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Know your gravity from a hole in the ground
oriel36 wrote:
On Nov 9, 7:19*am, Dave Typinski wrote: The latest installment of Typinski procrastinates against anything productive found me investigating gravitational acceleration within the Earth. It doesn't go quite as one might expect... not even in the right direction. *Acceleration goes up and down through the crust, then steadily increases through the bottom half of the mantle the closer you get to that big ol' ball of nickel-iron down there. http://home.alltel.net/trapezium/Essays/EarthGrav.htm -- Dave Good,you would not dare post this topic on sci.astro.amateur so I guess you have learned your lesson pretty quickly . Since you insist... -- Dave |
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Know your gravity from a hole in the ground
On Nov 9, 9:59 am, Dave Typinski wrote:
Since you insist... That's quite an interesting web page. It's conclusion is: since the Earth's core is denser than the mantle and crust, getting closer to that outweighs no longer experiencing the effects of the outer shells of the Earth, so the gravitational force one feels actually increases as one goes downwards. John Savard |
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Know your gravity from a hole in the ground
Quadibloc wrote:
On Nov 9, 9:59 am, Dave Typinski wrote: Since you insist... That's quite an interesting web page. It's conclusion is: since the Earth's core is denser than the mantle and crust, getting closer to that outweighs no longer experiencing the effects of the outer shells of the Earth, so the gravitational force one feels actually increases as one goes downwards. John Savard http://www.splung.com/kinematics/ima...n%20of%20g.png gee increases with depth to 50% radius -- Uncle Al http://www.mazepath.com/uncleal/ (Toxic URL! Unsafe for children and most mammals) http://www.mazepath.com/uncleal/lajos.htm#a2 |
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Know your gravity from a hole in the ground
On Sun, 9 Nov 2008 10:00:39 -0800 (PST), Quadibloc
wrote: That's quite an interesting web page. It's conclusion is: since the Earth's core is denser than the mantle and crust, getting closer to that outweighs no longer experiencing the effects of the outer shells of the Earth, so the gravitational force one feels actually increases as one goes downwards. Which seems intuitively obvious without the detailed analysis. But that analysis is very interesting, as is the actual plot of acceleration versus depth. _________________________________________________ Chris L Peterson Cloudbait Observatory http://www.cloudbait.com |
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Know your gravity from a hole in the ground
On Nov 9, 5:59*pm, Dave Typinski wrote:
oriel36 wrote: On Nov 9, 7:19*am, Dave Typinski wrote: The latest installment of Typinski procrastinates against anything productive found me investigating gravitational acceleration within the Earth. It doesn't go quite as one might expect... not even in the right direction. *Acceleration goes up and down through the crust, then steadily increases through the bottom half of the mantle the closer you get to that big ol' ball of nickel-iron down there. http://home.alltel.net/trapezium/Essays/EarthGrav.htm -- Dave Good,you would not dare post this topic on sci.astro.amateur so *I guess you have learned your lesson pretty quickly . Since you insist... -- Dave Good,just as I thought and predictable. Planetary shape is reliant on rotational dynamics and the specifics of that dynamic,especially the rotation of the viscous composition below the fractured surface crust. Stellar dynamicists have been working with the correlation between maximum Equatorial speed,spherical deviation between Equatorial and polar diameters - http://www.spaceref.com/news/viewpr.html?pid=5604 The missing component is differential rotation as the latitudinal shear bands differ between Equatorial and polar regions depending on maximum Equatorial speed and reducing to zero speed at the poles therefore there is a triumvirate of correlations for any rotating celestial bodies with a viscous composition whether it it stellar plasma or the internal viscous composition of the Earth,these intimate correlations are maximum Equatorial speed,differential rotation and spherical deviation. The 40 Km spherical deviation of the Earth is due to differential rotation between Equatorial and polar regions with the composition and viscosity unknown but most certainly,this dynamic replaces the stationary Earth concept of thermal driven 'convection cells' which require no reference to