June 2011 G485-Fields, Particles and Frontiers of Physics Watch

muffingg
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#421
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(Original post by sulexk)
If you are travelling in the northern hemisphere, then the magnetic field is going down(since the earth's north pole- is like a south pole-field lines going into). since the plane is travelling east to west- think about the positive charge between the wingtips(two ends of the wings)- they too have a velocity in the direction east to west so our current if we use the left hand rule is east to west, and we are trying to understand the direction of the force on this positive charge, which is moving between the wingtips. So magnetic field into the page, current east to west, and gives a force acting downwards(not into the page, but downwards).This tells us that the positive charge will moves towards the left wingtip making it positive.

I hope that helps, I can make it even more simpler if you want, but let me know if you have any questions please

This is a case of induced EMF(between the wingtips)
Thank you!
Thanks. Got this bit. Just another short question: Does that mean that if we connected the plane to a lamp, the lamp would glow?
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muffingg
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#422
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#422
(Original post by M_I)
Is 2x10^10 = 20 billion?
Yes.
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superpope99
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#423
(Original post by M_I)
Is 2x10^10 = 20 billion?
yes
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sulexk
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(Original post by muffingg)
Thanks. Got this bit. Just another short question: Does that mean that if we connected the plane to a lamp, the lamp would glow?
Well I guess if we connected it to the wingtips, and made a complete circuit then possibly. If the current is too high though then lamp may explode!
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Nirgilis
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Howdy guys! :hat2: .. Looks like I'll be resident of this thread for the next 8/9 hours now that C4 has finished

How confident is everyone feeling?
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trapzbrah
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(Original post by Kidms001)
Howdy guys! :hat2: .. Looks like I'll be resident of this thread for the next 8/9 hours now that C4 has finished

How confident is everyone feeling?
how'd you find C4?
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superpope99
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(Original post by sulexk)
A simple history of the universe, possible question:

Big bang
quarks and leptons existed freely ( at a temperature of around 10^14 K)
Quarks combined to form hadrons, such as protons (at a temperature of around 10^12 K)
atomic nuclei began to form by fusion ( at a temperature of 10^7K)
Do we need to know timescales for this? or just temperatures
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Nirgilis
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(Original post by trapzbrah)
how'd you find C4?
Shhhhhh... :ninja: .. We can't talk about it till midnight.
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TobeTheHero
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#429
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#429
C4 done. Now G485 to go
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jam.wa
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#430
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#430
Stuck for things to do...

Are people finding 1h45m to be a good amount of time? They haven't seemed anywhere near as pressurised as the Chem...
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trapzbrah
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(Original post by Kidms001)
Shhhhhh... :ninja: .. We can't talk about it till midnight.
inb4 edexcel mods
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luuucyx
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#432
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just about to start my revision for this :|
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TobeTheHero
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#433
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is the exam tomorow afternoon or morning?
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TobeTheHero
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(Original post by luuucyx)
just about to start my revision for this :|
PM how you found C4 Lets compare Don't post here!
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Nirgilis
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#435
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(Original post by trapzbrah)
inb4 edexcel mods
Plus I don't fancy getting banned when I've spent £32 on membership :hmmm:
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trapzbrah
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(Original post by Kidms001)
Plus I don't fancy getting banned when I've spent £32 on membership :hmmm:
One of us is in deep trouble...
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susan23
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#437
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#437
la la la hows it going peeps?
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Nirgilis
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#438
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#438
(Original post by trapzbrah)
One of us is in deep trouble...
Really? We haven't mentioned anything related to "the test" :ninja:


On a related note, can someone show me a conversion for Hubble's constant into s-1?
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superpope99
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superpope99
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#440
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essh, that was a bit too big
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