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Re: [Phys-L] TWO QUESTIONS



Thank you questioning, Bob.

1) My gedanken model is a simple example of gravitational waves, traveling from one place (from the massive oscillating disk) to another (to the small disk, used as a detector). The oscillation amplitude of the small disk may be large or small; it is expected to be inversely proportional to the mass of that disk.

2) Unfortunately, I cannot answer your second question; I do not know what you mean by "mimics waves." Please elaborate.

Ludwik
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On Apr 4, 2016, at 6:18 PM, LaMontagne, Bob wrote:

Not sure what it illustrates. The small disk will undergo relatively large oscillations and will experience a varying gravitational field from the larger one (mostly stationary). So what about this mimics waves generated by the larger practically motionless mass?

Bob at PC
________________________________________
From: Phys-l <phys-l-bounces@www.phys-l.org> on behalf of Ludwik Kowalski <kowalskil@mail.montclair.edu>
Sent: Monday, April 4, 2016 6:03 PM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] TWO QUESTIONS

My modified model, (described yesterday) no longer refers to a collision of two stars. It is it refers to two piston-like disks (M>>>m) in the vacuum. Is this model acceptable? If not then what is wrong?

Ludwik
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On Apr 4, 2016, at 4:32 PM, LaMontagne, Bob wrote:

I am envisioning two massive black holes or stars approaching each other in a straight line. They collide and catastrophically merge into a single object. I then think of a planet/spacecraft a long distance away on the perpendicular bisector of the line of approach of the two massive objects. I see a case for GR gravitational waves, but not Ludwik's classical waves (at least not with the clear cut classical explanation he is looking for.)

Bob at PC



________________________________________
From: Phys-l <phys-l-bounces@www.phys-l.org> on behalf of Moses Fayngold <moshfarlan@yahoo.com>
Sent: Monday, April 4, 2016 8:35 AM
To: Phys-L@Phys-L.org
Subject: Re: [Phys-L] TWO QUESTIONS

On Friday, April 1, 2016 3:33 PM, Carl Mungan <mungan@usna.edu> wrote:



Suppose our Sun is hit by a star of equal mass, traveling in the opposite direction.

Relative to what: the center of the Milky Way? In other words, what initial speed of the Sun are you supposing?

Actually, the initial question is a little bit ambiguous, since it does not specify the initial speeds of the Sun and the oncoming star. Hence Carl Mungan's question is quite appropriate. But even if both initial velocities are given (say, relative to the center of our galaxy), I think, the most convenient way for solution would be to switch to the reference frame in which the net momentum of the system (Sun+oncoming star) is zero (unless this had also been assumed from the very beginning).
Moses FayngoldNJIT
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Forum for Physics Educators
Phys-l@www.phys-l.org
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_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l
_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l

_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l
_______________________________________________
Forum for Physics Educators
Phys-l@www.phys-l.org
http://www.phys-l.org/mailman/listinfo/phys-l