if there was no gravity, would heat still rise?

[yorkie_chris]

Originally Posted by Scoobs

Gravity has nothing to do with the radiation of heat. If it were possible to weld in a vacuum, then there would be no heat transmission.

it's possible to weld in a vacuum

Dunno the answer to your question but i do know that with no gravity when nekkid me nuts would get in the way! would be like having a constant semi with ya testicles either side of it too. It would look a bit like standing on ya head nekkid. Try it.

Also the term 'its a floater' would be more realistically suited.

HTH

Thor is on the right lines. The lack of gravity would prevent convection. Other means of heat transfer along a hot----->cold gradient would still work.

yeah you can weld in a vacuum, cos i'm listening to the Halo series of audio books at the mo and they just did it.

[keith_d]

Originally Posted by Jabba

Thor is on the right lines. The lack of gravity would prevent convection. Other means of heat transfer along a hot----->cold gradient would still work.

Yes, but he forgot to mention that in conducting solids there's not just lattice vibration, there's electrons carrying energy about too.

What a bunch of smartarses we have on here

[MisterTommyH]

Originally Posted by keith_d

Heat doesn't rise!

Keith.

Lol. That was my physics teachers favourite rant. So much so we used to ask if heat rises every lesson.

"heat does not rise! Hot fluid rises!"

But what he said, 'it' rises because the particles are less dense (I.e. Less massive) and therefore the more dense (cooler) part if the fluid is more attracted to the earth.

Just because you are in space doesn't mean theres no gravity, how do you think we orbit the sun. The hot fluid would radiate away from whichever body caused the greatest gravitational force, although in practice the forces would be so negligible you would get a uniform distribution.

On the other hand if you mean if gravity didn't exist you're talking about changing all the laws of physics... Would heat even be possible in that 'world'?

[Paul the 6th]

So my engine casing should be alright when I take my Chinese Sanya sy125 for an interspacial adventure & realise I could do with a bit more oomph?

[Viney]

Would a vaccum cleaner work in a Vaccum, thats my question

[Paul the 6th]

working on another conference at the barbican so I'll prolly post another random question later today...