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# PHY5 Jun 05 Thread watch

1. (Original post by Steve8052)
so if i got -2, -2.5, -1.6 would it be wrong because i thought it must be negative for the standing wave to form.
i think they were supposed to be positive

vector addition of the two waves' displacements = standing wave's displacement

no?

just me?

****
2. (Original post by nas7232)
i got 2,1.6,2.5 [no specific order as ican't remember]
dont seem to remeber any such question *panicking*
3. (Original post by Mr Tom)
i think they were supposed to be positive

vector addition of the two waves' displacements = standing wave's displacement

no?

just me?

****
no..i agree
4. i had first value of 0cm -2cm was one and cant remember other one
for 2 waves to form a stationary they must be in antiphase, there are points were the vector sum of the displacemnts are = 0 (nodes)

Oh come to think bout it i got that totaly wrong
oh **** i knew i shouldnt have checked this thread , always makes me feel bad
5. (Original post by hajira)
no..i agree
w00h00

6. (Original post by hajira)
no..i agree
i dont agree with u because they were all out of phase so the displacements were the differences between the two.
7. (Original post by DmAsTeR)
i dont agree with u because they were all out of phase so the displacements were the differences between the two.
where does phase come into all this? It was a simple displacement questions! answers were something like 2.5, 0 and -1.6 - i got somethihng like that
8. aint this a phy5 thread lol
9. (Original post by DmAsTeR)
i dont agree with u because they were all out of phase so the displacements were the differences between the two.
well the way i thought of it was in terms of the graph.
if the 'resultant' wave was drawn..n one of the 'component' wave was drawn..
u wud take away the displacement of the 'resultant' from the 'component' wave's displacement
ew
that sounds horrible
but anyway
thats the way i looked at it..cuz at any one point the total displacement is equal to the displacements of the two combining waves

o n yeash...it does happen to b a phy5 thread
10. (Original post by Phil23)
where does phase come into all this? It was a simple displacement questions! answers were something like 2.5, 0 and -1.6 - i got somethihng like that
wohooo i got somin similar
0 for first one then ............ oh no wait i got -2 and 1.6 (cant remember which ones were negative if any)

so 2/3 not bad (if phil is correct)

anyway if u guys spent the same amount of time posting in the phy6 revision thread the world would be a happier place for all
11. (Original post by Phil23)
where does phase come into all this? It was a simple displacement questions! answers were something like 2.5, 0 and -1.6 - i got somethihng like that
i think i got 2, 2.5, -1.6
12. anyway for phy 5 practical what did u lot get for the y intersept on the very last question? i think i got somethin like 3
13. (Original post by DmAsTeR)
anyway for phy 5 practical what did u lot get for the y intersept on the very last question? i think i got somethin like 3
st 30-something - was ages ago - think i got 2.4, - i cant remember was easy though - think i got 92% or around that - only messed up that describing the experiment bit for the section C

how'd you find it?

pk
14. Yes Anotha Winnin Thread For The Mack Man
15. ^lol

Lets keep this thread focused on PHY5, not 4!
There is already a thread for that
16. (Original post by Phil23)
st 30-something - was ages ago - think i got 2.4, - i cant remember was easy though - think i got 92% or around that - only messed up that describing the experiment bit for the section C

how'd you find it?

pk
that was easy...they told us everythin we needed to do... never even needed to think for anythin...they gave us a formula for that experiment...all u need to do was rearrange it and apply a method...then u get the values in the table..plot a graph..and draw a straight line and read off the y-axis...i did it a bit wrong as i plotted the graph the other way round but i got the answer as i just needed to read off the x-axis....so all was good...everyone should have got an A for that.
17. (Original post by DmAsTeR)
that was easy...they told us everythin we needed to do... never even needed to think for anythin...they gave us a formula for that experiment...all u need to do was rearrange it and apply a method...then u get the values in the table..plot a graph..and draw a straight line and read off the y-axis...i did it a bit wrong as i plotted the graph the other way round but i got the answer as i just needed to read off the x-axis....so all was good...everyone should have got an A for that.
easier than the AS practical for sure! i messed up my actual AS practical, and my resit this year - aghhh - AS practicals are so dodgy!
18. Does any of you know when we will be able to get the marking schemems for June 2005? It would be a lot better than guessing and discussing!!
19. about 2 months time
20. Hopefully one of us will get 90/90, 120/120 in every paper so we can use them as a markscheme

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