Recent comments in /f/explainlikeimfive

Reasonable_Dealer991 t1_ixyz7yy wrote

Blood is made up of fluid (essentially, water with some electrolytes) and cells floating around in the fluid (red blood cells, white blood cells, etc). Milk is also mostly water, with some fats and protein. The water is the only thing that would evaporate out of the solution when heated. Heat it for long enough though and you’d probably destroy the red blood cells and white blood cells into little bits.

1

Malcolm1276 t1_ixyx9e7 wrote

Anecdotally, I've noticed that I can take a moment more to process conversations and allow others to speak more with less misunderstandings from my brain wanting to fill in the blanks and/or jump to conclusions.

I'm also able to return more to the original topic of a conversation when divergent paths pop up in the midst of discussions, where as before, I would ride the side rail chats out and forget the original topics.

I'm also able to direct my hyper focus a bit more, meaning without Adderall, I would randomly get stuck on tasks/ activities whether I meant to or not, and with Adderall, I'm able to better pick which tasks/ activities demand a lot of attention versus those I can put off to a later time.

This is from my perspective only though, your mileage may vary.

14

willtantan t1_ixyuost wrote

I am no expert. Below is just one hypothetical scenario. Let's say you go to a currency exchange stand to buy Euro. Euro price will be set by currency exchange stand, this price will include cost of currency stand business plus FX rates from their broker. Their brokers are probably some local small banks. Small banks will trade with larger banks like Citibank. Larger banks will trade with each other to set the FX rates. Governments will also participate in interbank market to influence FX rates. So FX rates are ultimately set up by interbank market.

1

NiemalsNiemals t1_ixyufwc wrote

Your hard drive runs a chaotic, but organized office. It keeps track of a lot of file cabinets, putting your files in them without a system, but always remembering where they are. It's a hectic mess, but your hard drive is a genius and can concentrate pretty well.

Now, it has a bunch of files on it's table, putting some back, pulling some out, all at the same time. It concentrates really hard to remember where everything belongs. Then you come up and bonk it. (Unplugging while it's working) When it wakes up, it might forget where some of the stuff goes and that creates a problem.

Generally, you want to make sure all your components are powered off and cleared of any residual current before touching them, as your filthy lil' hands can make electricity conduct to where it's not supposed to be and bzzt.

1

Jason_Peterson t1_ixyuagg wrote

The operating system and the drive itself each have a level of cache to defer writes to the disk and combine them with others to make the process more efficient with less random seeking. USB keys are usually configured with writing cache disabled and are slower, particularly when copying many small files.

When the drive is instructed to turn off, all outstanding data is written to the disk. The heads also get retracted from the surface of the disks and parked on a dedicated ramp. The drive tries to do this in case power is suddenly removed, but won't be able to orderly write out any buffered data.

2

mikeman7918 t1_ixyu8b9 wrote

When a computer is running, it often is reading g data from and writing data to the hard drive. This process isn’t instantaneous, it can take a bit of time to happen. If you unplug a hard drive while data is being written to it in any way, that data will become corrupted and unreadable. If it’s something important like a system file or a file you need, that can be really bad.

Shutting down a computer properly or hitting the “eject flash drive” button always ensures that these readwrite operations finish what they are doing and come to a stoping point where you can unplug the hard drive with no risk of this happening.

Even if you aren’t saving something actively, the operating system does a lot of miscellaneous readwrite operations for all kinds of reasons almost constantly. You never really know when they are happening, so it’s best to be safe with that.

This is also the same reason why unplugging a computer without shutting it down properly is bad. It can corrupt data that is part way through being written to the hard drive.

1