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zuz
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If the Earth gains 250 tons of weight everyday, over the course of hundreds of years wouldn't this alter the weight of a gram?
zuz said:If the Earth gains 250 tons of weight everyday, over the course of hundreds of years wouldn't this alter the weight of a gram?
I wouldn't know where to begin. I never got past high school. My wife was complaining she is gaining weight so I'm just trying to ease her suffering.PeroK said:Yes. Have you tried to calculate by how much?
zuz said:I wouldn't know where to begin. I never got past high school. My wife was complaining she is gaining weight so I'm just trying to ease her suffering.
Newton's gravity equation should be usable by anyone with a high school education. That's all you need.zuz said:I wouldn't know where to begin. I never got past high school.
Yes, so poorly presented it certainly would!Gary Feierbach said:would scare off all but AP Physics and Math high school students.
But losing some mass from the atmosphere will affect only the orbital mechanics, while gathering some space dust to the surface will indeed increase surface gravity...CWatters said:Unfortunately Google suggests the Earth is loosing more mass than it gains so gravity is getting weaker.
Rive said:while gathering some space dust to the surface will indeed increase surface gravity...
Well, if we want to dig that deep then it'll depend on the density of that dust...PeroK said:... decrease the surface gravity. See post #10.
Rive said:Well, if we want to dig that deep then it'll depend on the density of that dust...
ZMacZ said:(also, the Earth's atmo may yet gain as well as lose..dependant on the particles that get blasted off
having enough velocity under a certain vector to really escape the Earth's gravity, without ever returning..)
(however, most particles do return to the fold..)
davenn said:that is incorrect ... if you think it is correct please provide a good citation
Mass loss from the atmosphere each year is ~ 40,000 - 50,000 tonnes round figures depending on different reports
ZMacZ said:Even so, Earth's gravity will keep attracting them, and thus pull them back into the atmosphere,
when the vector is away from Earth.
Then when the intial vector is being changed by Earth's gravity (and it's speed), the particle may yet
'return to the fold' =>return to the atmosphere and be part of it once again..
Only when the particle's vector and speed is great enough to actually escape Earth's gravity,
(either by initial impact or sum off repeated impacts by solar wind particles) does it truly leave
Earth's sphere completely, with a few exceptions like being sent into a path that will later
lead it back to Earth..
davenn said:again, that isn't happening, hence the large tonnage of loss
if you think otherwise ... please provide good references
ZMacZ said:Why should I ? All you did is take someone else's earlier concluded, possibly flawed, calculations
and stated them for fact..
Clearly if the new material is sufficiently dense, the surface gravity will increase with accretion of this new layer. If I did the arithmetic correctly the new material layer must have a density greater than 2/3 the average density of the existing earth. This assumes spherical symmetry.PeroK said:... decrease the surface gravity. See post #10.
As things stand gravity increases as you go below the Earths surface. If you added a further surface layer the same would apply - almost certainty. You'd need the new surface to have unusual density.hutchphd said:Clearly if the new material is sufficiently dense, the surface gravity will increase with accretion of this new layer. If I did the arithmetic correctly the new material layer must have a density greater than 2/3 the average density of the existing earth. This assumes spherical symmetry.
PeroK said:As things stand gravity increases as you go below the Earths surface. If you added a further surface layer the same would apply - almost certainty. You'd need the new surface to have unusual density.
The Earth does not have uniform density. The core is significantly denser than the surface. If the new surface material is similar in density to the current surface density...hutchphd said:I guess I don't understand what you mean by "unusual" density. The average specific density of planet Earth is about 5.5, so the accretion of stuff denser than ~3.7 g/cc (2/3 of 5.5) will cause an increase in g. Do we know what "usual" stuff is?
If that is true then we agree. I would point out that the Earth is a dynamic system (fluid) and the light stuff rises to the surface. Since the Earth was formed by accretion, its average density seems a better estmate for the incoming matter than the surface material which has been fractionally separated by the planet.PeroK said:The Earth does not have uniform density. The core is significantly denser than the surface. If the new surface material is similar in density to the current surface density...
Scientists have observed that the Earth's gravity has been increasing over time by measuring the weight of objects on different parts of the planet and comparing it to the weight of the same objects in the past. Additionally, the Earth's rotation has been slowing down, indicating an increase in gravitational pull.
The increase in Earth's gravity can be attributed to several factors, including the accumulation of space debris and meteorites, the growth of the Earth's inner core, and the redistribution of mass due to plate tectonics.
The increase in Earth's gravity is relatively small and does not pose any immediate danger to humans or the planet. However, it may have an impact on satellite orbits and the Earth's climate over a long period of time.
Yes, there is a limit to how much Earth's gravity can increase. The Earth's gravity is primarily determined by its mass, so it would require a significant increase in mass for a noticeable change in gravitational pull. However, the Earth's mass is constantly changing due to factors such as the movement of tectonic plates and the loss of atmosphere to space.
The increase in Earth's gravity is a natural process and cannot be prevented or slowed down. However, efforts to reduce the amount of space debris and protect the Earth's environment may help to minimize the impact of this increase in the long term.