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by trackstar
January 13th, 2022, 12:50 am
Forum: Off Topic
Topic: News from Outer Space
Replies: 1219
Views: 160661

Re: News from Outer Space

Would you believe? Just as we are talking Super Bowl playoffs... News about WASP-103b - a very special planet - CNN Jan 12 "...astronomers have found a giant exoplanet that looks more like a football or rugby ball than a sphere.  ...WASP-103b is located about 1,225 light-years from Earth in the...
by trackstar
January 11th, 2022, 4:40 am
Forum: Off Topic
Topic: Are You Ready for Some Football? (North American Style)
Replies: 434
Views: 71196

Re: Are You Ready for Some Football? (North American Style)

A little food for thought: The Physics of Football - How Stuff Works.
brownsbengals.jpg
Browns vs. Bengals from this weekend.
by trackstar
January 11th, 2022, 4:28 am
Forum: Off Topic
Topic: Newton's shell theorem with random density
Replies: 22
Views: 789

Re: Newton's shell theorem with random density

That is funny. I have thought that it would be interesting to have a game where some of the rules changed after each quarter. Either randomly, or as kind of a handicapping system to give a badly trailing team a chance. So many things you could alter - the number of downs, how many men allowed on the...
by trackstar
January 9th, 2022, 7:51 pm
Forum: Off Topic
Topic: Newton's shell theorem with random density
Replies: 22
Views: 789

Re: Newton's shell theorem with random density

Found a short paper on this - fun approach and there a nice summary below: " This paper is a gem, exhibiting the beauty of mathematical proof while at the same time revealing the mystery behind some deep classical results."  Newton’s Shell Theorem via Archimedes’s Hat Box and Single-Variab...
by trackstar
January 7th, 2022, 12:46 am
Forum: Off Topic
Topic: Newton's shell theorem with random density
Replies: 22
Views: 789

Re: Newton's shell theorem with random density

Replacing previous diagram with one that will stay put:
NSTdiagram.png
NSTdiagram.png (3.68 KiB) Viewed 304 times
by trackstar
January 6th, 2022, 8:49 pm
Forum: Off Topic
Topic: Newton's shell theorem with random density
Replies: 22
Views: 789

Re: Newton's shell theorem with random density

https://upload.wikimedia.org/wikipedia/commons/thumb/3/3d/Shell-diag-1.svg/500px-Shell-diag-1.svg.png " A solid,  spherically   symmetric  body can be modeled as an infinite number of  concentric , infinitesimally thin spherical shells. If one of these shells can be treated as a point mass, th...
by trackstar
January 6th, 2022, 8:28 pm
Forum: Off Topic
Topic: Newton's shell theorem with random density
Replies: 22
Views: 789

Re: Newton's shell theorem with random density

All too vague for me. How does it all relate to a "shell"? Somebody please use the LaTex or post a clarifying picture.
Newton's Shell Theorem via math.ksu.edu in pdf form

Equations and pictures there, Your Majesty. : D
by trackstar
January 4th, 2022, 10:21 pm
Forum: Off Topic
Topic: Chatroom
Replies: 515
Views: 31919

Re: Chatroom

hello friends, and once again happy new year. what is (the name of) a simple yet efficient algorithm/method to enumerate all the combinations of k elements in a set of with a total of n elements? in my use case this will be all combinations of 2 elements among  ~1K elements. . apologies if this is ...
by trackstar
January 4th, 2022, 3:52 am
Forum: Politics Forum
Topic: Best news of 2022
Replies: 8
Views: 439

Re: Best news of 2022

Well, sure and subject to change, but I am happy for Apple. From the article:  " Apple’s closest rivals are Microsoft , valued at $2.53 trillion at the end of 2021, Google parent company Alphabet , valued at $1.92 trillion, and Amazon , valued at $1.69 trillion." So, the Evil Empire did no...
by trackstar
January 4th, 2022, 2:19 am
Forum: Politics Forum
Topic: Best news of 2022
Replies: 8
Views: 439

Re: Best news of 2022

Golden Apple

Apple Becomes 1st Company Worth $3 Trillion - Forbes January 3 2022

That is more than the GDP of the UK!
apple.jpg
by trackstar
January 2nd, 2022, 2:31 pm
Forum: Off Topic
Topic: Looking Ahead: 2022
Replies: 1
Views: 439

Re: Looking Ahead: 2022

Oh, Places to Go and Things to Know Congratulations, Wilmotters! Today is your day. Escape to Great Places! Head off and away! You have Pfizer in pocket. Moderna in shoes. You can vax yourself  Whenever and wherever you choose. And if you’re not sure, just for good measure You can take J&J now,...
by trackstar
December 31st, 2021, 2:25 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 5013

Re: Advent Calendar 2021 (for the OT)

Quadrantids for Quants The Quantrid meteor shower is set to peak on January 2-3 and visible from the Northern hemisphere - a nice way to start the year. 2022 Quadrantid meteor shower to peak January 2-3 - EarthSky December 29  for time and viewing information. bearish: a) It's a perfect split. b) N...
by trackstar
December 31st, 2021, 1:38 am
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 5013

Re: Advent Calendar 2021 (for the OT)

New Year's Resolutions

Always books.  Something for everyone in this big pile. : D

and when not reading - wandering in the forest.

Happy New Year, everyone.
by trackstar
December 22nd, 2021, 2:33 pm
Forum: Off Topic
Topic: Advent Calendar 2021 (for the OT)
Replies: 102
Views: 5013

Re: Advent Calendar 2021 (for the OT)

Great! It was fun constructing these puzzles and quizzes. Before I go, here's something in advance for New Year's Eve (no right or wrong answers here, at least not that can be proven yet). December 31, 2021 The Big Picture 1. How old is the Universe? a) It has always been here - there was no beginni...
by trackstar
December 22nd, 2021, 2:44 am
Forum: Off Topic
Topic: Gallows humour
Replies: 144
Views: 17765

Re: Gallows humour

I was almost done here and about to go on an extended vacation ; ) but... if I really wanted to get into the dark humor, I'd recreate these projections adding in adjustments for certain levels of population loss by 2030 due to Covid v. X.0 Say 1/4, 1/3, 1/2 of the total world population. Then write ...