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Re: Physics Homework Assignment, I Once Had...

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On 6/15/2017 6:14 PM, Mahipal wrote:
> On Thursday, June 15, 2017 at 1:52:25 PM UTC-4, Sегgi о wrote:
>> On 6/15/2017 9:41 AM, Mahipal wrote:
>>> On Thursday, June 15, 2017 at 9:57:24 AM UTC-4, Sегgi о wrote:
>>>> On 6/15/2017 8:38 AM, Mahipal wrote:
>>>>> Calculate the probability of any two four-dimensional objects colliding.
>>>>> You all do know what a collision is? Good for you! Now... go calculate.
>>>>> Assignment due by Friday, no class lasts forever. Chop chop! Run like the wind!
>>>>> Besides, if you submit by Friday, I'll have something to do over the Weekend.
>>>>> God knows the wife is a waste of time... but I digress... Vera? VERA?! Et tu?
>>>>>
>>>>> I once had a life, or should I sing, life once had me... The BeatlesIsmIshQ.
>>>>>
>>>>> -- Mahipal == माहिपाल "My Pal" or "Maple" Loops, S(y)rup, Wood. IPMM ७६३८!
>>>>
>>>>               EZ-Cheeesey

>>> Actually not. While the answer is obvious, the proof of it is quite complicated.
>>>
>>>> two objects;
>>>>
>>>> zero dimentions => already collided
>>>
>>> Yes, I have to agree with that. But SergioJi, the word is dimensions.
>>>
>>>> one dimention => two points on a line, are they within collision range
>>>> 	need to know size of "objects", call it J
>>>> 	need to know length of line, call it K
>>>> 		then P is simply (J/K) => we covered the entire line by the number of
>>>> first objects, then because adding second object will overlap the first
>>>> object on the line.

>>> Be careful, and do lookup dimentia/Dementia. Again, sorry, not an English Class here.
>>
>>      .....  one dimentia, two dimentia, (yep, hillary and trump)
> 
> Hillary and Comey are now both famous private citizens. TrumpET blows his own horn.
> 
>>>> two dimentions => devide space by area of object call it L
>>>> 	need to know area of object call it L
>>>> 	need to know the total area of the 2-D space, call it M
>>>> 	P = L/M	
>>>>
>>>> etc.

>>> That might work. The actual proof is really difficult and very neat.
>>> Where are me m(y) 1990s class notes of Mathematical Physics?!
>>> Hey... it's not like I walk around, singing, such questions by meself.
>>
>> I still have the textbooks I took the classes with on the bookshelf,
>> from the 19x0's. (cant sell them now, too cheap) They called us lizards
>> back then, because...   [engineers, collage, apperance, before____]
> 
> Actually, me too! I still have all my college textbooks. If any of me
> m(y) great teachers/professors are still alive today, they'd be proud!
> I think they'd be proud. Them Gurus never ever call me. Ever?! W T F...
> 
>>> There are faces I remember... all my life... though some have changed...


4 dimentions,
>>>> 	 need to know 4th dim space occupied by object, call it Q
>>>> 	need to know total space of 4th dimentional used, callit R
>>>> 	P=R/Q
>>>
>>> That's a recurring strategy SergioJi, what's the answer/solution?
>>
>> I cannot visualize it.
>> I Could in 3D, all simple ratios.
>> If I assumed out of the blue "sizes" of things, but I admit, I dont know
>> what 'size' means in 4D, 10 quartic meters ?
> 
> I'm not set on the idea that it is a visualization problem, alone.
> No CGI need apply. We're thinking here... Walk me m(y) way...
> 
>>>> [no disperriaging remarks were used, only misted speltings]

>>> Think of it this way: Two four-dimensional objects walk into a bar...
>>
>> I know that feeling, I was in a bar, doing Ouzo shots, and got 4th
>> dimentional alright, not sure how I got outta there, some kind of
>> "multidimentional transference one cannot remember", betcha.
> 
> I love Ouzo (Anise in Greek, Sonf in Hindi) shots, though I mostly drink Vodka.
> 
>>> Some questions are best left open Open OPEN... this one Q has an exact answer.
> 
> -- Mahipal == माहिपाल "My Pal" or "Maple" Loops, S(y)rup, Wood. IPMM ७६३८!
> Enjo(y)... Salute… Cheers... Open your M I N D… Time it is Is IS 3PM somePlace.
> 

[Vodka and me parted ways long ago, no gin either, no mint schnapps either]

Found this paper;

"A Method for Calculating Probability of Collision between Space Objects"

http://www.raa-journal.org/raa/index.php/raa/article/viewFile/1587/1442

what is interesting is that they have a compact equation, for 3D, which 
can be easily extended into 4 dimentions.

