ANY DOUBTS HERE!!!

[sweetie]

Phy. help plz......

may09> Q18
Nov08. Q4
May08. Q31,22,16,14,12

[ruby92]

physics CIE paper 1
m/j 2006
15,12,17,22

o/n 2006
25, 27, 30,31,33,

[T.Q]

physics CIE paper 1
m/j 2006
15,12,17,22

o/n 2006
25, 27, 30,31,33,

m/j 2006

12. 4mX=3mv-2mv   speed = v/4   answer A

15. answer A  , 160=120+X    X=40  

17.  answer is D  , a=5 , 0=30^2 - 2x5xh

22. answer is B , area under graph = ( 0.5 x 0.01 x 500) + ( 0.02 x 500) +( 0.02 x 50 x 0.5)

[T.Q]

physics CIE paper 1
m/j 2006
15,12,17,22

o/n 2006
25, 27, 30,31,33,

o/n 2006

25. answer C , lamda=2pie,  1.5lamda=3pie

33. answer A , gradient=1/R 

[ruby92]

Thank You 

[Sue T]

i need some help with 5 (b) pls (question attached)

[nid404]

subject?

[Sue T]

phys

[ruby92]

chemistry doubt in equlibria:
in a question its given;
for an experiment to determine Kc 1.00 mol ethanoic acid 1 mol ethanol in the presence of 0.100 mol of H+ dissolved in 1 mol water.
where does the 0.100 mol H+ come in

[moon]

please I need help in specimen 6BIO2 Q4c.

[halosh92]

could anyone plz explain to me wat i have to know exactly in the potenital energy anf kinetic energy for AS level physics cie.
ijust dont get it.are there any rules for it???

[nid404]

i need some help with 5 (b) pls (question attached)

I've answered this before...wait i'll get you the link

[moon]

please I need help in specimen 6BIO2 Q4c.

nobody studies edexcel except me here

[nid404]

i need some help with 5 (b) pls (question attached)

there is a formula u need to know

phase difference=( 2pi/ lamda)  X path difference

phase difference = pi [ for destructive interference]
lambda(wavelength) = 2pi/ pi  X path difference.
path difference is S2M - S1M 
find S2M using Pythagoras = root of 802 + 1002
                                                   =128
path difference= 128-100=28
wavelength= 2pi/pi X 28
               =56cm                 
At f= 1KHz wavelength= 0.33m/ 33cm
At f=4kHz   wavelength= 0..0825/8.25cm
wavelength changes from 33cm to 8.25cm
for minima...phase difference should be either one of them pi, 3pi,5pi,7pi [sub them in the eqn]
minima is observed when lambda= 56cm, 18.7cm, 11.2cm, 8cm
which are the 2 values between 33 and 8.25?? 18.7 and 11.2...so only 2 minimas

[Dr.Black Knight]

nobody studies edexcel except me here

I too do edexcel
Does anyone have the core practicals for bio 1 and 2 I'm doing the alternative to practicals!!1
And for phy6!!!