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Oxbridge Physics Prelims Revision

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Haha, I might be dahn the bridge.

EDIT: but most my bridge mates will be revising.
Oh.. I just realised this thread will be redundant next week. What a shame. I loved it.
Reply 802
LennonMcCartney
We have a smooth differentiable manifold, equipped with a pseudo-Riemannian metric, of signature (+ - - -)...


When do physicists ever meet spaces that aren't genuine metric spaces? :rolleyes:

And are you presuming your manifolds to be paracompact? :biggrin:

Just checking - wouldn't want to get off on the wrong foot is such a cerebral thread. :eek:
Reply 803
Sorry guys for not replying, and yes, my name is Chloé. Have been looking after an extremely drunk simon (oxymoron on here) and stopping him from killing himself! Has been a long tiring night so don't have time to reply properly. Hopefully my prelims went well enough so that I have passed - that's all I care about.
Reply 804
Hoofbeat
Sorry guys for not replying, and yes, my name is Chloé. Have been looking after an extremely drunk simon (oxymoron on here) and stopping him from killing himself! Has been a long tiring night so don't have time to reply properly. Hopefully my prelims went well enough so that I have passed - that's all I care about.


what's wrong with oxo? :eek:
Reply 805
RichE
what's wrong with oxo? :eek:


and why isnt Chloé drunk herself!!??
She means by accident i.e. falling off a bridge etc :rolleyes: (I assume, unless his exam really was truly horrible)
Reply 807
Willa
and why isnt Chloé drunk herself!!??

She's a sensible person? :confused:
Reply 808
Camford
She's a sensible person? :confused:


taking that as a proposition, I shall prove by contradiction that she is not a sensible person.

The set of all rowers is a subset of all people who are not sensible
hence Chloé is a member of the set of people who are not sensible
hence Chloé is not a member of the set of people who are sensible

a contradiction! Your proposition is false!
Reply 809
Willa
taking that as a proposition, I shall prove by contradiction that she is not a sensible person.

The set of all rowers is a subset of all people who are not sensible
hence Chloé is a member of the set of people who are not sensible
hence Chloé is not a member of the set of people who are sensible

a contradiction! Your proposition is false!

That's not a proof by contradiction. You didn't start from my proposition. It's a straight forward deduction.
go Camfo, go Camfo go!
Reply 811
Camford
That's not a proof by contradiction. You didn't start from my proposition. It's a straight forward deduction.


ok then:

Suppose Camfo's proposition
Analyse The set of all rowers is by definition a subset of all people who are not sensible
hence Chloé is a member of the set of people who are not sensible
hence Chloé is not a member of the set of people who are sensible
Hence the original proposition is false


a mere technicality...you should know better!
Reply 812
Willa
ok then:

Suppose Camfo's proposition
Analyse The set of all rowers is by definition a subset of all people who are not sensible
hence Chloé is a member of the set of people who are not sensible
hence Chloé is not a member of the set of people who are sensible
Hence the original proposition is false


a mere technicality...you should know better!

You are still not working with my proposition. You are jumping in and say she's a member of rowers. well, I didn't say she's a member of rowers.
Reply 813
Camford
You are still not working with my proposition. You are jumping in and say she's a member of rowers. well, I didn't say she's a member of rowers.


it's a property of the entity Chloé.

whether you like it or not, I have proved that Chloé is not sensible by supposing she is sensible and showing that that leads to a contradiction.

and now i shall sleep!
Reply 814
Willa
it's a property of the entity Chloé.

whether you like it or not, I have proved that Chloé is not sensible by supposing she is sensible and showing that that leads to a contradiction.

and now i shall sleep!

No, the whole point of contradiction is you follow my lead and arrive at contradiction. And you didn't follow my lead. Therefore, your argument is not proof by contradiction.
Reply 815
Willa

whether you like it or not, I have proved that Chloé is not sensible by supposing she is sensible and showing that that leads to a contradiction.


I'm sure Brouwer would not have liked it :p:
Reply 816
lmao! guys I'm sober due to a number of reasons:

*I was racing yesterday
*I haven't "technically" finished my exams yet
*I was feeling too ill yesterday to go to the pub
*I was busy looking after a drunk simon
*I don't get wasted (the most drunk I got was at Exeter Ball and I think most people were just call that "slightly drunk")

Simon appears to be ok this morning (my friend checked on him) and has since gone to London with OOTB for another gig. He passed out for several hours on the quad yesterdat (pretty impressive as he drunk 12 pimms, 4 vodka shots and shared a bottle of champagne, and he's incrediably skinny and light!). Although we were worried several times when he locked his jaw and started shaking (thankfully it stopped within a minute or two and it wasn't full-blown fitting!), he did eventually get up to his room with help from others and we kept an eye on him for several hours. However, he INSISTED that he was well enough to attend a gig with OOTB up past LMH (we'd already told them he was too out of it to go and they'd said fine!) and got dressed into his suit and convinced us he was sober enough to go. So then myself and two other friends (one of them male incase we needed reinforcements!) went with him to the gig, let him perform (where he did look completely spaced out, but it went well) and then dragged him back to college, had some water in the bar, burger and chips and then to bed about 11:30pm. He however did kick a fuss up and wanted to go back to the turf and then filth with the other biochemists (and James from OOTB) but we refused - if only he'd seen himself earlier! I would post a photo of him up (we took lots to prove to him what he was like) but he might actually kill me, so I'll wait til he's seen them first!

