Gravity - Explain this to me... - Page 2 - GoFuckYourself.com

After Shock Media · 11-05-2008, 11:49 PM

Quote:

Originally Posted by d-null

I really don't know much at all about them, but I was reading about how they are theorizing that some extremely massive black holes have a torus orbiting around them

pretty wild stuff to try to imagine

Ya that's getting into theoretical stuff that I can barely if ever wrap my head around when reading about it. I would be as lost as you when it comes down to it. I just know the basics, and that at same time nearly anything is almost possible as long as it only bends the rules and does not break them as we know it.

Plus 51 science talks.

dav3 · 11-06-2008, 12:00 AM

What exactly is one looking at, when looking at the dark spot of a sunspot?

Is it the 'surface' of the sun, or the 'inside' of the sun?

After Shock Media · 11-06-2008, 12:03 AM

Quote:

Originally Posted by dav3

What exactly is one looking at, when looking at the dark spot of a sunspot?

Is it the 'surface' of the sun, or the 'inside' of the sun?

Just a cooler and highly magnetic area on the sun.

Stupid fact, we (our body) radiates more heat per square inch than same area on the sun does.

Deej · 11-06-2008, 12:13 AM

Quote:

Originally Posted by Twistys Tim

What you have described could not happen.

It would be impossible to drill a hole through the earth, as the centre of the earth is molten lava -- and is very hot. So, if you were able to drill a hole through the earth and break through the mantle your hole would fill up with molten lava preventing you from jumping into it.

Quote:

Originally Posted by Verbal

ZOMFG I LOL"d for days looking at that

mynameisjim · 11-06-2008, 12:19 AM

Not sure what you guys are talking about, but a torus shape can exist and does.

gimo33 · 11-06-2008, 12:23 AM

Quote:

Originally Posted by Fucksakes

anywhere I stand on earth I am forced down. that being said what If there was a huge hole right through the earth and I jumped into it?

You'd probably die painfully....

After Shock Media · 11-06-2008, 12:24 AM

Quote:

Originally Posted by mynameisjim

Not sure what you guys are talking about, but a torus shape can exist and does.

When and where?
When it got to that we both said we think or gave opinions. Only time I have even heard of such is in a theory of the shape of the universe itself "doubtful but depends on who you follow" or in a 4-d or larger dimensional universe.

So please do share as I am highly curious now.

Elli · 11-06-2008, 12:25 AM

Nobody mentioned digging a hole to China yet? ;)

qxm · 11-06-2008, 12:26 AM

someone is intrigued after watching that "travel to the center of the earth" movie uh??

</lol>

mynameisjim · 11-06-2008, 12:34 AM

Quote:

Originally Posted by After Shock Media

When and where?
When it got to that we both said we think or gave opinions. Only time I have even heard of such is in a theory of the shape of the universe itself "doubtful but depends on who you follow" or in a 4-d or larger dimensional universe.

So please do share as I am highly curious now.

We may be talking about different things and that's what is causing the confusion.

But a tire inner tube is a simple torus shape. Higher dimension torus shapes may or may not exist though if that is what you guys are referring to.

After Shock Media · 11-06-2008, 12:38 AM

Quote:

Originally Posted by mynameisjim

We may be talking about different things and that's what is causing the confusion.

But a tire inner tube is a simple torus shape. Higher dimension torus shapes may or may not exist though if that is what you guys are referring to.

Talking about appearing naturally in space.

mynameisjim · 11-06-2008, 12:44 AM

Quote:

Originally Posted by After Shock Media

Talking about appearing naturally in space.

Aren't the electromagnetic waves encompassing the earth in the shape of a torus? Not sure about a physical structure but many components on the cellular level in the human body are torus shaped and they seem to do fine when replicating in the low gravity of space when astronauts spend months there.

After Shock Media · 11-06-2008, 12:55 AM

Quote:

Originally Posted by mynameisjim

Aren't the electromagnetic waves encompassing the earth in the shape of a torus? Not sure about a physical structure but many components on the cellular level in the human body are torus shaped and they seem to do fine when replicating in the low gravity of space when astronauts spend months there.

