He says we let it float off into space
That isn't correct is it? It is lighter than air, but heavier than a vacuum. Doesn't it stick around in the upper atmosphere? We can get it later, when we need it, and have longer ladders than we do now.
( , Tue 11 Dec 2012, 11:27, Reply)
That isn't correct is it? It is lighter than air, but heavier than a vacuum. Doesn't it stick around in the upper atmosphere? We can get it later, when we need it, and have longer ladders than we do now.
( , Tue 11 Dec 2012, 11:27, Reply)
"Heavier"?
Sadly not on a planet with Earth's mass.
Hydrogen & Helium are able to escape the atmosphere...
( , Tue 11 Dec 2012, 11:36, Reply)
Sadly not on a planet with Earth's mass.
Hydrogen & Helium are able to escape the atmosphere...
( , Tue 11 Dec 2012, 11:36, Reply)
I did not
know that. I presumed anything with a mass is heavier than anything without one, and would therefore be trapped.
( , Tue 11 Dec 2012, 11:41, Reply)
know that. I presumed anything with a mass is heavier than anything without one, and would therefore be trapped.
( , Tue 11 Dec 2012, 11:41, Reply)
??? I don't understand... what hasn't got mass?
I think planets the size of Jupiter are massive enough to prevent hydrogen & helium escaping.
Also, *checks wikipedia* how close you are to a star affects it too: so the gas molecules will be more energetic.
( , Tue 11 Dec 2012, 12:00, Reply)
I think planets the size of Jupiter are massive enough to prevent hydrogen & helium escaping.
Also, *checks wikipedia* how close you are to a star affects it too: so the gas molecules will be more energetic.
( , Tue 11 Dec 2012, 12:00, Reply)
I'm not arguing!
I thought a molecule of helium was, by it's very existance, heavier than the vacuum of space and would therefore be trapped by gravity at some height. I'm no expert and if you say I'm wrong, I'm wrong.
( , Tue 11 Dec 2012, 12:06, Reply)
I thought a molecule of helium was, by it's very existance, heavier than the vacuum of space and would therefore be trapped by gravity at some height. I'm no expert and if you say I'm wrong, I'm wrong.
( , Tue 11 Dec 2012, 12:06, Reply)
I think it gets enough escape velocity to get away
Perhaps at the height at which it stops rising up through the stuffmospheres the gravity is insufficient to keep it in...
...maybe. But as you say, bigger ladders!
( , Tue 11 Dec 2012, 12:12, Reply)
Perhaps at the height at which it stops rising up through the stuffmospheres the gravity is insufficient to keep it in...
...maybe. But as you say, bigger ladders!
( , Tue 11 Dec 2012, 12:12, Reply)
If gravity worked like that we'd be permanently stuck to anything more massive than ourselves.
Gravity is very, very weak.
( , Tue 11 Dec 2012, 12:44, Reply)
Gravity is very, very weak.
( , Tue 11 Dec 2012, 12:44, Reply)
It is actually,
and so is my arse, so I guess me sitting around all day is down to SCIENCE.
( , Tue 11 Dec 2012, 13:41, Reply)
and so is my arse, so I guess me sitting around all day is down to SCIENCE.
( , Tue 11 Dec 2012, 13:41, Reply)
Also lots of boring guff about weight and mass not being the same thing.
( , Tue 11 Dec 2012, 12:46, Reply)
( , Tue 11 Dec 2012, 12:46, Reply)