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san D
Does gravity depends on atmosphere
san D said:Does gravity depends on atmosphere
Read post #6. You're a day latedavenn said:no, but the opposite is true when it comes to a planet having an atmosphere.
Without significant mass, the planetary body won't have a strong enough gravity to retain an atmosphere
phinds said:Read post #6. You're a day late :)
You are right. Well, a crushing rather than an implosion but I see that you were thinking in the right direction.JLowe said:Perhaps he wants to know if the effect of gravity feels stronger with greater atmospheric pressure. I'm not sure it works like that, I think a strong gravitational pull would crush you into the ground whereas a high atmospheric pressure would be more like an implosion. Or am I wrong?
Did you think the Earth's atmosphere just goes on forever into the universe? Of course it tapers off as you get higher, as does the force of gravity. What is confusing about that?san D said:Confused about this the gravity changes when we move out of the surface of Earth at the same time we can observe atmosphere also changes that's why i confused
san D said:I will agree that gravity depends on mass only ...then the gravity of uranus must be greater than Earth's gravity bcz uranus is bigger than Earth but it's not why...?
Gravity doesn't depend on mass only, but also on distance from the source. The gravitational force equation shows that clearly:san D said:I will agree that gravity depends on mass only ...then the gravity of uranus must be greater than Earth's gravity bcz uranus is bigger than Earth but it's not why...?
As I said: gravity depends only on mass. The gravitational force experienced at some point depends additionally on its distance from the mass. A fine distinction perhaps, but a distinction nonetheless.Bandersnatch said:Gravity doesn't depend on mass only, but also on distance from the source. The gravitational force equation shows that clearly:
Could you clarify what you mean by gravity?DaveC426913 said:As I said: gravity depends only on mass. The gravitational force experienced at some point depends additionally on its distance from the mass. A fine distinction perhaps, but a distinction nonetheless.
JLowe said:That is probably surface gravity you're thinking about, which can be greater for a less massive object because the surface is farther away from the center of gravity in the massive object.
Bandersnatch said:The answer could be just as well 'yes'. It all depends on what you actually mean.
Why won't you try being a bit more descriptive? What exactly is it you want to find?
Bandersnatch said:Could you clarify what you mean by gravity?
san D said:Does gravity depends on atmosphere
Gravity is an intrinsic property of anything with mass.Bandersnatch said:Could you clarify what you mean by gravity?
With the caveat that you've just made me doubt mine...DaveC426913 said:But now you're causing me to doubt my convictions... :s
Bandersnatch said:... Isn't it just synonymous with mass?
san D said:I got clear idea frnz gravity depends on density of the object Uranus is hav less density than earth
This is only correct when talking about gravity(force or field) far away from the source. This whole discussion is about surface gravity, even though that might have not been clear when it started. For surface gravity that statement doesn't hold as you can't change density and keep mass constant without changing radius, so let's not confuse the OP needlessly.JLowe said:Not entirely. The density of the Earth could change but it would have the exact same gravity as long as it's mass stayed the same.
Oh, you know what I meant, Om. We're all simple people here, talking about ye olde Newtonian ideas and none of that GR woo-woo.OmCheeto said:Noooooo! Don't say "MASS"! It'll attract those stress-energy-tensor fellows, with their "momentum warps space too" mumbo jumbo...
And then my head will explode, again.
He commented on the strength of Earth's gravity varying at different places. This is not really a density issue but a distance from the center issue. Otherwise, the strength of gravity would be weaker if you were in a boat then on land at sea level.Bandersnatch said:This is only correct when talking about gravity(force or field) far away from the source. This whole discussion is about surface gravity, even though that might have not been clear when it started. For surface gravity that statement doesn't hold as you can't change density and keep mass constant without changing radius, so let's not confuse the OP needlessly.
You mean something like these?JLowe said:He commented on the strength of Earth's gravity varying at different places. This is not really a density issue but a distance from the center issue. Otherwise, the strength of gravity would be weaker if you were in a boat then on land at sea level.
Bandersnatch said:You mean something like these?
http://en.wikipedia.org/wiki/Gravity_anomaly
http://en.wikipedia.org/wiki/Mass_concentration_(astronomy)
Gravity still exists in space, but it is not as strong as on Earth due to the lack of atmosphere and other factors. Objects in space are still attracted to each other, but they may appear to float because they are constantly falling towards each other at the same rate.
Yes, gravity is affected by the atmosphere. The more mass an object has, the stronger its gravitational pull will be. The Earth's atmosphere also plays a role in the strength of gravity, as it helps to keep objects on the surface.
No, gravity cannot be manipulated or controlled. It is a fundamental force of nature that cannot be changed or turned off. However, the effects of gravity can be counteracted through the use of technology, such as rockets and spacecraft.
Gravity plays a major role in creating tides on Earth. The gravitational pull of the moon and sun on the Earth's oceans causes the water to bulge, creating high and low tides. The Earth's rotation also plays a role in the tides, as it creates a centrifugal force that counteracts the gravitational pull.
No, gravity cannot exist without mass. According to Einstein's theory of general relativity, mass and energy are equivalent, and both are necessary for gravity to exist. Without mass, there would be no gravitational pull between objects.