No void in the field.
what in the human body is donut shaped with a hole in the center. Keep in mind the talk was about a true donut shape with a void in the center. I know say some parts of the blood are almost torus or donut shaped but they have a center still.

pigman · 11-06-2008, 12:59 AM

In the middle you would be torn apart and become hot sexy magma.

mynameisjim · 11-06-2008, 01:06 AM

Quote:

Originally Posted by After Shock Media

No void in the field.
what in the human body is donut shaped with a hole in the center. Keep in mind the talk was about a true donut shape with a void in the center. I know say some parts of the blood are almost torus or donut shaped but they have a center still.

I'll have to check into it then. I seem to recall torus shapes during certain cellular divisions but I don't remember the specifics. I suppose that you could argue that it's not really naturally occurring (as defined here) as the membranes of the cells can exert their own forces even though it can happen in zero gravity.

Jim_Gunn · 11-06-2008, 01:08 AM

Quote:

Originally Posted by kandah

Truth is that nobody has any idea what is in the center of the earth and therefore any theories on this subject are just that, theories.

What do you mean "nobody has any idea what is in the center of the earth"? Scientists have a very good idea about what is at the center and the middle of the earth for that matter based on extensive, albeit indirect evidence from a great many disciplines. It's solid metal and liquid metal respectively, not solid rock or magma like someone else in the thread suggested.

Furthermore, a theory when used by a serious scientist is not some willy nilly half-assed guess, but an educated hypothesis based on a lot of evidence. So don't dismiss it that quickly unless you have something better to offer in it's place.

d-null · 11-06-2008, 01:24 AM

Quote:

Originally Posted by mynameisjim

I'll have to check into it then. I seem to recall torus shapes during certain cellular divisions but I don't remember the specifics. I suppose that you could argue that it's not really naturally occurring (as defined here) as the membranes of the cells can exert their own forces even though it can happen in zero gravity.

aren't red blood cells torus shaped?

I guess we had in mind a planetoid of solid matter in the shape of a torus

Jayvis · 11-06-2008, 01:25 AM

Haven't read the rest of this thread yet... because I am lazy, but...

Assuming no air resistance, you would oscillate about the center of the Earth. The gravitational force acts like a Hooke's Law force, since the force you feel is proportional to your position: (distance from center, i.e. r)

If there were air resistance, look up damped oscillators. In one damped oscillator situation, you would oscillate about the center with progressively smaller amplitudes, until you stopped altogether at the center (amplitude 0). In another damped oscillator situation, where the air resistance is really strong, you may not even make it past the center once, you'd just come to a stop. But that all depends on the strength of the air resistance, which I don't think in this situation would be that strong.

Jayvis · 11-06-2008, 01:29 AM

BUTTTTT Lets take air resistance into the equation..

You would fall, with the maximum acceleration being at the start of your fall. The acceleration would zero out at the centre of the planet, but your velocity by then would cause you to continue through, with gravity now trying to pull you in the opposite direction (back to the centre) and with its power increasing the further you went. If we neglect air resistance, your velocity would be *just* sufficient to get you to the surface on the other side of the planet, at which point you would then start falling back down. If we don't neglect air resistance, there will be a damping effect on your yo-yo'ing, causing you to 'stop' further from each surface on every oscillation.

Jayvis · 11-06-2008, 01:38 AM

First off... think of forces.

The force pulling you down is gravity F(g) = Gm1m2/r

Drag force is proportional to the velocity^2 (double velocity, quadruple drag).

Now, you will accelerate as you move down, but the force will become increasingly smaller as you approach the center (the summation of all the forces from all the mass particles is decreasing).

What will happen is you will accelerate downwards until you reach terminal velocity within your fluid (air likely). This will slowly decrease as the force will decrease.

You will decelerate as terminal velocity drops (your drag force is greater than your gravity force).

Then once you reach the center, you will start to decelerate even further until you stop and switch direction.

With aerodynamic drag acting as a damper (this is a 2nd order diff eqn), you will likely only get a fraction of the distance past the center and slightly oscillate around that until you stop in the center. The damping is actually greater than you would think (on a large scale)

Without drag, you would actually just oscillate back and forth forever.

Make sense?