planetary shape or rotational dynamics. The spherical deviation alone is enough to pursue rotational dynamics in the viscous interior of the Earth however the generation of crust off the entire length of the mid-Atlantic ridge along with the rotational orientation of that second largest geological feature indicates that the rotational mechanism which generates spherical deviation is also responsible for crustal evolution and subsequently into areas such as surface features and short term events such as Earthquakes - http://geomaps.wr.usgs.gov/parks/plt...ticRidgeSM.jpg I have been working alone with differential rotation for so many years now that I would not care to hear how crustal development off the Mid Atlantic ridge works with 'convection cells' ,still,amazing to see the stellar guys working with a rotating composition and miss out on the correlation between a rotating viscous composition of stellar objects with the spherical deviation of the Earth and its viscous interior.In short,to make the Earth and its viscous interior exempt from differential rotation is short of impossible. |
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Know your gravity from a hole in the ground
oriel36 wrote:
On Nov 9, 5:59*pm, Dave Typinski wrote: oriel36 wrote: On Nov 9, 7:19*am, Dave Typinski wrote: The latest installment of Typinski procrastinates against anything productive found me investigating gravitational acceleration within the Earth. It doesn't go quite as one might expect... not even in the right direction. *Acceleration goes up and down through the crust, then steadily increases through the bottom half of the mantle the closer you get to that big ol' ball of nickel-iron down there. http://home.alltel.net/trapezium/Essays/EarthGrav.htm -- Dave Good,you would not dare post this topic on sci.astro.amateur so *I guess you have learned your lesson pretty quickly . Since you insist... -- Dave Good,just as I thought and predictable. Planetary shape is reliant on rotational dynamics and the specifics of that dynamic,especially the rotation of the viscous composition below the fractured surface crust. Stellar dynamicists have been working with the correlation between maximum Equatorial speed,spherical deviation between Equatorial and polar diameters - http://www.spaceref.com/news/viewpr.html?pid=5604 The missing component is differential rotation as the latitudinal shear bands differ between Equatorial and polar regions depending on maximum Equatorial speed and reducing to zero speed at the poles therefore there is a triumvirate of correlations for any rotating celestial bodies with a viscous composition whether it it stellar plasma or the internal viscous composition of the Earth,these intimate correlations are maximum Equatorial speed,differential rotation and spherical deviation. The 40 Km spherical deviation of the Earth is due to differential rotation between Equatorial and polar regions snip DIfferential rotation? At what possible magnitude, a few microradians per century? -- Dave |
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Know your gravity from a hole in the ground
Chris L Peterson wrote:
On Sun, 9 Nov 2008 10:00:39 -0800 (PST), Quadibloc wrote: That's quite an interesting web page. It's conclusion is: since the Earth's core is denser than the mantle and crust, getting closer to that outweighs no longer experiencing the effects of the outer shells of the Earth, so the gravitational force one feels actually increases as one goes downwards. Which seems intuitively obvious without the detailed analysis. But that analysis is very interesting, as is the actual plot of acceleration versus depth. Thanks, guys! -- Dave |
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Know your gravity from a hole in the ground
On Nov 10, 1:05*am, Dave Typinski wrote:
oriel36 wrote: On Nov 9, 5:59*pm, Dave Typinski wrote: oriel36 wrote: On Nov 9, 7:19*am, Dave Typinski wrote: The latest installment of Typinski procrastinates against anything productive found me investigating gravitational acceleration within the Earth. It doesn't go quite as one might expect... not even in the right direction. *Acceleration goes up and down through the crust, then steadily increases through the bottom half of the mantle the closer you get to that big ol' ball of nickel-iron down there. http://home.alltel.net/trapezium/Essays/EarthGrav.htm -- Dave Good,you would not dare post this topic on sci.astro.amateur so *I guess you have learned your lesson pretty quickly . Since you insist... -- Dave Good,just as I thought and predictable. Planetary shape is reliant on rotational dynamics and the specifics of that