Gravity

[NikolaeVarius]

Originally posted by: Eeezee

Originally posted by: gururu2
black holes do not spin afaik and they emit immense gravitational fields. i bet that is something you knew!

Black holes can spin, there is observational evidence suggesting that there are some spinning black holes (with smaller event horizons)

I thought all black holes spun at an incredibly fast pace. At higher than Pulsar speeds.

 

[Random Variable]

Originally posted by: legoman666

Originally posted by: Random Variable

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

Every object with mass is attracted to every other object with mass.

I'm trying to think of an elegant way to say that's why your mom is attracted to my penis without sounding crude but I came up blank.

Stop pretending to have a penis.

 

[Inferno0032]

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

I was waiting for someone to say something about centrifugal force, there really is no such thing, more of a concept. It is still only the centripetal force holding you in the circular motion, however, the feeling that we are being "pushed" into the wall is what we refer to as centrifugal force, and, in fact, doesn't exist, as the only thing making us feel like we are going into the wall is inertia, and inertia is not a force.

 

[Born2bwire]

Originally posted by: Inferno0032

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

I was waiting for someone to say something about centrifugal force, there really is no such thing, more of a concept. It is still only the centripetal force holding you in the circular motion, however, the feeling that we are being "pushed" into the wall is what we refer to as centrifugal force, and, in fact, doesn't exist, as the only thing making us feel like we are going into the wall is inertia, and inertia is not a force.

http://xkcd.com/123/

 

[Jeff7]

Damn man....I knew the basics of nuclear fusion and how the sun worked when I was in elementary school.

 

[Inferno0032]

Originally posted by: Born2bwire

Originally posted by: Inferno0032

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

I was waiting for someone to say something about centrifugal force, there really is no such thing, more of a concept. It is still only the centripetal force holding you in the circular motion, however, the feeling that we are being "pushed" into the wall is what we refer to as centrifugal force, and, in fact, doesn't exist, as the only thing making us feel like we are going into the wall is inertia, and inertia is not a force.

http://xkcd.com/123/

Well done! +1 for you on your interwebz skillz

 

[Random Variable]

The centrifugal force exists in the accelerating reference frame.

 

[Born2bwire]

Originally posted by: Inferno0032

Originally posted by: Born2bwire

Originally posted by: Inferno0032

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

I was waiting for someone to say something about centrifugal force, there really is no such thing, more of a concept. It is still only the centripetal force holding you in the circular motion, however, the feeling that we are being "pushed" into the wall is what we refer to as centrifugal force, and, in fact, doesn't exist, as the only thing making us feel like we are going into the wall is inertia, and inertia is not a force.

http://xkcd.com/123/

Well done! +1 for you on your interwebz skillz

I've found that xkcd holds many answers to life.

 

[The Boston Dangler]

Originally posted by: Analog

Originally posted by: The Boston Dangler

Originally posted by: gururu2
black holes do not spin afaik and they emit immense gravitational fields. i bet that is something you knew!

black holes spin incredibly fast. they also emit muon lasers (maser) at at least one pole. afaik, the energy and mass of the maser does not come close to the energy and mass being eaten by the black hole.

A Maser is a Microwave Laser, and they don't emanate from inside the black hole, as even light cannot escape its gravity, but from the disc of superheated gas that is falling into the black hole.
See below:

i don't know where i got muon from...

if the maser is produced by, and perpendicular to the rotating axis of, the accretion disk, then what is the beam i've seen projected from the poles? or is that just a line through the axis of a sphere?

edit:
classical or fancy, which is correct?

 

[ForumMaster]

Originally posted by: Random Variable

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

Every object with mass is attracted to every other object with mass.

umm, yeah. that's what i said.

 

[RESmonkey]

Mass bends the fabric of space time.

 

[JohnCU]

GRAVITYYYYYYY
is workin against meeeeeee

 

[her209]

Originally posted by: Random Variable
Every object with mass is attracted to every other object with mass.

Sounds like an awesome pickup line.

 

[BoomerD]

Gravity sux...

 

[Fritzo]

Gravity is a cool concept. Any object with mass is going to "press" on the fabric of space/time. The more mass an object has, the more of a dimple it's going to make in the fabric. This indentation the object makes is gravity.

Here's a good example: Place a bowling ball on a bed. See how it makes a crater around it? Now, place a pea near the bowling ball, and it will fall toward it. Gravity works in a very similar way.

 

[compman25]

wavy gravy

 

[Locut0s]

Fail

 

[Modelworks]

Gravity is so yesterday.
Dark energy is where its at !
http://en.wikipedia.org/wiki/Dark_energy

 

[DrPizza]

Originally posted by: Random Variable

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

Every object with mass is attracted to every other object with mass.

Electrons have mass. They're repelled by other electrons
Sure, the gravitational force of attraction can be calculated between them, but it's quite pathetic compared to the other forces. (Just being picky.)

 

[Fritzo]

Originally posted by: DrPizza

Originally posted by: Random Variable

Originally posted by: ForumMaster

Originally posted by: torpid
Well, to be fair, you can simulate gravity by having people stand inside of a sphere or cylinder that is spinning.

true, but then the simulated gravity is the centrifugal force. every object has a gravity field. take for example, an astronaut. if there was no stronger field of gravity in his vicinity, his tools would be attracted to him due to his field of gravity.

Every object with mass is attracted to every other object with mass.

Electrons have mass. They're repelled by other electrons
Sure, the gravitational force of attraction can be calculated between them, but it's quite pathetic compared to the other forces. (Just being picky.)

That's because electromagnetic force > gravitational force. The force is weak in gravity.