SeanHart · 11-06-2008, 01:40 AM

Quote:

Originally Posted by - Jesus Christ -

Fuck it all. I dont want to argue. I should have just said this is not google and not posted the link at all... I guess. Since my point was he should have searched himself.

and now im already waiting WAY to mech energy on this.

That's what you get for trying to be helpful!

After Shock Media · 11-06-2008, 01:43 AM

Thanks people been fun this evening, my muscle relaxers and pain pills are kicking in.
Enjoyed it d-null, jim, fucksakes, other jim, everyone. (except kandah

)

Jayvis · 11-06-2008, 01:55 AM

Annnnnndddd, one last post, although my other posts should be pretty responsive: Assuming the usual optimal conditions, no friction etc., you would oscillate and have your maximum speed obviously in the center with over 17000miles/hour.
http://hyperphysics.phy-astr.gsu.edu.../earthole.html

Adultnet · 11-06-2008, 02:06 AM

If you won?t loss speed you will continue to exchange from one side of the hole to the other.

d-null · 11-06-2008, 02:12 AM

Quote:

Originally Posted by Jayvis

Annnnnndddd, one last post, although my other posts should be pretty responsive: Assuming the usual optimal conditions, no friction etc., you would oscillate and have your maximum speed obviously in the center with over 17000miles/hour.
http://hyperphysics.phy-astr.gsu.edu.../earthole.html

awesome, thanks for the calculation

curious what the frequency of the oscillation would be ie. how long it would take for you to fall from this hemisphere to the surface of China, and then back again (hypothetically speaking with no air involved etc :P )

Jdoughs · 11-06-2008, 02:20 AM

BBC Space has a spectacular series on space.

Here is Black Holes, it touches lots on gravity, and has one of the most current theories on black holes.

http://www.veoh.com/videos/v257653TN...8436&rank= 10

The entire series is awe inspiring.

Jayvis · 11-06-2008, 09:32 AM

Had to this up one more time:

All objects are attracted to the center of the Earth.

If the hole runs through the center it will be rather like pulling a pendulum to one side and allowing it to settle, the pendulum oscillating back and forth. Thus you would fall in a straight line accelerating towards the center then deccelerating away from the centre until you, almost reach the other side of the earth and your velocity is zero. Then you will be drawn back, accelerating and deccelerating again, to almost where you originally fell. Each journey back and forth like the pendulum gets shorter and shorter until you settle stationery at the center of the earth. This is due to the fact that there is air in the hole which provides friction or drag. Such motion is called Damped Harmonic Motion (if the hole was in vacuum then your would not settle at the centre but would continue to execute a full simple harmonic motion)

Holes not going through the center have similar effects but you would fall in a curve and bump the side of the hole half way down, as the earth trys to attract you to its centre. You will again end up half way down the hole but stuck to the side which is closest to the earth's center.

http://www.physlink.com/education/askexperts/ae52.cfm

pornguy · 11-06-2008, 09:35 AM

Well I hear there is a penalty if you run into any Chinese people on your way though.

11-06-2008, 12:00 AM	#52
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11-06-2008, 12:19 AM	#55
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11-06-2008, 12:25 AM	#58
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11-06-2008, 12:26 AM	#59
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11-06-2008, 12:59 AM	#64
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11-06-2008, 01:25 AM	#68
Jayvis Confirmed User Industry Role: Join Date: Nov 2005 Location: Cincinnati, Ohio Posts: 5,427	Haven't read the rest of this thread yet... because I am lazy, but... Assuming no air resistance, you would oscillate about the center of the Earth. The gravitational force acts like a Hooke's Law force, since the force you feel is proportional to your position: (distance from center, i.e. r) If there were air resistance, look up damped oscillators. In one damped oscillator situation, you would oscillate about the center with progressively smaller amplitudes, until you stopped altogether at the center (amplitude 0). In another damped oscillator situation, where the air resistance is really strong, you may not even make it past the center once, you'd just come to a stop. But that all depends on the strength of the air resistance, which I don't think in this situation would be that strong.

