Can Centripetal Force create Gravity?

oragami

What i'm trying to get at is this, can a spinning framework of rings build enough centripetal force to keep a mass of liquid at the centre of the frame work? And if so what would be the relationship and conditions that would have to be met?
Really need help:|

mathman

A spinning fluid would tend to go the outside, not toward the center. That is the principal of the centrifuge.

oragami

well thank you mathman

oragami

but i ment if the sphere was spinning and like a gas was in it, if most of the gas would travel towards the centre. Please advice

math_04

Is that the whole notion behind artificial gravity in a spacecraft? A spinning spacecraft can reproduce the effects of gravity if I am not mistaken?

Vanadium 50

The gas will not go to the center. Why do you think it would?

HallsofIvy

NO, it wouldn't. It would travel toward the circumference. That was mathman's point.

HallsofIvy

People walking on the inside wall of the spinning space craft (heads pointed toward the axis of rotation) would feel a force pushing them against the space craft. Than can "simulate" gravity but will not be exactly the same. For example, in all but an immense space craft, coriolis forces would be evident.

Chronos

A spinning fluid mass would resemble a galaxy in deep space. Gravity limits the effects of centripetal force.

Wallace

I have no idea what you are trying to say? In a galaxy gravity is what provides the centripedal force that keeps it together??

mathman

In a galaxy the centripetal force is gravity.

Wallace

Yes, that's what I said? At least that was what I intended to say....

JCOX

Yes...Theoreticaly this is possible. For simplisity sake take for example a ring and contain within it two elements... one a gas and other liquid. Let the gas be significantly "heavier" than the fluid. When spinning centripetal force would pull the heavy gas to the outside and leave the fluid (lightier) in the center...Is this even what you are asking???

JCOX

However, I don't know of any Gas heavier than liquid... so in accuality I dont think so

raknath

So is the difference in behavior mainly due to the atomic freedom that exists in gasses

Does this amount to saying that randomly circulating gas molecules cannot be bound by the centripetal force?

How does gravity keep them together, is gravity stronger than centripetal force?

JCOX

Can you please explain in more depth what you are saying? What centripetal force are you refering to??

Rymer

Several levels of issues here:

1) One is called 'miscibility' see: http://en.wikipedia.org/wiki/Miscibility

2) Whether 'randomly circulating gas molecules' are 'bound' depends on their energy and strength of the forces involved.

3) In this particular case, the substances appear to be already contained -- according to the original question. So this should not be an issue.

4) Actually, in the case as presented -- a gas -- the presence of gravity or centripetal or any force is really unimportant. The gas is going to fill the volume.

5) A liquid would only maintain being a liquid in the presence of additional gas (of some kind) filling any extra volume (or vaporize to expand to fill the volume)

6) If the containing object (spaceship) is spinning, the denser material will settle against the outer 'walls'.