Little physics problem

[pier4r]

Let's pick a baloon filled with air at the sea level.

it should float on water level, as it is heavy enough to "fall" through the air.
At 3000 m it should pop, or at least expand, as the air pressure around it is lower.

(07-26-2018 07:53 AM)Leviset Wrote:  Just sign up to Brilliant.org and you can have daily questions like this one - just choose beginner/intermediate/advanced!

Yes brilliant is a partially nice site, but stimulating a community is also good (I would be fine in bringing here questions from sites with problems).

I said before "partially" as brilliant , as it is designed like many modern social network, buring older questions/entries (older = some days) under the newest and making the search of older question really hard. Therefore the possibility of enjoying a library of questions is lost. Instead on a forum like this finding old challenges or even answering them after a while is pretty neat.

Careecup is also filled with problems (mostly meh), but then again the discussion of them is suboptimal.