11-06-2008, 01:29 AM	#69
Jayvis Confirmed User Industry Role: Join Date: Nov 2005 Location: Cincinnati, Ohio Posts: 5,427	BUTTTTT Lets take air resistance into the equation.. You would fall, with the maximum acceleration being at the start of your fall. The acceleration would zero out at the centre of the planet, but your velocity by then would cause you to continue through, with gravity now trying to pull you in the opposite direction (back to the centre) and with its power increasing the further you went. If we neglect air resistance, your velocity would be just sufficient to get you to the surface on the other side of the planet, at which point you would then start falling back down. If we don't neglect air resistance, there will be a damping effect on your yo-yo'ing, causing you to 'stop' further from each surface on every oscillation.

11-06-2008, 01:38 AM	#70
Jayvis Confirmed User Industry Role: Join Date: Nov 2005 Location: Cincinnati, Ohio Posts: 5,427	First off... think of forces. The force pulling you down is gravity F(g) = Gm1m2/r Drag force is proportional to the velocity^2 (double velocity, quadruple drag). Now, you will accelerate as you move down, but the force will become increasingly smaller as you approach the center (the summation of all the forces from all the mass particles is decreasing). What will happen is you will accelerate downwards until you reach terminal velocity within your fluid (air likely). This will slowly decrease as the force will decrease. You will decelerate as terminal velocity drops (your drag force is greater than your gravity force). Then once you reach the center, you will start to decelerate even further until you stop and switch direction. With aerodynamic drag acting as a damper (this is a 2nd order diff eqn), you will likely only get a fraction of the distance past the center and slightly oscillate around that until you stop in the center. The damping is actually greater than you would think (on a large scale) Without drag, you would actually just oscillate back and forth forever. Make sense?

11-06-2008, 01:43 AM	#72
After Shock Media It's coming look busy Join Date: Mar 2001 Location: "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn". Posts: 35,299	Thanks people been fun this evening, my muscle relaxers and pain pills are kicking in. Enjoyed it d-null, jim, fucksakes, other jim, everyone. (except kandah ) __________________ [email protected] ICQ:135982156 AIM: Aftershockmed1a MSN: [email protected]

11-06-2008, 01:55 AM	#73
Jayvis Confirmed User Industry Role: Join Date: Nov 2005 Location: Cincinnati, Ohio Posts: 5,427	Annnnnndddd, one last post, although my other posts should be pretty responsive: Assuming the usual optimal conditions, no friction etc., you would oscillate and have your maximum speed obviously in the center with over 17000miles/hour. http://hyperphysics.phy-astr.gsu.edu.../earthole.html

11-06-2008, 02:06 AM	#74
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11-06-2008, 02:20 AM	#76
Jdoughs Confirmed User Industry Role: Join Date: Mar 2004 Location: Great White North Posts: 5,794	BBC Space has a spectacular series on space. Here is Black Holes, it touches lots on gravity, and has one of the most current theories on black holes. http://www.veoh.com/videos/v257653TN...8436&rank= 10 The entire series is awe inspiring. __________________ LinkSpun - Premier Adult Link Trading Community - ICQ - 464/\281/\250 Be Seen By New Webmasters/Affiliates * Target out webmasters/affiliates based on niches your sites are for less than $20 a month. AmeriNOC - Proudly hosted @ AmeriNOC!

11-06-2008, 09:32 AM	#77
Jayvis Confirmed User Industry Role: Join Date: Nov 2005 Location: Cincinnati, Ohio Posts: 5,427	Had to this up one more time: All objects are attracted to the center of the Earth. If the hole runs through the center it will be rather like pulling a pendulum to one side and allowing it to settle, the pendulum oscillating back and forth. Thus you would fall in a straight line accelerating towards the center then deccelerating away from the centre until you, almost reach the other side of the earth and your velocity is zero. Then you will be drawn back, accelerating and deccelerating again, to almost where you originally fell. Each journey back and forth like the pendulum gets shorter and shorter until you settle stationery at the center of the earth. This is due to the fact that there is air in the hole which provides friction or drag. Such motion is called Damped Harmonic Motion (if the hole was in vacuum then your would not settle at the centre but would continue to execute a full simple harmonic motion) Holes not going through the center have similar effects but you would fall in a curve and bump the side of the hole half way down, as the earth trys to attract you to its centre. You will again end up half way down the hole but stuck to the side which is closest to the earth's center. http://www.physlink.com/education/askexperts/ae52.cfm

11-06-2008, 09:35 AM	#78
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