Today I Learned

  • Thread starter Thread starter Greg Bernhardt
  • Start date Start date
Click For Summary
Today I learned that cleaning a white hat can be done with bleach cleaner, but it’s important to rinse it before wearing it again. I also discovered that "oyster veneering," a woodworking technique from the late 1600s, is experiencing a minor revival despite its labor-intensive nature. Additionally, I learned that the factorial of 23 (23!) equals 25,852,016,738,884,976,640,000, which interestingly has 23 digits, a unique coincidence among factorials. I found out that medical specialists often spend less than 10 minutes with patients, and that watching TV can contribute to weight gain. Other insights included the fact that a kiss can transfer around 80 million microbes, and that bureaucracy can sometimes hinder employment opportunities. The discussion also touched on various trivia, such as the emotional sensitivity of barn owls and the complexities of gravitational lensing around black holes.
  • #2,821
Can I change my moniker to "Spherical Couch Potato" ?
 
Physics news on Phys.org
  • #2,822
hmmm27 said:
Can I change my moniker to "SphericalCouchPotato" ?
I don't think you can, Greg has the algorithm.
 
  • #2,823
It was mostly rhetorical, while I tried to figure out what an earlier poster meant by "molecules" "black holes" etc.(figured out).
 
  • #2,824
Now I have a different understanding of the pot at the end of the rainbow!

244743


The cars need Dead stickers.
 
Reply
  • Like
  • Haha
Likes strangerep, jim hardy, hmmm27 and 3 others
  • #2,825
Stavros Kiri said:
Is it a mass thing or more like a "structure thing"? ...
based mainly on number of posts? ...
@Greg Bernhardt
 
  • #2,826
It is based on trophy points, the increasing levels are in increasing mass and size (until it goes into the speculative region). There is no black hole.
You can see the level in user profiles.
 
Reply
  • Like
Likes pinball1970 and Stavros Kiri
  • #2,827
Stavros Kiri said:
Is it a mass thing or more like a "structure thing"? ...
More structure means more mass though? Also
mfb said:
It is based on trophy points, the increasing levels are in increasing mass and size (until it goes into the speculative region). There is no black hole.
You can see the level in user profiles.
Singularity is the highest I have found so far with a quick search and these tie in with pts (Fresh42)below this multiverse (orodruin, Greg) then universe ( you, Peter Donis) galaxy (mark 44) Star (Dale Russ) then it could be moon (Neumaier, Nugatory,jim) but I suppose planet/gas giant may be in there.

Up from the other end quark, atom, molecule some stuff then mountain ocean.
 
  • #2,828
There is supercluster above galaxy and planet between moon and star. Found with a bit of searching, Greg didn’t release a full list. That also means we don’t know if there is something beyond singularity, no one has 1300+ yet.
 
Reply
  • Like
Likes Stavros Kiri
  • #2,829
And 'Armchair Scientist' ! ...
 
Reply
  • Like
Likes pinball1970
  • #2,830
.
Mark Twain said:
Forgiveness is the fragrance that the violet sheds on the heel that has crushed it.
It's a beautiful quote!
.
 
Reply
  • Like
Likes gleem and Stavros Kiri
  • #2,831
OCR said:
.
It's a beautiful quote!
.
That is also true Love! ...
 
  • #2,832
mfb said:
the increasing levels are in increasing mass and size (until it goes into the speculative region).
pinball1970 said:
More structure means more mass though?
I think size, structure and mass come in all together, but with no hard and fast rule ...
[e.g. there can be a planet smaller than a moon, in general ...]
 
  • #2,834
Stavros Kiri said:
I think size, structure and mass come in all together, but with no hard and fast rule ...
[e.g. there can be a planet smaller than a moon, in general ...]
I will go with that.
A helium balloon has size and not too much mass or structure whereas a plasmid has lots of structure but not so much size or mass and a rock has more mass than both with little structure but much bigger size than the plasmid but much smaller than a He Balloon (it's a big balloon)

Density would be better I suppose but that would be volume and mass rather than 'size' which is a little ambiguous.
So I am probably denser than a galaxy in that case? Definitely supercluster or universe.
Stick with mass otherwise it gets messy.
 
  • #2,835
pinball1970 said:
I will go with that.
A helium balloon has size and not too much mass or structure whereas a plasmid has lots of structure but not so much size or mass and a rock has more mass than both with little structure but much bigger size than the plasmid but much smaller than a He Balloon (it's a big balloon)

Density would be better I suppose but that would be volume and mass rather than 'size' which is a little ambiguous.
So I am probably denser than a galaxy in that case? Definitely supercluster or universe.
Stick with mass otherwise it gets messy.
I mostly agree.
I would rather though stick with the old way ... (for PF members), ... [aside of course, perhaps, possible security and privacy issues ...]
 