dynamic,especially the rotation of the viscous composition below the fractured surface crust. Stellar dynamicists have been working with the correlation between maximum Equatorial speed,spherical deviation between Equatorial and polar diameters - http://www.spaceref.com/news/viewpr.html?pid=5604 The missing component is differential rotation as the latitudinal shear bands differ between Equatorial and polar regions depending on maximum Equatorial speed and reducing to zero speed at the poles therefore there is a triumvirate of correlations for any rotating celestial bodies with a viscous composition whether it it stellar plasma or the internal viscous composition of the Earth,these intimate correlations are maximum Equatorial speed,differential rotation and spherical deviation. The 40 Km spherical deviation of the Earth is due to differential rotation between Equatorial and polar regions snip DIfferential rotation? *At what possible magnitude, a few microradians per century? -- Dave Differential rotation is a consequence of fluid dynamics and specifically that pf a rotating celestial object with a viscous composition.This rotational dynamic replaces stationary Earth and thermally driven 'convection cells notion ' as the mechanism for crustal motion by first accounting for the 40Km planetary spherical deviation first and then uses the same mechanism to drive plate tectonics. Now,have you got that much clear - the Earth is round and rotating and this rotation has geological consequences.If you have any doubts about the presence of differential rotation in the rotation of the Earth's viscous interior then may I direct you to flat-Earth theory which you can add to your astrological premises and conclusions for the celestial arena. Again,people who call themselves dynamicists are not doing their jobs and this particular topic based on the geological consequence of rotational dynamics is a joy to work with albeit I do so alone. It is always nice to see a guy arrive with a gung-ho attitude in sci.astro.amateur and then quickly dissolve into another empirical clone and adopt a docile personality, |
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Know your gravity from a hole in the ground
oriel36 wrote:
On Nov 10, 1:05*am, Dave Typinski wrote: oriel36 wrote: On Nov 9, 5:59*pm, Dave Typinski wrote: oriel36 wrote: On Nov 9, 7:19*am, Dave Typinski wrote: The latest installment of Typinski procrastinates against anything productive found me investigating gravitational acceleration within the Earth. It doesn't go quite as one might expect... not even in the right direction. *Acceleration goes up and down through the crust, then steadily increases through the bottom half of the mantle the closer you get to that big ol' ball of nickel-iron down there. http://home.alltel.net/trapezium/Essays/EarthGrav.htm -- Dave Good,you would not dare post this topic on sci.astro.amateur so *I guess you have learned your lesson pretty quickly . Since you insist... -- Dave Good,just as I thought and predictable. Planetary shape is reliant on rotational dynamics and the specifics of that dynamic,especially the rotation of the viscous composition below the fractured surface crust. Stellar dynamicists have been working with the correlation between maximum Equatorial speed,spherical deviation between Equatorial and polar diameters - http://www.spaceref.com/news/viewpr.html?pid=5604 The missing component is differential rotation as the latitudinal shear bands differ between Equatorial and polar regions depending on maximum Equatorial speed and reducing to zero speed at the poles therefore there is a triumvirate of correlations for any rotating celestial bodies with a viscous composition whether it it stellar plasma or the internal viscous composition of the Earth,these intimate correlations are maximum Equatorial speed,differential rotation and spherical deviation. The 40 Km spherical deviation of the Earth is due to differential rotation between Equatorial and polar regions snip DIfferential rotation? *At what possible magnitude, a few microradians per century? -- Dave Differential rotation is a consequence of fluid dynamics and specifically that pf a rotating celestial object with a viscous composition.This rotational dynamic replaces stationary Earth and thermally driven 'convection cells notion ' as the mechanism for crustal motion by first accounting for the 40Km planetary spherical deviation first and then uses the same mechanism to drive plate tectonics. snip You claimed that the Earth exhibited differential rotation, which implied that the crust exhibited this phenomenon, which is clearly not the case in any reasonable fashion. If instead you mean just the fluid core, then it beats me. I know squat about the dynamics of the Earth's core, so your ideas may be as good as anyone else's for all I know. It is always nice to see a guy arrive with a gung-ho attitude in sci.astro.amateur and then quickly dissolve into another empirical clone and adopt a docile personality, The trick is to know what one doesn't know. One is gung ho about things one knows one knows. One defers on things one knows one doesn't know. -- Dave |
