The Ultimate AS Physics Thread

[hassam]

well see the first diaagram fig 5.1.....this is the normal extension....u can only apply f=k.e to this diagram but since we hav no data for extension in this diagram we cnt do that....now we know change in g.p.e will be equal to gain in strain energy....so in fig 5 equate this value to .5kx*2 to find k...hope u got it..u cnt apply f=k.e to this diagram cos u urself moved it up and then relesaed it.....it cn by the way only be applied in most ordinary case....such as first fig

 

[Mueez]

@libra 94
find da value of k by 0.024=1/2 k (0.026)*2
put this value of k in new equation i.e 0.012=1/2 kx*2 nd find x

 

[JustinCredible]

can some1 please help me with the vector diagram in q2c of J10/23?
MS:http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s10_ms_23.pdf
QP:http://www.xtremepapers.me/CIE/International%20A%20And%20AS%20Level/9702%20-%20Physics/9702_s10_qp_23.pdf

 

[DeathDealer]

Tch........=/

Hi Guyx........! A'o'A
Can Any()ne Ov u Let me Clear about Da Wavelengthx Ov electromagnetic Spectrum
Az WeLL Az Ov VISIBLE LIGHT Startin from red --> violet/blue

 

[rasesh popat]

can anyone tell me the working for question 4(c)(ii)2 in this paperhttp://www.xtremepapers.me/CIE/International A And AS Level/9702 - Physics/9702_w09_qp_22.pdf

 

[girlscampisra]

Re: Tch........=/

Hi Guyx........! A'o'A
Can Any()ne Ov u Let me Clear about Da Wavelengthx Ov electromagnetic Spectrum
Az WeLL Az Ov VISIBLE LIGHT Startin from red --> violet/blue

V=650 nm
I=520 nm
B=560 nm
G=600 nm
Y=625 nm
O=700 nm
R=750 nm

Radio wave = 3 m
Microwave = 3 x 10^2 m
Infra red = 10^4 m
Ultra violet = 10^8 m
X-ray = 10^10 m
Gamma = 10^12 m

 

[girlscampisra]

oops sorry violet is 450 nm

 

[DeathDealer]

k = 1.8 Ncm^-1 which iz equal to 180 Nm^-1
Stored Energy = 1/2*k*X^2
Force "F" iz UnKnown
Hence.........
Initial Total extention subtracted by Extention caused by jxt 3.8N FOrce
Stored Energy = 1/2*180*(0.036)^2 - 1/2*180*(0.021)^2
===>
1/2*180*(0.036^2 - 0.021^2)
= 0.07695 J
= 0.07 J

 

[DeathDealer]

0.077 J Sorry

 

[mury456]

someone help me out with this ??
please

 

[nealDSA]

Use Lambda = Velocity Of Sound / Frequency >> ( 330 \ 550 ) * ( 100 )

 

[mury456]

yo thnk

 

[libra94]

someone help me out with this ??
please

i think u're asking abt part (ii)
i just answered it a minute ago
here: viewtopic.php?f=26&t=7988&start=10

 

[mury456]

Use Lambda = Velocity Of Sound / Frequency >> ( 330 \ 550 ) * ( 100 )

yy into 100 thou ??? 330 is in metres itz already in base units ??

 

[libra94]

Use Lambda = Velocity Of Sound / Frequency >> ( 330 \ 550 ) * ( 100 )

yy into 100 thou ??? 330 is in metres itz already in base units ??

cuz they want in cm!

 

[nerdybookworm]

CAN SOMEBODY PLEASE GIVE ME THE LINK OR ANY SOURCE FOR M/J AND O/N 02 MARKSCHEME PAPER 1!!!!!...?????