/sci/ - Science & Math

>>11554629
>Literal rocket science
Yeah I'm not doing your homework for you fag

If its in a vacuum then why is the balloon floating?

>>11554684
its not. read the scale

i made a more shitposter version for memers as well as putting in relative volumes for the two containers.

>>11554681
>t Nasa Shill

Neither flies nor the scale is vacuum.

>>11554704
Ooooh baby hurt me harder daddy.
One day you'll be able to realize FTL manipulations, detection and travel, but sadly, that is not today

>>11554741
ok how about this?

>>11554774
it depends heavily on the geometry of that hole, dude

>>11554824
its a cylinder through the skin of the container. hell you can even make the entire container one big drum and just take the lid off suddenly. are you 13? do you need me to hold your hand through a physics scenario? can you not make some assumptions yourself?

So is the point you're making that its hard to calculate thrust through a nozzle?

>>11554841
its just a simple thought experiment on the nature of thrust in empty space.

>>11554841
it's just pressure*area but it won't help you because you need to know the ISP of hydrogen through the nozzle

>>11554851
When I was a kid I thought rockets couldn't work in space because there was nothing for them to "push" on, is this what you're after?

>>11554853
but the area of the nozzle is no longer being pushed on by the air. the air can can just fly out into empty space and that kinetic energy is lost.
>>11554860
yes

>>11554875
the area of the hole isn't being pushed on by the hydrogen, but the area across from the hole IS
so it's a net area*pressure difference

>>11554875
>Energy can ever be lost

Lol

>>11554882
aw man why do retards always think they are smart. i mean lost from the system. you think that energy in a circuit isnt lost as heat to the environment?

>>11554881
where does the pressure difference affect the forces. this isnt like a plane wing creating high pressure zones in a medium, this is a medium and a lack of medium. its a big difference.

>>11554886
>i mean lost from the system

There is nowhere for the kinetic energy to go except for the rocket/balloon, so the rocket/balloon must accelerate. You can watch this occur yourself by blowing up a balloon and letting it open. It’ll fly around.

>>11554910
retard, bye

i was pretending to be retarded.

>>11554936
I knew you could figure it out
bye

>>11554910
>be me, hydrogen atom
>bouncing around in container like the Chad that I am
>constantly smashing into the walls and my fellow hydrogen atoms
>collisions basically random, the net sum of the momentum my brothers and I impart onto the chamber walls is 0
>suddenly a hole appears
>fly out into vacuum
>fuck, accidentally imparted some momentum onto the opposite side of the chamber wall before escaping
>was planning on nullifying it by bouncing off the other side, but then this fucking hole appears out of nowhere
>whatever, I'm in space now lol

>>11554936
>everybody walk the hadronosaur
>>11554946
bye

its kind of a shame we cant extract all the energy of the gas. i suppose thats where clever valves and thruster shapes come into it.

>>11554990
de leval nozzle, yeah
it works the same way but it gets all the molecules moving in roughly the same direction instead of "however they happen to find the nozzle"

>>11555015
so it makes sure nearly every molecule bounces off the container before leaving into space for each explosion of fuel.

>>11554875
Conservation of momentum you absolute retard

>>11554774
>heh i bet you can't calculate THIS if i don't give you any values

https://en.wikipedia.org/wiki/Tsiolkovsky_rocket_equation

>>11554629
Lol you guys are a bunch of nerds.
t.lawfagg making lots of money and fucking your ex high school cruches

>>11555728
nice blog you fag. go to your cheap whores. you arent a bigshot man climb down.

>>11554953
/thread