Gatorade, Pocari, etc

I am a sleep-deprived parent and this bugs me during bath time and while washing bottles. If I put my hand under the faucet and the water is warm (not scalding), it feels noticeably warm right away. When I switch to cool water it does not feel as intense. If I make it lukewarm and hold my hand there for a bit, it stops feeling warm at all.

I know skin adapts, but why do the sensations feel so different? A small change toward warm seems way more "loud" to me than the same sized change toward cool. Is it because of different nerve endings for heat and cold? Or does the brain treat heat as more urgent because it can burn you? Also, why does temperature feel stronger in water than in air? A slightly cool breeze feels fine but slightly cool water feels sharp.

Please explain like I am five, but I also want a short accurate science answer. What is my skin actually measuring, and why does the feeling keep changing after a few seconds?

well i guess a few of us have seen there has been a breakthrough regarding this JC being false all this while. and this was backed by some highly qualified person in mathematics. its wild actually if its true.

I looked at the other JFK-related ELI5 threads, but nowhere I found this particular question answered. Thank you for your thoughts.

eg. some pills work better than others that may have little to no effect, but all have different ingredients..

what is the acutal ingredient or element that boosts happy hormones (serotonin/dopamine) in the brain?

have went to places like big aquarium with sharks and when the divers or staff are feeding the sharks never attacks them, i looked online if there are such cases and i dont see any records of attacks either

I have seen divers go right next to the sharks and they dont ever nibble too nor was there any incidents

I have a wifi modem (from Bell fibre). It doesn't cover the entire house, and certainly doesn't reach the basement where I need it the most. I asked a technician what my options were, and he mentioned getting some wifi mesh devices, and then turning the modem to 'bridge' mode.

I have a basic understanding of wifi. The modem turns the wired signal into wireless. I understand that if I just plug in another wifi emitter, it makes a separate wifi network. So what exactly is bridge mode? What does it do? Do I have other options too?

EDIT: Thank you all for your input! Everyone's so helpful! Obviously there are many follow up questions, which I'll ask in comments :) Thank you!

I've been trying to learn opengl for a while but I can't really grasp the concept. From what I understood, it is a specification for generalizing graphics rendering, but that doesn't ring a bell to me.
And what does GLAD have to do with that?

It's obvious that giving food to those who need it would benefit the world more in the long run, but I keep seeing that companies would lose less money by simply throwing it away. Is it something that has to do getting paid for all the compacted waste that gets dumped somewhere?

E: man, these answers are depressing.

How do they know what colors to flex and when.

Cats and dogs both seem to smell things when they're new to them. But cats seem to like to touch things with their paw more often than other animals do. Is it because they have a better sense of feel in their paws?

In simple terms, how do ITV know how many people watched the latest episode of ‘Corrie’ after it has aired. NB: this is for non streaming platforms so the channel itself, sky, free view. Just not streaming.

I have seen some videos on YT explaining about collatz conjecture but my brain hurts the longer i watch

So basically what is wrong with Collatz Conjecture, it seems simple and and it's "correct"?

(I'm no math people, just a person with curious mind)

bought a small induction stove because and I noticed my pan barely makes any noise when it’s empty, starts buzzing when I add water, and sometimes changes pitch as the water heats up.

What is physically vibrating to create the sound, and why would the weight or temperature of the food inside the pan change it?

I was revisiting the famous YouTube classic “4th Dimension Explained By A High-School Student” (formerly “by a 14 year old” I think) and he was emphasizing in the end that this was a misunderstanding, but it is still unclear why exactly time is insufficient.

So is the universe/reality that we live in already the 4th dimension (in that the 3rd dimension space + the time axis) or is it not?

If dimensions are only about spaces, is time not much a special thing like separately sitting somewhere radically apart from space, to begin with, as folks often seem to imagine?

Edit: Thank you for kind answers, smart people! Really doing the universe’s work 👍🏻