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The biggest dilemma for creationists demanding equal time in the science curriculum is when non Christian creationists take the same liberty and push Christian creationism into equal time with basically thousands of other creation stories from thousands of other cultures..

Dark pop style, girl actually drowned IRL hunting with her grandfather, boat capsized. Contemporary but reminiscent of older era if pop.

I reread the report, it is a bit misleading. It took spacing between peaks and plotted them in bins 9eV wide and showed the frequency of how many peaks were in the 9 EV bins. ie; 0-9 2 9-18 8 18-27 7 27-36 5 36-45 3 The Zeta function is shoe horned into the text via results from a paper by...

I can see the appeal, makes for great chatter at a cocktail party...how much productive physics is involved I don't know. Makes me question what all the hoopla is about re global patterns in complex systems yadyada. Thanks for link, be an interesting read I am hoping.

Yeah I was dubious on those grounds. The paper/report seem to be a primer to justify further research...reeks a bit of numerology under the pretence of physics. Pretty neat just the same it matches with Zeta zeroes. whole thing sounds cool and spooky, prolly why I hung onto it from years ago...

I read some old unpublished student notes where the student in an undergrad project was looking at general patterns in QM results. Seemed arbitrary to claim anything but the student did show that spacings in EV between transitions in U238 followed the same general form of zero spacings in the...

in general the Frank-Hertz experiment showed the discrete nature of atomic transitions. the target atoms were invisible to electrons except for the energies shown below ie for cases like; " what happens if a photon has energy E > E2-E1 ? Does it interact to the electron anD take it to E2 and...

I don't think there is an official glossary stating when you call it QM or QFT or anything else. there is just a bunch of problems to solve, physical laws and invented mathematical tools to solve them - call them what you prefer. if you get to the task of solving a specific problem and you...

Don't disagree but please consider that IMO a lot of newbs find there way to this forum precisely because of the pop sci interpretation stuff. an opportunity to engage them and steer them to thinking clearer and to appreciate what physics really is?

Very brief and no math, the author is more about the veracity of checking original sources over retelling pop sci stories. All has been said here previously but scattered over many threads and easy to miss for newbs. Might be helpful to beginners who's only exposure is sensational pop sci...

Why are we discussing this due to the fact the box has infinite walls, nobody can ever measure anything in it because there is no way in ...or out. This box is more black than a black box. I always assumed it was a pretend problem for displaying some simple conclusions to beginners.

Thanks link, better spectra than what I could get. Anyone know what software, I'm wanting it. Neat frequency filter option.

Might be more banter than discussion but this I thought interesting. Going to capture the spectra and post it. Didn't think was legit, but legit. Posted as a physics student motivator for teachers introducing overtones, harmonics etc. Why we hear no beat frequency??

Do you have any equations and or data to support these claims?

What units is luminosity measured in? Graph shows fb, physical splanation please. Fill number?

Binding energy to break the nucleus apart in collision.

Huh? To have the proton smash surely you need to overcome both coulomb & binding energy at least? They are not zero.

What does a simple conservation of energy equation look like at LHC at point of collision. Proton energy = ionisation energy + rest mass + brehmstalung losses + relativistic energy + coulomb energy + nuclear binding energy + ...?

Construction, design, beam steering, beam intensity and collision geometry...etc would be optimal with a LINAC in a world of no constraints? Rings are the compromise solution to real world constraints? Is there any possibility of building a research facility that would then become a...

Thanks explanations and links, most interesting. If money wasn't a factor what would be the most optimal config to get the beam up to energy, how is this determined. I guess I could ask the same about rocket stages - is it the same physics principles based in thermodynamics? How does the 20%...

How did they determine the specific number of stages of rings to build (three I think) and the specific diameter plus length of linac eg why not more smaller rings or fewer big ones. I know its optimal but is there a simple way to explain the physics or just simulation came up with this...

Cool, thanks.