  • #2,836
TIL that Switzerland has a real good law: What once is forest, has to stay forest!
 
  • #2,837
In Oregon, its more like:
what was once forest, if now it is made not forest,
replant it to make it forest again (for a while).

Not so good for the larger/older trees.
 
  • #2,838
BillTre said:
In Oregon, its more like:
what was once forest, if now it is made not forest,
replant it to make it forest again (for a while).

Not so good for the larger/older trees.
The swiss don't do it for nature alone. The fact is, they master elementary arithmetic!

They save more than 4 billion CHF per year: less avalanches, mud slides, floods, etc.
 
  • #2,839
fresh_42 said:
They save more than 4 billion CHF per year: less avalanches, mud slides, floods, etc.
Trees prevent Congestive Heart Failure ?
 
Reply
  • Haha
  • Like
Likes BillTre, DaveE and Ibix
  • #2,840
fresh_42 said:
TIL that Switzerland has a real good law: What once is forest, has to stay forest!
The problem with that is in some places trees grow really fast, and places that weren't forest, become forest and can't be cut back.. I know this from the Ticin, where there are a lot of little cottages on acreages that got abandoned
 
  • #2,841
In an effort to "Go Green" South Korea cut down 4400 hectare of forest (2 million trees) to make way for solar farms
 
  • #2,842
Today I learned that South Korea probably looks pretty green.

2019.07.28.S.Korea.solar.vs.forest.png

South Korea land use[ref: wiki, of course]
Arable land: 15.3%​
Permanent crops: 2.2%​
Permanent pasture: 0.6%​
Forest: 63.9%​
Other: 18.0%​
 
Reply
  • Like
  • Informative
Likes Klystron and Drakkith
  • #2,843
TIL to experience several levels and flavors of sadness; some quite sweet.
 
  • #2,844
Klystron said:
TIL to experience several levels and flavors of sadness; some quite sweet.

I don't like sadness. :frown:
 
Reply
  • Like
Likes Craftek_Ana
  • #2,845
Klystron said:
TIL to experience several levels and flavors of sadness; some quite sweet.
Drakkith said:
I don't like sadness. :frown:
Correction: Bitter sweet. 🤐 Dark chocolate bitter. Yet sweet, like birdsong. 🐥
 
  • #2,846
Klystron said:
Correction: Bitter sweet. 🤐 Dark chocolate bitter. Yet sweet, like birdsong. 🐥
Dark chocolate is healthier than the milky types, e.g. it is has a mild anti depression effect. Even when it comes to sweets like chocolate, what tastes better is worse. I would be first at the vegetable shelves if they only tasted like steaks :biggrin:
 
  • #2,847
Rx7man said:
The problem with that is in some places trees grow really fast, and places that weren't forest, become forest and can't be cut back.. I know this from the Ticin, where there are a lot of little cottages on acreages that got abandoned
Switzerland has a high population density, especially if we subtract the places so high that they don't support either population or forest. It's not like there would be large areas no one cares about.
 
  • #2,848
Appaget said:
Today I taught differentials and integrals
Good for you. What did you LEARN today?

Or do you mean you taught them to yourself?
 
Last edited:
  • #2,849
phinds said:
Good for you. What did you LEARN today?
The best way to learn something is to teach it. But I learned that a long time ago. While teaching.
 
Reply
  • Like
Likes epenguin, Craftek_Ana, DaveE and 6 others
  • #2,850
jbriggs444 said:
The best way to learn something is to teach it. But I learned that a long time ago. While teaching.
Yep. It is a mean trick. One has to convince oneself first!
I wished some politicians would try this.
 
Reply
  • Like
Likes pinball1970

Similar threads

Things that you regret not continuing to practice?
  • · Replies 14 ·
Replies
14
Views
2K
What Did You Learn Today? A Tradition of Daily Learning and Sharing
  • · Replies 26 ·
Replies
26
Views
6K
Home Repair & Maintenance Advice for Newbie?
  • · Replies 11 ·
Replies
11
Views
4K
Understanding the divide white/black/blue
  • · Replies 161 ·
6
Replies
161
Views
14K
Studying I feel I have lost it. How do I be dissolved in studies again?
  • · Replies 4 ·
Replies
4
Views
2K
Fighting for Financial Relief: Surviving COVID Debt
  • · Replies 9 ·
Replies
9
Views
2K
Optimizing Prisoner Strategy for the Hat Riddle: A Simple Solution
  • · Replies 35 ·
2
Replies
35
Views
7K
MHB Effective learning techniques for abstract mathematics?
  • · Replies 3 ·
Replies
3
Views
3K
My experience as a hostage
  • · Replies 2 ·
Replies
2
Views
342
Learn to Play Piano - Tips for Beginners
  • · Replies 27 ·
Replies
27
Views
6K