrote
Reply to comment by Mp32pingi25 in Eli5: why do we need to take vitamins when we’re sick if we can get them from food? by No-Struggle5102
Well, not specifically sour patch kids (they're flavored with citric and tartaric acid, not ascorbic [which is vitamin C]), but yes.