I bought a 3DP,very cheap one. I want to create objects in 3D from mathematical equations not solid geometry design tools, prefer to use Mathematica. I would like to print a cycloid section. Any tips hot to make this printable.

Lol got this from a news article, reporter is evidently scientifically literate. "North Korean state media has claimed that the reclusive nation successfully tested a “newly developed ballistic rocket" capable of carrying a nuclear warhead. " encompasses all the definitions discussed, no...

Iove to see the math on hitting a target with a ballistic missile given Earth rotation etc. Sounds like a big problem, guidance seems a bit of cheating on the descent phase to correct the miscalculations.

OK, these definitions seem a bit rubbery but appreciate you taking the time. Is it linguistically redundant to say " guided missile", by definition a missile is guided. Should just be called missile or alternatively - guided munition equipped rocket.

Thanks I think I get it now.

Sorry I don't get guided, rockets are maneuverable hence guided?? how can something guided be called ballistic ie if its guided it is not ballistic by definition? What am I missing? Also missiles use jet engines?

So loosely speaking if it has blowy up bit stuck on the nose its a missile . Self propelled means on board thrust, in contrast to say a ballistic arrow. is a bullet self propelled because it originated from the propellent cartridge it was part of hence a bullet in your definition is a missile...

Why are such weapons ballistic and not just like a powered always controllable flight vehicle eg a jet plane. Is a missile just another name for a rocket?

I have started tutoring a high school student on a gifted & talented program. I am going to get him to investigate the design and performance of a yagi antenna. Plenty of things to optimise but I can't think of anything novel about it. Any ideas. Will also post on its own thread to get ideas.

Thanks for sources, not thanks for destroying my free time.

Lot harder than I thought.

Good idea when it would be scheduled might be practical problem IMO.

Could be typo?

It helps if you circle a bit, bulls commit pretty well to a charge and usually shut their eyes just before impact unlike cows who are way more dangerous.cows stand up in front of you with their eyes open and try trip you by kicking forward with their front feet and rake with their horns. Polls...

Are we assuming the bull maintains a constant velocity , highly unlikely. This problem is so unrealistic in the context of a bull its useless, stick with hard balls in space.

Also consider the weight of the human, a big guy will get more impact from the same bull than a lighter guy.

I would take one step to the side just before estimated time of impact or throw a red rag on the ground and run up a tree. Fun fact: bulls run faster up hills than down hills.

Now there is a new misc of extreme miscers, they called old misc beta misc. The slang and extreme views on numisc is off the charts. Its a bit like 4chan for BB'ers. They do raids on old misc, so a lot of the weird stuff on misc is numisc guys raiding and trolling. The slang also helps...

negged.

Ha, someone on PF who has seen the great misc. beta ph***hitt. you mad brah.

Actually the more I think of "DYEP bro" the funnier it gets. It almost fell out of my mouth at someone today who astounded me with there stupidity.

JCB? Now I'm am not sure if efficiency is the right thing.

Work is energy tho??

The self discipline to achieve set goals thru hard work over a long period of time is certainly noteworthy.

Clearly the the lifting culture is not familiar to you, lot of young guys trying to prove their genetic superiority and dominance over other males thru weightlifting. Its a thing. Google "zyzz" if you want a cultural awakening. He bought lifting to the mainstream for the current generation...

Don't read too much into it, its a pop male culture thing to show how alpha you are. If a guy can't even do basic lifts these guys view them as degenerate. To be taken with a grain of salt.

trying to apply some physics to the 4 major power lifts. the key area I wish to analyse is bar path in a squat and deadlift. the work done against gravity is independent of path? a lifter can either have a straight as possible body path and deviate the bar path or the lifter can alter his...

Layne Norton is one brainy guy that lifts really heavy objects. Layne would laugh, hopefully , knowing he got referenced on a physics forum. Chemistry would be different, the knowledge a lot of lifters have about chemistry would embarrass the average chemistry graduate.