HNHacker News
TopNewBestAskShowJobs

skogsbonde

4 karma · joined June 12, 2022

submissionscomments
skogsbonde··on Ask HN: Quickest path to a tech job in SF Bay Area?
Ok so you were referring to the fundamentals of programing and not computer science. The term "fundamentals of" can mean different things depending on what you're referring to. The fundamentals of C programming could be said to encompass understanding the stack and the heap and how memory is allocated and operated on through pointers. Or the fundamentals of Python could be said to encompass understanding that the program is a made up of statements that are executed in order, and that there are loops, variables, and if statements. Learning to write basic Python program doesn't take years.
skogsbonde··on Ask HN: Quickest path to a tech job in SF Bay Area?
I'm sorry but this is plain wrong. Not all programming jobs are the same. Has every coworker you've worked with had a solid grasp of the complete set of computer science fundamentals? I'd be surprised if that was the case for you, because in my case it's a definite no. But they still had the job and completed tasks didn't they?
skogsbonde··on How far behind a plane is its noise?
Oops, I mean to write even if the plane travelled faster than sound, not sound travelled faster than sound.
skogsbonde··on How far behind a plane is its noise?
The article is right

> So, how come it sounds like the sound of the plane is behind the plane? It's got to do with sound attenuation in the atmosphere and your hearing threshold.

> So, it's not at all like in the article.

On the contrary it is indeed because of what the article is getting at. It's because the sound emitted by the airplane at one position reaches you significantly later than the light the plane reflects from that position reaches you. Maybe what you're describing is that the sound emitted when the airplane took off reaches you faster than the airplane reaches you which sure, it's correct - but the light still reaches you way way faster.

> - "If the plane was moving very slowly, it wouldn’t outpace its sound by much." That's completely wrong. "very slow" aircraft are much slower than their sound, and all commercial aircraft still are slower than their sound, all of them are outpaced by their sound rather than the other way around.

Even if the s̶o̶u̶n̶d̶ plane (edit: meant plane) travelled faster than sound, you would still see the airplane passing over you before the sound emitted from the airplane when it passed over you reaches you.

Minor nitpick: - As an example, take an aircraft flying with 100 m/s

200 m/s would be a better example as the Boeing 737 (the most common commercial passenger jet) cruises at around 230 m/s