How do gravimeters work in the Flat Earth?

Locally is the things that are moving with you. 

Locally is the things that are moving with you.

Got to go. I will show you how it was proven. later..

Einstein never said that time slowed down locally.  It only appears to slow down for someone outside of your frame of reference.

It does slow down for the moving FOR, not just appear to slow down.

Starman never proved me wrong. 

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

Why are you calling Einstein and all of physics liars? 

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

What's to explain? This is exactly how it works under Relativity. Nothing can go faster than the speed of light, so technically if you were able to make a length of steel say from here to a point 1 light year away, any way you moved the rod here wouldn't be seen on the other end for a year as the change moved the length of the rod.

Either that or you just made something move faster than the speed of light and broke the universe as we know it in half. So take your pick.

That's just compression... But a cue stick would break under it's own weight... Duh...

Bad analogy...

That's just compression... But a cue stick would break under it's own weight... Duh...

Bad analogy...

Yes the materials are unlikely to handle the strain, but that doesn't make the thought experiment less valid as far as it goes.

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

What's to explain? This is exactly how it works under Relativity. Nothing can go faster than the speed of light, so technically if you were able to make a length of steel say from here to a point 1 light year away, any way you moved the rod here wouldn't be seen on the other end for a year as the change moved the length of the rod.

Either that or you just made something move faster than the speed of light and broke the universe as we know it in half. So take your pick.

Give me your logic again... If I have a physical object that is 1 light year in length, and one end is moved, lets say 1 meter at 1 meter a second....

The electrons within would transfer the information and repel from each other at the speed of whatever, they would compress and then repel at the speed of whatever and the other end would eventually move... nothing faster than light.... If You had an electrically conductive material that was 1 light year long and you sent an electric current down it, that would move at the speed of light as well...


btw, nothing on this site has ever gotten me to "ROTFLMAO"

We are being a bit dramatic, aren't we?

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

I think the 'push' would propagate at the speed of sound for whatever material the cue is made of. So for all materials known this would actually take a lot longer than a 'couple of seconds' to get to the moon.

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

What's to explain? This is exactly how it works under Relativity. Nothing can go faster than the speed of light, so technically if you were able to make a length of steel say from here to a point 1 light year away, any way you moved the rod here wouldn't be seen on the other end for a year as the change moved the length of the rod.

Either that or you just made something move faster than the speed of light and broke the universe as we know it in half. So take your pick.

Wouldn't be seen of course, but why would it not move instantly end to end?
You are moving it say 6" not the length +6"

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

Nothing about seeing it move. 
Just curious if jroa invented yet another magical force or just forgot to say see it move instead of it moves.

Interesting aspect that I've never cosidered.

Quote from: Curious Squirrel on September 26, 2017, 12:11:52 PM

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

What's to explain? This is exactly how it works under Relativity. Nothing can go faster than the speed of light, so technically if you were able to make a length of steel say from here to a point 1 light year away, any way you moved the rod here wouldn't be seen on the other end for a year as the change moved the length of the rod.

Either that or you just made something move faster than the speed of light and broke the universe as we know it in half. So take your pick.

Wouldn't be seen of course, but why would it not move instantly end to end?
You are moving it say 6" not the length +6"

Quote

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

Nothing about seeing it move. 
Just curious if jroa invented yet another magical force or just forgot to say see it move instead of it moves.

Interesting aspect that I've never cosidered.

It's got nothing to do with being able to see it. The push would move at the speed of sound, not instantaneously. It would likely take several hours, depending on the material involved.

Quote from: Curious Squirrel on September 26, 2017, 12:11:52 PM

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

What's to explain? This is exactly how it works under Relativity. Nothing can go faster than the speed of light, so technically if you were able to make a length of steel say from here to a point 1 light year away, any way you moved the rod here wouldn't be seen on the other end for a year as the change moved the length of the rod.

Either that or you just made something move faster than the speed of light and broke the universe as we know it in half. So take your pick.

Give me your logic again... If I have a physical object that is 1 light year in length, and one end is moved, lets say 1 meter at 1 meter a second....

The electrons within would transfer the information and repel from each other at the speed of whatever, they would compress and then repel at the speed of whatever and the other end would eventually move... nothing faster than light.... If You had an electrically conductive material that was 1 light year long and you sent an electric current down it, that would move at the speed of light as well...


btw, nothing on this site has ever gotten me to "ROTFLMAO"

We are being a bit dramatic, aren't we?

