@level98@mastodon.social
@level98@mastodon.social avatar

level98

@level98@mastodon.social

Always learning!... and helping others to do the same. I've done research, written papers, taught maths, physics and science at high school and university... now doing bits and pieces
#Physics #ITeachPhysics #Maths #Math #Mathematics
Theo Hughes | he/him/his | 🇦🇺

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level98, to random
@level98@mastodon.social avatar

I am woke (feeling Spartacus vibes).

level98, to random
@level98@mastodon.social avatar

A classic song about politics, and "swing voters":

🎵"Take a jump to the left... and a step to the riiiight."🎵

level98, to random
@level98@mastodon.social avatar

Hey, let's have politicians also do our policing (US Sheriffs). What could possibly go wrong?

[Is there anywhere else in the world that works like this?]

RickiTarr, to random
@RickiTarr@beige.party avatar

It's Data, not Data.

level98,
@level98@mastodon.social avatar

@RickiTarr A "data" is one who is dating someone. The person they are dating is a "datee".

I hope that's cleared things up.

level98, to random
@level98@mastodon.social avatar

A standard form for the equation of a straight line is:

y = m"Twitter" + c

level98, to PCGaming
@level98@mastodon.social avatar

Wow! Played through the Mass Effect trilogy (Legendary Edition) twice. Never played ME previously. Great story, writing, voice acting etc. Not perfect. Nothing is. But incredibly entertaining. Best $8 I ever spent.

level98, to random
@level98@mastodon.social avatar

Today, Sesame Street is brought to you by the number 34.

level98, to random
@level98@mastodon.social avatar

Social media... where revealing a momentary act of stupidity gets way more traction than my insightful poltical commentary, or posts about maths/science. C'est la vie. 😄

level98, to random
@level98@mastodon.social avatar

I momentarily panicked because my phone was not in my pocket.

Dear reader... it was not in my pocket because it was in my hand.

realTuckFrumper, to random
@realTuckFrumper@mastodon.social avatar

'Falling off the cliff': Dementia expert shows 4 ways Trump exhibits 'shocking decline' https://www.rawstory.com/trumpdemtia/?utm_source=dlvr.it&utm_medium=mastodon

level98,
@level98@mastodon.social avatar

@realTuckFrumper My issue with this, is a "decline" from what?... he has always been (as far as I have been aware) a narcissistic babbling hatemonger. Why has anyone ever thought he should be leading anything?... even as "entertainment" (e.g. The Apprentice) I have never understood the appeal... it was only ever entertaining in the same way as people rubbernecking at a car crash (i.e. NOT entertaining).

So, does this make any difference to those that have previously "followed" him?

level98, to physics
@level98@mastodon.social avatar

Student: "What is the unit of power?"

Me: "Is that a question or a statement?"

[James Watt providing amusement to physics teachers and students for over a century.

In 2036 it will be 300 years since his birth - though the unit was only adopted around 1882.]

GrimmReality, to random
@GrimmReality@beige.party avatar

Not sure which one of you nerds fields these complaints but "indefatigable" should mean the exact opposite of what it means.

level98, (edited )
@level98@mastodon.social avatar

@GrimmReality The "Fatigable" was a suburb of Paris where lots of people used to gather to party all day and night - they seemed incapable of tiring of their partying.

So, if a French person was tireless in something they did, English people would would ask them: "Are you in the Fatigable?"... which morphed into: "Are you in de Fatigable?". Which led to the current word we use.

Or something like that.

level98, to random
@level98@mastodon.social avatar

Appointments for life... what could possibly go wrong with that (US Supreme Court)?

level98, to random
@level98@mastodon.social avatar

Politics is inherently confusing.

It's sad that while I'm happy Australian Labor are the majority government (rather than Liberals - essentially the Australian Tories/Republicans)... I'm still depressed at the lack of Labor taking "significant action" on big issues such as climate change, and systemic issues around housing, the generational wealth gap etc.

With our preferences voting system I can only hope there'll be yet more independents similar to David Pocock voted in at the next election.

drunkenmadman, to random
@drunkenmadman@aus.social avatar

Well, that’s me thoroughly pissed off for the day. Anyone want to join me in starting a grassroots-funded think tank called “The Fuck What Those Guys Reckon, People Are More Important Than Money Institute”?

https://youtu.be/22DkShsfumU?si=f6e5P9FzdhS1O90F

level98,
@level98@mastodon.social avatar

@drunkenmadman Sure... though we might have to work on a snappier acronym than TFWTGRPAMITMI.

Qldaah, to random
@Qldaah@aus.social avatar

WA Liberals will go to the next election supporting extending coal & gas power. They'd consider a nuclear energy business case from Peter Dutton for the future. https://www.thenewdaily.com.au/news/2024/05/26/wa-liberals-reject-dutton-nuclear-plan

level98,
@level98@mastodon.social avatar

@Qldaah The headline could be: "WA Liberals double down on the destruction of humanity."

