Asklemmy

Queuing theory can have some fun surprises.

Suppose a small bank has only one teller. Customers take an average of 10 minutes to serve and they arrive at the rate of 5.8 per hour. With only one teller, customers will have to wait nearly five hours on average before they are served. If you add a second teller the average wait becomes 3 minutes.

Here's one: Iron doesn't have a smell. It acts as a catalyst in the reaction of bodily fluids or skin oils, which is why you can't smell coins after washing them

There’s no such thing as tides. Gravity holds the water as the earth rotates

Everything is illegal in the DPRK except if you are the current Supreme Leader, in which case everything is legal.

Similar metal in the human body one, Vitamin B12 has cobalt in it. Absolutely wild. I guess that's not really commonly known but it's still worth mentioning

Speaking as someone who grew up in the 1980s...

Micro-SD cards almost don't make sense to me. I'm not saying I don't believe in them, because of course I have a few of them. Obviously they exist and they work. But. They're the size of a fingernail and can hold billions of characters of data. I uwve a camera that ive put a 128 GB microSD card in. A quick tap on the calculator tells me that's over 91,000 3.5" floppy disks. Assuming they're 3mm thick, that's a stack of disks 273 meters tall. But this card is so tiny that I have to be careful not to lose it.