#10
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Know your gravity from a hole in the ground
On Nov 10, 8:10*am, Dave Typinski wrote:
oriel36 wrote: On Nov 10, 1:05*am, Dave Typinski wrote: oriel36 wrote: On Nov 9, 5:59*pm, Dave Typinski wrote: oriel36 wrote: On Nov 9, 7:19*am, Dave Typinski wrote: The latest installment of Typinski procrastinates against anything productive found me investigating gravitational acceleration within the Earth. It doesn't go quite as one might expect... not even in the right direction. *Acceleration goes up and down through the crust, then steadily increases through the bottom half of the mantle the closer you get to that big ol' ball of nickel-iron down there. http://home.alltel.net/trapezium/Essays/EarthGrav.htm -- Dave Good,you would not dare post this topic on sci.astro.amateur so *I guess you have learned your lesson pretty quickly . Since you insist... -- Dave Good,just as I thought and predictable. Planetary shape is reliant on rotational dynamics and the specifics of that dynamic,especially the rotation of the viscous composition below the fractured surface crust. Stellar dynamicists have been working with the correlation between maximum Equatorial speed,spherical deviation between Equatorial and polar diameters - http://www.spaceref.com/news/viewpr.html?pid=5604 The missing component is differential rotation as the latitudinal shear bands differ between Equatorial and polar regions depending on maximum Equatorial speed and reducing to zero speed at the poles therefore there is a triumvirate of correlations for any rotating celestial bodies with a viscous composition whether it it stellar plasma or the internal viscous composition of the Earth,these intimate correlations are maximum Equatorial speed,differential rotation and spherical deviation. The 40 Km spherical deviation of the Earth is due to differential rotation between Equatorial and polar regions snip DIfferential rotation? *At what possible magnitude, a few microradians per century? -- Dave Differential rotation is a consequence of fluid dynamics and specifically that pf a rotating celestial object with a viscous composition.This *rotational dynamic replaces stationary Earth and thermally driven 'convection cells notion ' as the mechanism for crustal motion by first accounting for the 40Km planetary spherical deviation first and then uses the same mechanism to drive plate tectonics. snip You claimed that the Earth exhibited differential rotation, which implied that the crust exhibited this phenomenon, which is clearly not the case in any reasonable fashion. I have a very good reason to believe that your reasoning is typical and that is why I alone work with differential rotation as a consequence of fluid dynamics of a rotating celestial body with a viscous interior .The implications are really only for those who can handle rotational dynamics and unfortunately I have yet to meet one person who can apply the lessons learned from observed stellar rotational dynamics and apply the generalized principles which link maximum Equatorial speed with spherical deviation via differential rotation. *If instead you mean just the fluid core, then it beats me. *I know squat about the dynamics of the Earth's core, so your ideas may be as good as anyone else's for all I know. It is always nice to see a guy arrive with a gung-ho attitude in sci.astro.amateur and then quickly dissolve into another empirical clone and adopt a docile personality, The trick is to know what one doesn't know. *One is gung ho about things one knows one knows. *One defers on things one knows one doesn't know. -- Dave Fair reply however the idea is not to conjure up whatever story is needed to reach whatever conclusion is desired,the object is to enjoy a specific arrangement of reasoning that fits observations,case in point,stellar roitational dynamics and differential rotation produces different degrees of spherical deviation depending on maximum equatorial speed,the generalised rules can then be applied to the Earth's viscous interior and from there to geological consequences. |
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