What cheeses me off

[TomVexille]

I am reliably informed by MrMac - (a golfer for 60 years) that once he starts to play badly it's a sign that he needs another club or a new putter. He's been trying to buy his way out of trouble for many many years

You ALWAYS need a new putter

 

[anat0l]

WCMO is I almost lost my **** at someone today because they said that a leap year is any year that is divisible by 4.

 

[serfty]

WCMO is I almost lost my **** at someone today because they said that a leap year is any year that is divisible by 4.

I guess they won't need to worry for another 75 years.

 

[anat0l]

I guess they won't need to worry for another 75 years.

Yeah, when you're encouraging people to write persistent and futureproof code, that's not acceptable. Excluding the calendar irregularities around and before the adoption of the Gregorian calendar, it's not even difficult to code the algorithm. (Yes I'm aware most languages have a "Date" object that removes that difficulty - that was not the point of the exercise)

I can't remember how old I was when I learned what a leap year was, but it's debatable whether one should lie to young students for the sake of simplicity or actually tell them because it really isn't that difficult as such. As a teacher, even with high school students, sometimes I fight with myself in deciding how much to tell students versus not giving them a "long-winded" lecture (keeping in mind that today's students have Google and ChatGPT, compared to what we had when I went through school).

 

[serfty]

I can't remember how old I was when I learned what a leap year was

I knew about leap years from a young primary school age, even knowing about years divisible by 100. However it wasn't until we approached the new millennium that I found that 2000 was going to be a leap year in line with the divisible by 400 rule.

 

[Quickstatus]

#WCMO
Why didnt my physics teacher in school tell me about Emmy Noether?

I have always wondered why Energy, Momentum, Angular Momentum, Electric Charge is Conserved.
My physics teacher in school could never tell me why and I have always thought that it was an arbitrary construct which all of physics seem to rely on.
I have since discovered that they are not necessarily conserved and its conservation or not is not arbitrary.

Even Einsteins theory of general relativity could not reconcile why energy was not conserved. He came up with a workaround to make energy conserved but was shown to be incorrect by Emmy Noether.

Emmy Noether's theory solves that. "For every continuous symmetry in the universe there exists a conserved quantity".
It explains energy lost by photos travelling in an expanding universe. Photons lose energy as the wavelength gets longer (redshifting) when travelling through an expanding universe. Where does that energy go. It can't dissapear if Energy is conserved but can if energy is not conserved.
An expanding universe is not continuously symmetrical. She is one of the greatest mathematicians ever IMO.


I can now die content with that knowledge

 

[prozac]

#WCMO
Why didnt my physics teacher in school tell me about Emmy Noether?

I have always wondered why Energy, Momentum, Angular Momentum, Electric Charge is Conserved.
My physics teacher in school could never tell me why and I have always thought that it was an arbitrary construct which all of physics seem to rely on.
I have since discovered that they are not necessarily conserved and its conservation or not is not arbitrary.

Emmy Noether's theory solves that. "For every continuous symmetry in the universe there exists a conserved quantity.
It explains energy lost by photos travelling in an expanding universe. Photons lose energy as the wavelength gets longer (redshifting) when travelling through an expanding universe. Where does that energy go. It can't dissapear when Energy is conserved but can if energy is not conserved.
An expanding universe is not continuously symmetrical. She is one of the greatest mathematicians ever IMO.


I can now die content with that knowledge

The energy disappears into the paint on your walls and ceilings. One day someone will work out a way of retireving images and audio from wall paint and history will reveal previously unknown data.

 

[Quickstatus]

One day someone will work out a way of retireving images and audio from wall paint and history will reveal previously unknown data.

The fundamental principle of quantum mechanics is that Information is never lost. While the paint deteriorates through entropy, information becomes scrambled but never lost and there remains a possibility, though remote, that the information can be reconstituted. So actually Humpty Dumpty can be put back together .

If that person can put Humpty Dumpty back together again, they can solve your problem @prozac.