Gian

Don't know if this should be in the PHYSICS section or not I'm a digital animation student. I want to generate a video of what happened inside the passenger cabin of the Boeing 747, The Maid of the Seas (Pan-Am Flight103) when it exploded over Lockerbie Scotland at 31,000ft. What sort of physics would I need to map the event in realtime? 1. I've read that in a few milliseconds the explosion in the hold punched a 20" hole in the fuselage. This would cause an almost instant decompression of air exiting through the hole. Wikipedia says 0.1-0.5 seconds. Mathematically, how do I calculate exactly how fast in microseconds? 2.There are vents lining the cabin walls of an airliner (dado vents, image attached) which open to the hold in the event of a decompression in the hold, to prevent the floor collapsing. The investigators say the bomb did not disrupt the cabin floor. In the first few milliseconds, presumably everything in the cabin not tied down and above a certain weight would have flown towards the vents with the speed of debris from a grenade going off, but as an implosion. Is this right? 3. How to I work out how fast unsecured objects would fly towards the vents in the implosion? Could it carry a human being not strapped in his seat? In the video simulation attached it looks like it would be 4. Would the speed of objects carried by the implosion vary according to weight? 5. How would I work out if the implosion would be powerful enough to tear passenger seats from their moorings and towards the implosion? I guess I'll need among other things I'd need the air density of air at 31,000ft, the air density and volume inside the cabin and the number and size of the dado vents. This is about just in the first few milliseconds (I'll get to the physics of what happened when the fuselage broke apart later) Meanwhile I'm searching the net. Any ideas? Can you point me to anything I can read? Any guidance gratefully received Cheerz GIAN🙂XXX DECOMPRESSION SIMULATION: https://youtu.be/EHGBQINW0B0 DADO VENT:

The BBC's GCSE Chemistry page says there are eight 8 groups in the Periodic Table; 1-7, plus 0 (noble gases?) But there are ten columns between 2 and 3 with no number: https://www.bbc.co.uk/bitesize/articles/zptfn9q#zkn27yc However, other versions of the Table like this one from the The Royal Society of Chemistry show 18, eighteen groups. What's going on?? https://www.rsc.org/periodic-table I should emphasise that age 32 I'm pre-GCSE level so my science age is about 12½ please keep answers as simple as possible Cheerz GCSE GIAN😊XXX science age 12½

Thanks, will do! "GCSE GIAN" 🙂XXX science education age about 12½

Hi Gents, I'm not studying GCSE science (yet) but what I mean is I'm at about that level. But I've started using the GCSE syllabus as a guide, which I think is a sensible place to start. Although I also can't help looking at A level stuff, and stuff written by Prof Brian Cox et al. It's easy to get disheartened with stuff that's way over my head. I don't think I'm going to get this quantum "spin thing" at this stage, but I've just gotta tell myself I will get it one day However I think I'm getting on well with the structure of the atom, elements, compounds, molecules and mixtures. About to move onto ionic bonds covalent bonds. Thanks for all the input cheerz "GCSE GIAN" 🙂XXX science education age about 12½

So what is a "magnetic moment?" cheerz GIAN🙂XXX science education age about 12½

Thanks guys, well I don't think I'm going to get it this time, other than it sounds like it's like potential energy, wrapped up in the electron. I'm still at GCSE level maths and physics and quantum theory doesn't seem to come into it at this stage. Maybe it will become clearer when I've done a lot more stuff first. cheerz GIAN🙂XXX science education age about 12½

Thanks Mr Exchemist! I've just printed your reply and I'll get back to you as soon as I've digested it (or not lol) Cheerz GIAN🙂XXX science education age about 12½

Can't get my head around this. "Spin is the intrinsic angular momentum of particles. Spin is given in units of ħ which is the quantum unit of angular momentum where ħ = h/2π = 6.58x10-25 GeV s = 1.05x10-34 J s" At this stage I just want to know; 1 When it says "spin" is the "angular momentum," does it mean the speed that these particles (Fermions and Bosons?) rotate at, or what? 2. What's the h in the equation h/2π = 6.58x10-25 ?? 3. Is the funny symbol ħ to do with something called the planck constant? Cheerz GIAN🙂XXX science education age about 12½

Thanx, Can you give me an example of a "smallest complete subunit" please? Cheerz GIAN🙂XXX (science age; 12)

Thanks Mr Studiot! and thanks for the vid too; going to have to look at it a few times to really get it, but like all the best learning tools it motivates me to find out more, and thanks for keeping it simple (alot of the replies I get on this site use hifalutin jargon which I don't yet understand.) So sodium is a metal?? Didn't know that, So salt is 1 atom of sodium + 1 atom of chlorine? And thanks for the stuff about ethane and propane All I know about how the contents of molecules and compounds are held together is that they are "chemically bonded" according to the kids' books and vids I'm looking at and can be difficult to separate, so perhaps you can send me a link to some info about it please? (suitable for 12yo's) Thanks Mr Exchemist. So in simplest possible terms how do you define a molecule as opposed to these other giant structures? Cheerz GIAN🙂XXX (science age; 12)

Brilliant!!! This is the first occasion I've got something right first time on this site!! Next I'll be working for nasa!!! And mixtures or solutions could just be something like seawater; sodium and H2O mixed together? Cheerz GIAN🙂

Compounds are 2 or more elements chemically combined, and these also come under the heading of molecules. Molecules are chemical combinations which may involve 2 of the SAME and/ or compounds. So all compounds are all molecules, but not all molecules are compounds. So the oxygen in breathable air is a molecule O2, that is 2 oxygen atoms combined, but it's not a compound Is this right? I'm age 28 but my science level is about that of a 12yo so please keep answers appropriate to a kid! Best GIAN❤️XXX

But if the rest mass of the Falcon2 is the same at eg 95%c and the acceleration of 1G is the same as when the journey started, why does the relative mass increase? I know that's what the math requires, so I guess that's just the way the universe is constituted...🤯😊

Thanx. I'm still having difficulty with the meaning of "relativistic mass." Sounds like "mass" isn't a very good word to use in it. But I guess it means a kind of "virtual" mass. If the Millennium Falcon2's engines are accelerating (by 1G) upto 99%c for some reason a helluva lot more energy is needed even though the rest mass of the Falcon2 is the same and the acceleration is the same. Cheerz DECLAN

Hi Mr Halc, if the co-ordinate mass of the Falcon 2 is approaching infinte at 99.99%c, is it also true to say that objects stationary relative to the Falcon's velocity are kinda... much "lighter?" cheerz DECLAN xxx😊