But they are able to generate equations using the constraints of stuff 
orbiting earth, space junk. BUT even that can be backed out, perhaps 
backing out leaves one with nada, the general case.  And Im sure they 
have  sizes of the objects in there somewhere.

basically P = Pr * Pt   [delta distance, and arrival time]


from the paper:
4 CONCLUSIONS
The existing general method for calculating the probability of collision 
provides sufficiently accurate results, but is not based on a direct 
connection between the probability of collision, the geometry of the 
encounter and the related error covariance.

Based on the geometry of the encounter, a method is developed to compute 
probability of collision. This method gives an explicit expression to 
compute probability of collision which is expressed as a function of the 
radial and the cross section components of the relative position and 
error covariance.

The expression is compact and advantageous for directly analyzing the 
factors that influence the probability of collision. A computer program 
is developed to implement the technique, and the results of calculations 
are compared with the general method, which show that this method is 
applicable to most situations where assessing the risk of collision in a 
near-circular orbit is required. Additionally, the method separates 
orbit motions in the radial direction from those in the cross section. 
Therefore, position errors and geometric sizes of the two components can 
be handled differently to improve precision, especially for irregularly 
shaped spacecrafts, such as shuttles with wings. Continuation of this 
work is currently in progress.

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Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-15 06:38 -0700
  Re: Physics Homework Assignment, I Once Had... Sегgi о <iinvalid@invalid.com> - 2017-06-15 08:57 -0500
    Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-15 07:41 -0700
      Re: Physics Homework Assignment, I Once Had... Sегgi о <iinvalid@invalid.com> - 2017-06-15 12:52 -0500
        Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-15 16:14 -0700
          Re: Physics Homework Assignment, I Once Had... Sегgi о <iinvalid@invalid.com> - 2017-06-16 13:16 -0500
            Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-20 08:51 -0700
              Re: Physics Homework Assignment, I Once Had... Sегgi о <iinvalid@invalid.com> - 2017-06-22 21:54 -0500
                Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-24 15:28 -0700
  Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-15 16:53 -0700
    Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-15 17:31 -0700
      Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-15 22:54 -0700
        Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-16 10:23 -0700
          Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-16 13:32 -0700
            Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-16 14:47 -0700
              Re: Physics Homework Assignment, I Once Had... benj <benj@nobody.net> - 2017-06-16 20:32 -0400
                Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-17 08:22 -0700
              Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-17 10:44 -0700
                Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-18 11:52 -0700
                Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-18 13:58 -0700
                Re: Physics Homework Assignment, I Once Had... "Chris M. Thomasson" <invalid@invalid.invalid> - 2017-06-18 14:09 -0700
                Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-18 15:22 -0700
                Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-18 16:31 -0700
                Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-19 05:26 -0700
  Re: Physics Homework Assignment, I Once Had... "nuny@bid.nes" <alien8752@gmail.com> - 2017-06-16 00:59 -0700
    Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-16 10:46 -0700
      Re: Physics Homework Assignment, I Once Had... "nuny@bid.nes" <alien8752@gmail.com> - 2017-06-19 14:51 -0700
        Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-20 17:45 -0700
  Re: Physics Homework Assignment, I Once Had... Sylvia Else <sylvia@not.at.this.address> - 2017-06-22 18:40 +1000
    Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-22 09:31 -0700
      Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-23 06:38 -0700
        Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-23 10:25 -0700
          Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-23 16:38 -0700
            Re: Physics Homework Assignment, I Once Had... The Starmaker <starmaker@ix.netcom.com> - 2017-06-24 11:23 -0700
              Re: Physics Homework Assignment, I Once Had... Mahipal <mahipal7638@gmail.com> - 2017-06-24 12:57 -0700

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