Welcome to relativity.
https://physics.stackexchange.com/questions/21122/if-i-move-a-long-solid-stick-can-i-send-message-fastest-than-light
https://www.spaceanswers.com/deep-space/whats-the-nearest-solar-system-to-our-own/
https://www.quora.com/If-you-pull-a-stick-that-is-2-light-years-long-would-the-other-end-move-at-the-exact-time-you-pulled-it
Few other areas involved in this, but Copper Knickers has the right end of it as well. It would likely propagate at the speed of sound within that material. Likely tearing the stick apart if made with just about anything we know of today that's rigid enough to call a 'stick' but that's why it's more of a mental exercise.

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!
I just have hear more about this concept.

Can you explain please?

Why are you calling Einstein and all of physics liars?

No, he is not! That would be you trashing science.

The velocity of propagation in your "cue stick" is the velocity of sound in that material.
A "cue stick" is usually made mainly from timber and the velocity of sound in timber varies from about 3360 m/s to 5450 m/s.

You make no mention of what sort of "cue stick", but they are usually made of a very hard timber,

A typical two piece cue for pocket billiards is usually made mostly of hard or rock maple

A hand push is a very low frequency disturbance and all the data I can find is under musical instrument timbers, and the velocity of sound in rock maple is about 4200 m/s so let's use that.

It will be a far better estimate than you silly "couple of seconds".

The distance from the real earth to the real moon averages about 384,400 km so your push
So, jroa, apart from the absurdity of your analogy, care to revise your "couple of seconds".

But, even on your pizza planet we are told that the moon is about 3000 miles above the earth and  "Moon and Sun, which are constantly wobbling up and down and exchange altitudes"  (Whoever wrote that trash?).

So even to you moon the push would take about (depending on where in the wobble it is) 4,828,000/4200 =  about 1150 secs  or about 19 min.

Do you enjoy looking foolish, or are you paid to play the idiot? - sort of comic relief act. - maybe it's those potassium tablets?

Seriously, why you don't make some constructive posts sometime, instead of continually playing the smart Aleck?

Quote from: RocketSauce on September 26, 2017, 12:18:14 PM

Quote from: Curious Squirrel on September 26, 2017, 12:11:52 PM

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

What's to explain? This is exactly how it works under Relativity. Nothing can go faster than the speed of light, so technically if you were able to make a length of steel say from here to a point 1 light year away, any way you moved the rod here wouldn't be seen on the other end for a year as the change moved the length of the rod.

Either that or you just made something move faster than the speed of light and broke the universe as we know it in half. So take your pick.

Give me your logic again... If I have a physical object that is 1 light year in length, and one end is moved, lets say 1 meter at 1 meter a second....

The electrons within would transfer the information and repel from each other at the speed of whatever, they would compress and then repel at the speed of whatever and the other end would eventually move... nothing faster than light.... If You had an electrically conductive material that was 1 light year long and you sent an electric current down it, that would move at the speed of light as well...


btw, nothing on this site has ever gotten me to "ROTFLMAO"

We are being a bit dramatic, aren't we?

Welcome to relativity.
https://physics.stackexchange.com/questions/21122/if-i-move-a-long-solid-stick-can-i-send-message-fastest-than-light
https://www.spaceanswers.com/deep-space/whats-the-nearest-solar-system-to-our-own/
https://www.quora.com/If-you-pull-a-stick-that-is-2-light-years-long-would-the-other-end-move-at-the-exact-time-you-pulled-it
Few other areas involved in this, but Copper Knickers has the right end of it as well. It would likely propagate at the speed of sound within that material. Likely tearing the stick apart if made with just about anything we know of today that's rigid enough to call a 'stick' but that's why it's more of a mental exercise.

Thanks for the link, I may have a new favorite Relativity thought experiment.   Akin to the "if the sun disappears would the planets orbit change instantly " one but even more unintuitive if that's possible.

So, yeah, back to the topic. Gravimeters, how do they work in the FE with UA?

So, yeah, back to the topic. Gravimeters, how do they work in the FE with UA?

I have yet to see any answers the make any sense at all of the variation of gravity with latitude, altitude or east-west motion.
Flat Earthers should look at:and

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

I think the 'push' would propagate at the speed of sound for whatever material the cue is made of. So for all materials known this would actually take a lot longer than a 'couple of seconds' to get to the moon.

speed of sound?

