Edexcel A2 Physics Unit 5 'Physics from Creation to Collapse'

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man the specimen paper really took me by suprise with the space stuff lol! i got 58% do you guys reckon that would have been a B grade?

Reply 721

omegaSQU4RED

NHjenson

man the specimen paper really took me by suprise with the space stuff lol! i got 58% do you guys reckon that would have been a B grade?

Don't worry about what you got on the specimen paper, the paper's crap.

Reply 722

NHjenson

yeah can't beleive they got the axis for the SHM question wrong :s-smilie:

, but am happy with what i got in at least i can sleep well tonight lol

Reply 723

Sasukekun

HassanBHS

Hey quick question plz!

What does the area under the graph represent for the graph of Energy output against wavelngth (astrohpysics) ??? :s-smilie:

thnx in advance :smile:

Kinda want to confirm this myself. I'm not sure if it's the total power output (total energy per second) or the total power output per unit area (flux). Can anyone confirm this?

Reply 724

lefneosan

OL1V3R

Or if you plot a graph of P against V it should look like the graph of y = 1/x, but if you plot P against 1/V you will get a straight line.

Why is that?

Reply 725

omegaSQU4RED

lefneosan

Why is that?

Because according to Boyle's law, the pressure of a gas at constant mass and temperature is inversely proportional to its volume.

Reply 726

unamed

HassanBHS

Hey quick question plz!

What does the area under the graph represent for the graph of Energy output against wavelngth (astrohpysics) ??? :s-smilie:

thnx in advance :smile:

total flux.

Just spent some time googling it to confirm it. :smile:

Reply 727

havinghoops

NHjenson

yeah can't beleive they got the axis for the SHM question wrong :s-smilie:

I actually love that question.

The kid is swinging backwards and forwards through time! :P

Reply 728

unamed

havinghoops

I actually love that question.

The kid is swinging backwards and forwards through time! :P

Unitl your comment just now, I still couldn't work out what was wrong with the graph! :p:

Reply 729

lefneosan

Hi could someone remind me what g is? completely forgotten!! My book defines it as "the grav force acting on unit mass at a point" does the unit mean per unit mass, like g=f/m?

Reply 730

omegaSQU4RED

lefneosan

Hi could someone remind me what g is? completely forgotten!! My book defines it as "the grav force acting on unit mass at a point" does the unit mean per unit mass, like g=f/m?

That's right! :smile:

Reply 731

nnamdi

Kameo

yh doesnt make sense.

d axis is actually right..time axis is x displacement is y..take the gradient where displacement is 0 to find the velocity

Reply 732

unamed

I'm getting really nervous for tomorrow. :eek3:

Reply 733

omegaSQU4RED

Here are some revision summaries of all the topics. Most of them have been scanned but one of them is a word document.

http://www.4shared.com/file/xvQ7QS1f/6PH05_Revision_Summaries.html?

Enjoy :smile:

Does anyone have a copy of the image of the A2 Physics ActiveBook (the one by Miles Hudson) on USB? I quite like the glossary on the disc but it's very slow to load and would be much less hassle just booting it off a USB pen drive.

Reply 734

unamed

^^Thanks for the notes! :smile:

Unfortunately, I don't have the glossary on USB - it's on my disk.

Reply 735

HassanBHS

unamed

total flux.

Just spent some time googling it to confirm it. :smile:

Area under graph for Energy output against wavelength = total flux :yes:

Thanx dude!!!

Reply 736

unamed

OL1V3R

thanks again! :smile:

your writing's quite neat! :biggrin:

Reply 737

Uberuvy

Im off, good night all and good luck for 2morow

Reply 738

lefneosan

Hi does anyone know if there is any interaction between white dwarfs and red giants? e.g. main sequence become red giants which then become white dwarfs?

Reply 739

Sasukekun

I am so sweating it about this exam. I've read all three of my text books, done those 200 past paper question someone linked, made brief notes, revised over and researched things I didn't quite fully understand and now reading through the syllabus making sure I know everything and making experiment plans that they might ask us. All in all I know it could be worthless if Edexcel bring some (and they will since it's a requirement) annoying applied physics bit that I won't understand ._. I think I've done the most I can though (props to the 11 day period between this exam and the previous one).