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Alevel Further Maths
hi there "toxicdevil" I had encountered similar conditions as u. Actually,I had been thinking abt studyin' further maths @ A level when i was in O levels, solely cos ov ma intense passion 4 maths. That was the reason i studied O lvl Add Maths privately (cos ma skewl wasn't offerin' it), which... -
Physics MCQs thread.
by Zishi » Fri Jun 03, 2011 12:00 pm hassam wrote:Zishi wrote:hassam wrote:b.PNG Because while its being earthed, and at the same time there's an electric filed between the plates, the charge won't move down the earth. It's a fact, learn it. zisi this is wat ER says...bt i cnt undrstnd it... -
Physics MCQs thread.
hey zishi m afraid that half a wavelength has an angle of 180 degree while quarter, 90 degree. So, we can't eliminate the "45 degree option" so easily. Btw hassam yar, u cud use the fact that the given wave is a sine curve with amplitude y_0. Now imagine moving from say d = 0 degree (although... -
Chemistry MCQ thread...
it took me atleat 2o hours (a day and a ni8) in a row to jux browse this thread oMG :crazy: -
MATHS P3 HELP!
jux use the identity that tan(2A) = 2tan(A)/[1 - tan^2(A)] and it will then b a PIECE of CAKE....;p -
AS PHYSICS!!!
Yeah sAm buddy i do remember it @ "the thing 2 notice was that 'fringe width which remains constant in an interfernce pattern such as this one'." Therefore, it's "A" -
oct/nov 2010 phy paper 22
@ hassam yar --> ur interpretations seem quite reasonable -
MATHS P3 HELP!
i guess u can express t in terms of (i) x using the 1st equation (i.e. work out the inverse function of the given function of x) and also in terms of (ii) y using the 2nd equation (i.e. work out the inverse function of the given function of y) Then as both expressions in x and y respectively... -
AS PHYSICS!!!
For the last question (it was quite interesting btw...;p), the answer seems to be "C" Working: The keyword "ideal" in 'ideal voltmeter' implies that the voltmeter has infinite resistance i.e. it gives the p.d. b/w the two points it is connected to, without drawing any current 4m the circuit... -
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Mathematics
You can arrange 10 different objects in 10! ways. In the given question, although 5 of the objects have to be placed in a specific order, 5 such objects could be arranged among themselves in 5! ways with no restrictions. Hence the given problem can be solved in 10!/5! = 30240 ways -
AS PHYSICS!!!
salam This question doesn't seem to make much sense to me. Anyways, as far as i cn understand, part "A" shud be false. That's cos when the switch K is closed, the current in the lower circuit will by-pass R2 (since current always chooses the path of lowest resistance, so it will pass through... -
bond angle
Check this out @ http://en.wikipedia.org/wiki/Phosphine See the H-P-H bond angle given there as 93.5 degrees This is anoth3r contradiction jux like H2S. The truth is that the cambrigde is afraid of facing the reality and tends to teach its students what is easy to understand, even if it's... -
bond angle
The larger the central atom is the less the hydrogens have to spread out (because the electron repulsions are smaller) and the smaller the resulting angle. This explaination seems quite controversial to the A level Chem content, but u all know there are AlwAys some exceptions in all... -
Further MAth doubt!! please help asap
salam 9231/01/M/J/05 10(ii) (z + 2)^12 = z^12 [(z + 2)^12]/z^12 = 1 [(z + 2)/z]^12 = 1 [1 + 2/z]^12 = 1 Now, using the answer to part (i), we get 1 + 2/z = exp[(k*pi*i)/6] 2/z = exp[(k*pi*i)/6] - 1 z = 2/[exp{(k*pi*i)/6} - 1]... -
help chem mcqs....
N2 + O2 --> 2 NO delta H = 43.2 kcal. It takes heat to make 2NO i.e. the reaction is endothermic, taking 43.2 kcal per mol :P -
tough mechanics question...!!!
salam hey check if these answers are ok? (i) coefficient of friction = [8 + 5*sqrt(3)]/19 (ii) mu = [5*sqrt(3)]/13 (iii) a(upper block) = [50*sqrt(3) - 13]/18 ms^-2 a(lower block) = 0 ms^-2 since the magnitude of friction is greater than D.F. -
Maths P3 s10_qp_31.
In this part, u need to consider a point in the shaded region such that the line joining the origin (i.e. the intersection of the imaginary and real axes) to the selected point makes the least angle with the real axis [i.e. arg(z) is min]. Applying common sense, one almost immediately realizes... -
Further MAth doubt!! please help asap
salam i hav recently started studying linear algebra (matrix algebra and vector spaces), so i may nt b a gr8 help. Well, I culdn't get ur question clearly @ "in vector spaces when ur trying to reduce to echlon wat if in the leadin diagonals u get zeros how do u continue." Anyways, since the... -
MATHS P3 HELP!
U may also project the vector AB (i - 8j - 9k) in the direction of the perp. vector (2i - 2j + k) i.e. [(i - 8j - 9k) x (2i - 2j + k)]/[|2i - 2j + k|] ----> = 3 units