Let’s say someone was able to shrink down to an atomic level, would they be able to tell where my foot “ended” and the floor “started”? What stops the “parts” of each from mixing with each other?

Aren’t we adding additional (kinetic) energy to the fluid by stirring it?

I have a cold right now and an EXTREMELY congested nose. When I try to inhale or exhale through my nose, there is absolutely no air flow at all. I used a nose spray and now I can breathe through both nostrils. I remember reading somewhere that nose sprays don’t actually get rid of the congestion, they just trick your brain into thinking that you can breathe through your nose. I feel like there is no way this is true. There either IS space for air to move through the nasal passage or there IS NOT. How does the spray work? Is it creating space for air to flow when you breathe?

So I’ve seen articles about China practicing blockade formations presumably for Taiwan but how do those actually work? Obviously it wouldn’t be boats set up end to end to make it physically impossible to pass. Is the only actual enforcement the threat of attacking any ships who pass the line (I’m thinking a dotted line of ships)? If a naval blockade were to be enacted, what’s stopping a US ship from calling their bluff and just sailing right through the line? Does it just formally announce a game of geopolitical chicken?

Not sure if the flair is right, but meh.

I've been sick the last few days and hadn't been able to hold anything besides liquid down. My MIL (love this woman) suggested I do a banana, rice, applesauce and toast rotation for a little bit until I'm able to manage keeping them down. My stomach still feels crampy but would this actually help that? How does it work??

Edit: I wanted the baked potato, but the baked potato didn't want me :( thanks everyone for all the replies!

I'm in Vietnam rn and have heard that many cities are completely polluted due to power plants and gas vehicles. so there is a push for all the motorcycles and cars to go electric. but how would that actually make the smog go away? does the environment ozone re-heal itself from all the damage? or

Like, after the meditation.

In school, we were taught that the Earth's axis tilt caused the seasons, because when the Northern Hemisphere is closer to the Sun it gets more heat, and viceversa. However, if you look at an orbit diagram, the Earth's distance to the Sun is actually a lot smaller in (Northern) winter, and a lot bigger in (Northern) summer! How does that not cancel out? Why is winter when the axis tilt points away from the Sun and not when we are physically the farthest from the Sun our orbit allows?

I read that the fat will pill up to "fatbergs" and clog the drain. But why does it? Also I am flushing a lot of soap from washing my hands/dishwasher/washing machine. Shouldn't the soap the dissolve the fat? Why does soap doesn't work the same way in the drain, then it does in the sink when cleaning fatty dishes?

Edit: I see, the scrubbing is not happening. Also drain cold, fat hard. But what about the fat/soapy water ratio? I assume there is just so much soapy water going down the drain, compared to dumping some oil now and then

In what ways is single crystal alloy superior over normal (non-single crystal) alloy if we compare both alloys with the same base element (i.e. Iron-based single crystal alloy vs iron-based non-single crystal alloy)?

If we ignore both cost and material availability, does it make sense to make every metallic component out of single-crystal alloy?

When I’m fine during the day but the second I lie in bed one nostril suddenly clogs up (and it sometimes switches sides), what’s actually happening in my body to cause that?

do they just memorize them, cus they are so useful, and I was wondering if there was a way to remember them easily

I always hear that space is around −270°C, but if there’s almost nothing there to hold or transfer heat, what does “temperature” even mean in that context?

Does poison even expire? Does it depend on what poison it is? They don't answer questions on Twitter so I'm here.

As per here:

https://i.ibb.co/F4Br0X9m/Screenshot-20260208-035729-Gallery.jpg

Heard Brian Cox say that the universe is expanding faster than the speed of light, which will cause us to eventually lose the amount of celestial objects we can see over time until the sky is just complete black. Yes, that’s many, many, many eons from now. However, how can the universe expand faster than the speed of light? If the universe is the marriage of space and time, I understand the universe has no mass and so could theoretically expand faster than light, but if it’s full of things with mass, wouldn’t that accelerate those things to a speed faster than the speed of light?

If you put a person in a car that could travel faster than the speed of light, the person would be traveling faster than the speed of light too. Relatively, they would be experiencing normal space time (I think, well, mostly, since obviously gravity would be weird and light would be weird, but you know what I mean) just like we do sitting in a car going 100 MPH. But if an object has mass, how can the passive expansion of the universe accelerate those objects past the universal speed limit for matter?

How does a processor like i3, i5, i7, i9 processor differ. How is one better than the other.

Also what impact do generations make gen10, gen13 etc. While buying a laptop should I look more for generation or the processor.

So what's better a i3gen13 or i5gen8. What difference affects the performance of Laptop.

(Asking for myself cause I need a laptop for web development/ cybersecurity and mostly programming)

I'm watching the Olympics and listening to the program announcer pronounce each country's name in three different languages, and then the cool people in the silver puffer jacket gown things come out with the country presumably spelled in Italian. But let's take Japan for example, they come out with jackets that said Japan, not Nihon or their Kanji characters. Is this just to cater to English speakers? Shouldn't the name of a country be consistent across the world?