Anyways, I'm now exhausted this morning having barely slept because of the noise in the quad, my conjunctivitis (eye drops need to be in a fridge and they're in someone else's room and I couldn't put any in last night as they weren't around!) and my cold and now need to start Quantum Ideas. So am going to be locked away in the library all day making notes on what we actually need to know (which is?!) so that I can spend some of Sunday & Monday revising it.
Reply 817
Hoofbeat
lmao! guys I'm sober due to a number of reasons:

*I was racing yesterday
*I haven't "technically" finished my exams yet
*I was feeling too ill yesterday to go to the pub
*I was busy looking after a drunk simon
*I don't get wasted (the most drunk I got was at Exeter Ball and I think most people were just call that "slightly drunk")

Simon appears to be ok this morning (my friend checked on him) and has since gone to London with OOTB for another gig. He passed out for several hours on the quad yesterdat (pretty impressive as he drunk 12 pimms, 4 vodka shots and shared a bottle of champagne, and he's incrediably skinny and light!). Although we were worried several times when he locked his jaw and started shaking (thankfully it stopped within a minute or two and it wasn't full-blown fitting!), he did eventually get up to his room with help from others and we kept an eye on him for several hours. However, he INSISTED that he was well enough to attend a gig with OOTB up past LMH (we'd already told them he was too out of it to go and they'd said fine!) and got dressed into his suit and convinced us he was sober enough to go. So then myself and two other friends (one of them male incase we needed reinforcements!) went with him to the gig, let him perform (where he did look completely spaced out, but it went well) and then dragged him back to college, had some water in the bar, burger and chips and then to bed about 11:30pm. He however did kick a fuss up and wanted to go back to the turf and then filth with the other biochemists (and James from OOTB) but we refused - if only he'd seen himself earlier! I would post a photo of him up (we took lots to prove to him what he was like) but he might actually kill me, so I'll wait til he's seen them first!

Anyways, I'm now exhausted this morning having barely slept because of the noise in the quad, my conjunctivitis (eye drops need to be in a fridge and they're in someone else's room and I couldn't put any in last night as they weren't around!) and my cold and now need to start Quantum Ideas. So am going to be locked away in the library all day making notes on what we actually need to know (which is?!) so that I can spend some of Sunday & Monday revising it.



there's only one thing you need to know for quantum: It all boils down to standing waves in a box! (The box can be various shapes...but it's always standing waves)

urgh please let my physics exam go well today :frown:
Willa
there's only one thing you need to know for quantum: It all boils down to standing waves in a box! (The box can be various shapes...but it's always standing waves)

urgh please let my physics exam go well today :frown:


Best of luck Will :smile:

Erm... for quantum I think its generally the following areas:

key experiments - Photo-electric, Franck-Hertz, Stern Gerlach - how they are set up and performed and what you would expect classically and experimentally.

Then you need to be able to work out the probabilities and what not for various Stern Gerlach apparatus.

Learn the Schrodinger equation and the 1 mathematical thing they will ask us (I guarentee the question is the same - its the only one they can ask us but with slightly different boundary questions.

Then finally entanglement - although I wouldnt bother too much, seems to be a nasty area and we only have to do 2 questions of 4 so Im not looking to do entanglement and EPR unless I really have to. I think its by far the hardest and fiddliest thing to do.
Reply 819
F1 fanatic
Best of luck Will :smile:

Erm... for quantum I think its generally the following areas:

key experiments - Photo-electric, Franck-Hertz, Stern Gerlach - how they are set up and performed and what you would expect classically and experimentally.

Then you need to be able to work out the probabilities and what not for various Stern Gerlach apparatus.

Learn the Schrodinger equation and the 1 mathematical thing they will ask us (I guarentee the question is the same - its the only one they can ask us but with slightly different boundary questions.

Then finally entanglement - although I wouldnt bother too much, seems to be a nasty area and we only have to do 2 questions of 4 so Im not looking to do entanglement and EPR unless I really have to. I think its by far the hardest and fiddliest thing to do.


Yeah good luck Will (although it may be a bit late now).

Thanks stu for the summary - that's what I thought we had to know. Spent about 2hours this morning staring blankly at my notes/books and have now just got tipsy on some Pimms (someone's birthday and they were celebrating in the quad and I got given a pint of very strong Pimms). Oh well, perhaps the work will go better now that I'm drunk....although I am feeling incrediably tired....

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