Quote from: Copper Knickers on September 26, 2017, 12:20:37 PM

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

I think the 'push' would propagate at the speed of sound for whatever material the cue is made of. So for all materials known this would actually take a lot longer than a 'couple of seconds' to get to the moon.

speed of sound?

You do understand that sound is a mechanical pressure wave propagating through a medium, don't you?

Quote from: Copper Knickers on September 26, 2017, 12:20:37 PM

Quote from: NAZA on September 26, 2017, 12:01:37 PM

Quote from: jroa on April 30, 2014, 12:41:45 AM

If you had a cue stick that reached from the Earth to the RE moon and you were somehow able to push it, the rear part of the stick would move a couple of seconds before the tip end of the stick moves.

ROFLMAO!

I just have hear more about this concept.

Can you explain please?

I think the 'push' would propagate at the speed of sound for whatever material the cue is made of. So for all materials known this would actually take a lot longer than a 'couple of seconds' to get to the moon.

speed of sound?

Yes, speed of sound. It would propagate via a compression wave, surely? And that would travel at the speed of sound for the material.

I'm sure we are just communicating differently, so are saying that a material if pushed from the back....... cannot be accelerated faster than the speed of sound?



For instance.... Instead of a 1 light year long object, lets go down to.... A cast Iron Rod, 3 feet long 1 inch in diameter... you pick the shape...


If I apply an accelerator to the rear of the Iron Rod that is greater than the speed of sound.... The opposite end of this cast Iron Rod.... does what again?

Because I immediately think of ballistics... That goes from 0 to fast as hell and the ballistic doesn't loose shape due to being shot...

I'm sure we are just communicating differently, so are saying that a material if pushed from the back....... cannot be accelerated faster than the speed of sound?



For instance.... Instead of a 1 light year long object, lets go down to.... A cast Iron Rod, 3 feet long 1 inch in diameter... you pick the shape...


If I apply an accelerator to the rear of the Iron Rod that is greater than the speed of sound.... The opposite end of this cast Iron Rod.... does what again?

Because I immediately think of ballistics... That goes from 0 to fast as hell and the ballistic doesn't loose shape due to being shot...

Important piece: The speed of sound varies depending upon the medium.

The ballistic definitely loses shape some due to being shot *but* it's rigidness and small size prevent it from being deformed due to this. Again, we're talking about relativity here, things get weird, especially because we're dealing with very large objects.

Technically that three foot rod? When you pushed the bottom it took a small amount of time before the top moved. This time would be equal to however long it would take sound to travel that distance within that rod. https://en.wikipedia.org/wiki/Speed_of_sound#Speed_of_sound_in_solids

you could be right....


...I'm honestly not going to research it... I'm spent for today... maybe tomorrow i'll hate myself less and get back on here.

I'm sure we are just communicating differently, so are saying that a material if pushed from the back....... cannot be accelerated faster than the speed of sound?

For instance.... Instead of a 1 light year long object, lets go down to.... A cast Iron Rod, 3 feet long 1 inch in diameter... you pick the shape...

If I apply an accelerator to the rear of the Iron Rod that is greater than the speed of sound.... The opposite end of this cast Iron Rod.... does what again?

Because I immediately think of ballistics... That goes from 0 to fast as hell and the ballistic doesn't loose shape due to being shot...

You raise some interesting points. The speed of sound limits how soon the far end of an object starts moving when the other end receives a force. This doesn't mean that objects can't be accelerated to high speeds but it does seem to limit how much sustained acceleration an object can take before distortion breaks it up.

Taking your 3 ft iron rod as an example, the speed of sound in iron is about 15000 ft/s, so if a force is applied to one end the other end will start to move after 3/15000 = 0.0002 seconds. If we apply an acceleration of say 100 ft/s ² (about 3g) to one end, then after 0.0002 seconds that end will have moved only 0.000002 ft (using s = 0.5at²) so the rod will be that amount shorter. However, if the acceleration is maintained, then the rod will continue to get shorter because one end has a 'head start' and so is always moving faster. My rough calculations suggest that after only a minute of this acceleration the rod would already be several inches shorter. This seems quite extreme to me. There may be other factors at play.
 
If we consider a bullet an inch long, say, then the front will start moving about 0.000006 seconds after the back. Assuming acceleration in a rifle of 10⁶ ft/s² for 2 milliseconds then the bullet will be about a tenth shorter when it leaves the barrel. This seems reasonable. Again, these are rough calculations. Others' are welcome.