But there are so many things wrong with the thinking of all those involved that it must be difficult to pick a title.

feather1952, to auspol
@feather1952@aus.social avatar

Extreme inequality has gotten worse!

‘Everybody has not won’: trickle-down economics was an idiotic idea. How do we fix the inequality it causes?

https://theconversation.com/everybody-has-not-won-trickle-down-economics-was-an-idiotic-idea-how-do-we-fix-the-inequality-it-causes-223296

level98,
@level98@mastodon.social avatar

@feather1952 I mean, other than the article is generally stating the "obvious", I am glad that people who are able to articulate it / propagate this message more widely than I, write about these things.

Another suggestion for "how to fix it" is to "ban" writing about GDP in talking about whether things are going well (obviously we can't ban it, but hopefully it's understood I mean it'd help to shift the "economic" conversation to talking about things that "matter" to people in general/society).

The_Icarian, to random
@The_Icarian@federated.press avatar
level98,
@level98@mastodon.social avatar

@cherold @The_Icarian Given the US President is 81, there could still be plenty of people who were involved in events like this who could be exerting influence in this regard.

RustyBertrand, to random
@RustyBertrand@vivaldi.net avatar

1/5

Did fellow philosopher Ludwig Wittgenstein dispose of Bertrand Russell's paradox? ”... and that disposes of Russell's paradox.” In mathematical logic, Russell's paradox attempts to illustrate that every set theory that contains an unrestricted comprehension principle leads to contradictions. In 1923, Ludwig Wittgenstein proposed to ”dispose” of Russell's paradox as follows:

”The reason why a function cannot be its own argument is that the sign for a function already contains the prototype of its argument, and it cannot contain itself. For let us suppose that the function F(fx) could be its own argument: in that case there would be a proposition 'F(F(fx))', in which the outer function F and the inner function F must have different meanings, since the inner one has the form O(f(x)) and the outer one has the form Y(O(fx)). Only the letter 'F' is common to the two functions, but the letter by itself signifies nothing. This immediately becomes clear if instead of 'F(Fu)' we write '(do) : F(Ou) . Ou = Fu'.

... and that disposes of Russell's paradox.”

— Ludwig Wittgenstein, Tractatus Logico-Philosophicus, 3.333

level98,
@level98@mastodon.social avatar

@TimWardCam @RustyBertrand The only reason you'll usually see them in "natural language" is that formal statements are translated into it by mathematicians trying to convey them to the "general public".

These "paradoxes" stem from various programs attempting to formalise all of mathematics e.g. Whitehead and Russell's "Principia Mathematica" https://en.wikipedia.org/wiki/Principia_Mathematica. And stuff like Godel's original papers.

They definitely don't "disappear" (become easy to explain) when formalised.

moelassus, to privacy
@moelassus@mastodon.social avatar

for the rich.

https://gizmodo.com/congress-just-made-it-way-harder-to-track-taylor-swift-1851492383

level98,
@level98@mastodon.social avatar

@moelassus I share my google location with the wife and kids and none of them bother using it. Someone in Australia should make a law that they HAVE to care!!

To be fair, the middle child does... but that's middle children for you! (jk).

sjb, to physics
@sjb@mstdn.io avatar

Today's thing I can't integrate:
sin^3(x)/(1+a-a cos(x))^2 dx from 0 to pi

level98,
@level98@mastodon.social avatar

@sjb I'm probably missing something (and or this might be a running joke post, or something)... but just use the substitution u = 1+a-a cos(x)?

level98,
@level98@mastodon.social avatar

@sjb I thinnk one of the factors of sin disappears with the "du"... and use sin^2(x) = 1-cos^2(x) for the other two factors. I think that then gives you an integrable expression. Of course, I could actually try it... but where's the fun in that! 🙂

level98,
@level98@mastodon.social avatar

@sjb I'm going to get my students to try it in the Year 12 maths class I teach in about 10 minutes... they need some practice for an upcoming assessment. 🙂

level98,
@level98@mastodon.social avatar

@sjb They did it... but it's not "pretty". In terms of "u" (with my help/hints) they got the answer:

1/a^3 [2(1+a)lnu + (2a+1)/u - u]

And the TI nspire CAS calculator was able to do it and give an ugly answer in terms of x... but I couldn't convince the students to sub the expression for x into u. and check the CAS answer 🙂

level98,
@level98@mastodon.social avatar

@sjb Ah... Klein-Nishina, the QFT formula related to Compton scattering - I was getting a Compton scattering prac up and running in a 3rd Year Uni teaching lab and found a mistake in relation to calculations using Klein-Nishina for this prac in the classic Melissinos "Experiments in Modern Physics" (if I remember correctly the end result is OK... possibly two mistakes cancelling out... but it was a while back). I emailed the publisher but got no response - oh well.

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